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Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Grain loss rate is one of the most important performance index of corn head in mechanized harvesting. Seed harvesting is the main development direction of mechanized corn harvesting. The characters of seed harvesting corn variaty increased the urgency to reduce grain loss on corn head. The paper was proposed to solve the problem of grain loss on corn head. Theoretical analysis was conducted to the snapping process. Corn ear was subjected to pull force by the snapping rolls and the pull force transferred by corn stalk. Corn kernels were divided into 2 types due to their force condition. A kernel at the bottom end of corn ear was subjected to reaction forces by stripper plates, corn cob and the adjacent kernels and shear force by the pedicel. Kernels out of contact with the stripper plates were subjected to reaction forces by the adjacent kernels, pull force and shear force by corn cob. As the impact force was related to the impact time according to the theorem of impulse, the paper analyzed collision model between corn ear and stripper plates in the snapping process. A mathematical model was obtained about the impact time and intrinsic parameters of the system. The impact time was dependent on system mass, stiffness coefficient and damping coefficient, which lays on the mechanical structure and materials of collision objects. So, the impact force would decrease as the impact time could be prolonged by reducing the stiffness coefficient and raising the damping coefficient. The quantity of shed kernels could be reduced consequently. The paper proposed a corn head with wheel type rigid-flexible coupling snapping device to reduce loss. The corn head consisted of the frame, gear-box, snapping rolls, gathering chain, wheel type rigid-flexible coupling snapping device, and chain wheels. The wheel type rigid-flexible coupling snapping device consisted of snapping wheel axle, spring seat axle, supporting axle, buffer spring, and snapping wheel frame. Force analysis was conducted on the snapping wheel. According to the force conditions and dimension boundary condition, the structure diameters of snapping wheel, snapping wheel frame, and buffer spring were confirmed. In order to obtain the optimal parameters with the minimum loss rate of wheel type rigid-flexible coupling snapping device, the optimization experiments were conducted of the factors at 3 different levels. In the optimization experiments, the snapping wheel radius was designed at 10, 15 and 20 mm respectively, the flexible body thickness was at 2, 4 and 6 mm respectively, the snapping rolls rotating speed at 700, 800 and 900 r/min respectively. The Response Surface Analysis method was used to design the experiments. The software Design-Expert 8.0.6.1 was used to analyze the data. Regression equation was induced according to the experiment and analysis above. The optimal combination of wheel type coupling snapping device was as follows: The snapping rolls rotating speed was 700 r/min, the snapping wheel radius was 15 mm, the flexible body thickness was 4 mm. Verification contrast test was conducted between corn head with wheel type rigid-flexible coupling snapping device and the one with snapping rolls and stripper plates on corns at different moisture contents. As the kernels moisture contents were 21.8%, 16.7% and 13.4%, the grain loss rate decreased 53.4%, 48.6% and 47.0% respectively. This study provides not only theoretical basis but also design reference for the improvement of corn harvester design. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper was aimed to reduce the vibration energy transitivity form the cutting table of the combine harvester to combine. In this paper, the 4 L-0.2 micro combine harvester was chosen as the object, the structure of the machine and the characteristics of the header were analyzed, and the minimum vibration amplitude point of the cutting table was found by using the minimum amplitude point method. Then the finite element modal analysis of the cutting table was carried out by using the modal analysis software Workbench, and the first four order modal frequencies and shapes were obtained, which were also acquired through the modal experiment of the cutting table. The experiment result was proved to be believable by comparison with the finite element modal analysis result. Three different experiments were performed, which included the preliminary experiment, the single-frequency excitation experiment and the verification experiment. In the preliminary experiment, the motor was used to provide the power which was used to drive the cutter installed on the cutting table to reciprocate; the preliminary experiment was done under the condition of low frequency, and 3 different frequencies, which had significant influence on the vibration amplitude of the points, were obtained, which were 5, 10 and 15 Hz respectively. The single- frequency experiments were done on the base of these 3 frequencies. In the single-frequency experiment, a small area that contained the positions of the first four order modal node of the experiment mode was divided out from the experimental area on the cutting table. Some points were randomly chosen in the small area, and the exciter was used to force the cutting table to vibrate. The values of vibration amplitude of the points chosen were obtained, and they were imported into the MATLAB together with the coordinate values of the points. The least square method was used to obtain the fitting curve, which illustrated the relationship between the coordinate value and the value of vibration amplitude of the points. The points that had the minimum value of vibration amplitude were found at each frequency. According to the vibration theory, it could be seen that the value of the vibration amplitude in the time domain was the superimposition of the value of amplitude of each frequency. The weighting factors corresponding to the 3 frequencies were obtained, which were 0.54, 0.3 and 0.16 respectively according to the relationship between the 3 different frequencies obtained from the preliminary experiment. The positions of the points that had the minimum vibration amplitude could be calculated with this set of weighting factors. In the verification experiment, the motor was used to provide the power for driving the cutter installed on the cutting table to reciprocate. The experimental data were calculated and the experimental result was consistent with that of the finite element analysis, and the positions of the points that had the minimum value of the vibration amplitude were obtained, which weighted average magnitude for the region (29.707 m/s2) 89.29%, the maximum amplitude point amplitude (35.044 m/s2) 74.92%. At the end, the optimization scheme which provided the best position for the installation of the cutting table was put forward according to the result. After changing the connection point, the cutting table's structure was analyzed, and the results showed that the structural strength of the cutting table met the requirements. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The application of mechanical transplanting on crops can effectively increase the product of crops and reduce the labor intense as modern cultivation techniques. But the popularization and application are limited by the problem of lower upright degree to some certain extent. A new type cam-swing link type transplanting machine was designed to solve the problem of lower upright degree in current pot seedling planting machine. In addition, the receiving seedling stability of planting apparatus can be guaranteed well, owing to double parallel four-bar mechanism of this planting machine. In this paper, the kinematic model of the transplanting machine was established, including the equations of planting trajectory, planting velocity and planting acceleration for the planting device. For the purpose of high efficiency, interactive GUI design tool had been explored based on the MATLAB/GUI according to these mathematic equations. The influences on the transplanting trajectory of main parameters were analyzed based on MATLAB tool, including the length L1 and original phase angle Φ1 of crank CD, the length L2 and original phase angle Φ2 of swing AB, and the length L5 of link AG. The system parameters which had great effects on the planting trajectory were L1, L2, Φ1 and Φ2. These parameters were analyzed and optimized through the method of orthogonal experiment. The experimental scheme was designed according to orthogonal table off our factors and three levels. By analyzing the range table of residual, the parameter could be ranged as L2, L1, Φ1 and Φ2 from big to small, considering the degree of significant on upright degree of seedlings. The optimal combination could be selected that L1 is 118 mm, L2 is 52 mm, Φ1 is 256°, and Φ2 is 316°. Under the condition of this optimal combination, the motion model of transplanting machine was reestablished to generate a new optimized planting trajectory. The top of this trajectory was smooth to benefit the receiving seedling stability of planting device. As the total height of this trajectory was about 256 mm with 190 mm higher the ridge side, the planting device could avoid touching down seedlings planted effectively. When the planting depth reached 60 mm, the maximum residual of curve at planting seedlings parts was 0.465 mm, the mean residual was 0.253 mm, and penetration angel was 81.05°. The simulation results indicated that this optimized planting trajectory can improved the anteversion problem of seedlings that caused by compaction wheel and ensured the seedling planted higher upright degree. In order to verify the reasonability and accuracy of the theoretical model, the prototype was processed with the optimized parameters. Based on the prototype, field tests were carried out according to relevant standards in Yiyang county industrial park of China in March 2015. No crops were planted and the ridge film was mulched in the test plot before the testing, for simply obtaining test results without effects of the other crops. During the course of experiment, 30 horse-power tractor was selected as the only power. The total height of seedlings used was no more than 150 mm, and the height of seedlings substrate less than 60 mm. The plant vertical degree was considered as the main optimization indicator which influenced by the main parameters mentioned above. The data results showed that the mechanism proposed meet the requirements of pot seedling agricultural plant at the speed of 0.556 meter per second, and planting frequency was 60.7 plant percent minute. The qualified rate of upright degree with the variation coefficient of 2.03% was 95%, lodging rate was no more than 1.67%, and plant spacing error rate was only 0.22% with no lacking of seedlings. The results indicated that this machine had the good planting performances of high upright degree and low spacing error rate under the condition of high efficiency of planting. What this paper studied will provide theoretical reference for the subsequent transplanter research and development. [ABSTRACT FROM AUTHOR]

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Mechanical precision seed metering device is widely used in precision seeding technology because of its simple structure and uniform seed metering. Seed filling process is the key link of the whole operation process of seed metering device. The precision metering device is mainly divided into internal filling, side filling, external filling, and the combination of side filling and external filling according to the seed filling mode. In the operation process, the internal filling mode mainly completes the seeding operation through the process of type-hole filling and gravity clearing, and the seed motion parameters close to the type-hole directly affect the seeding quality of the machine. The rotary type-hole cotton precision seed metering device is a kind of mechanical precision seed metering device. In order to solve the problem of missing seed in the process of filling, the influence of the motion parameters of rotary type-hole cotton precision seed metering device on the filling performance by establishing the kinematic model of the seed filling process in this paper. Using the discrete element simulation software to analyze the speed change trend of cotton seed falling into the type-hole and the influence of seed wheel vibration frequency on seed group disturbance. Taking the vibration frequency of seed wheel, vibration offset angle of seed wheel and rotating speed of metering device as the test factors, and taking the qualified rate of seed spacing, replaying rate and missing rate as the test indexes, three factors and five levels of positive traffic rotation combined test are carried out to explore the influence of each factor on seed metering performance. Design expert 8.0.6 software is used to analyze the test results and optimize the regression model. Single factor simulation test results show that the instantaneous speed of cotton seed increases with the increase of the rotating speed of the seed wheel, the instantaneous speed of the cotton seed is less than that of the seed wheel when it is filled into the type-hole, the cotton seeds with lower relative speed have better filling effect. When the vibration frequency of the seed wheel is 7 Hz, the average value of the normal force of the seed group is the smallest, which is 0.75 N, at this time, the internal friction of the seed goup is the smallest, the cotton seed is easy to be taken by the type-hole, and the seed filling performance of the seed metering device is improved. The simulation results of quadratic regression general rotation combination show that when the rotating speed of the seed metering device is 12.59 r/min, the vibration offset angle of seed wheel is 8.06° and the vibration frequency of seed wheel is 6.08 Hz, the qualified rate of seed spacing reaches the maximum of 94.5%, and the leak seeding rate is 2.9%, the repaly rate is 3.3%. On this basis, the platform validation test was carried out with Xinluzao No.61 cotton seed as the test object. The test results showed that when the rotating speed of the seed metering device was 12 r/min, the maximum qualified rate of the seed spacing was 94.65%, the error between the rotating speed of the seed metering device and the simulation test is 5.4%, which verifies the accuracy of the simulation results. This study can provide a reference for the structural optimization of the key components of the rotary type-hole cotton precision metering device. [ABSTRACT FROM AUTHOR]

Yellow silage corn stover is taken as a kind of important feedstuff for animal husbandry. Corn stover pickup balers are used to collect the stover and bundle it into straw bale in the harvest process of yellow silage corn stover. But in Northeast China, the soil has strong adhesiveness when it is in high moisture content. And when the moisture content is low, the soil disperses into fine particles which are easily carried in the miscellaneous branches of stover. It is a fleeting moment when stover is gathered and transported into baler. Soil adhered to stover and carried by the branches can’t be removed in this short process. As a result, high soil content reduces feed quality of yellow silage corn stover. In order to solve the problem of high soil content of yellow silage corn stover, the paper proposed to remove the soil adhered and included in stover by means of vibration. The soil removal mechanism of stover pickup baler by vibration was fitted on the bottom of the machine. It is connected between the pickup unit and the cutting and rubbing unit. Stover can be picked up and delivered to the vibrating conveying screen to remove the soil. Then, the stover would be robbed, cut and bundled. The operating principle of the test-bed was clarified through the design of the test-bed and analysis of high-speed camera. Collision between stover and screen and internal friction of stover could release soil in the stover. Stover thickness, vibration time, vibration amplitude and vibration frequency were 4 influencing factors acting on performance of soil removal in the tests. Taking the soil removal rate and the stover loss rate as indices, single factor experiments were conducted to determine the value range of each parameter on the whole-plant stover (long stover) and chopped stover (short stover) on the ground respectively. The result showed that the soil removal rate and the stover loss rate increased with the increase of vibration time, vibration amplitude, and vibration frequency. But the soil removal rate and the stover loss rate dropped with the increase of stover thickness. It was given that the focus ranges of values of all parameters were vibration time from 10 to 14 s, vibration amplitude from 10 to 20 mm, vibration frequency from 4 to 6 Hz for long stover, and vibration time from 12 to 16 s, vibration amplitude from 10 to 20 mm, vibration frequency from 4 to 6 Hz for short stover. Through the three-factor orthogonal polynomial regression test, the author found the change laws of the soil removal rate and the stover loss rate determined by vibration frequency, vibration amplitude and vibration time. Four regression equations were induced according to experiment and analysis above. Then, a comprehensive index indicating soil removal rate and stover loss rate toward the optimum synchronously was made to evaluate the effect of soil removal. By analyzing the regression equations and the comprehensive index, an optimal solution was obtained. The optimal combination of soil removal from corn stover by vibration was as follows: For the long stover, the vibration amplitude was 15 mm, the vibration frequency was 4.5 Hz, and the vibration time was 14 s; for the short stover, the vibration amplitude was 20 mm, the vibration frequency was 4 Hz, and the vibration time was 12 s. Verification tests were conducted on the test-bed to verify the results above. Through calculating with the regression equations, the soil removal rate and the stover loss rate of long stover were 4.71% and 0.34%, respectively, and for short stover, the calculating results were 4.44% and 1.42% respectively. In the verification tests, the results were 4.80% and 0.38% for long stover and 4.72% and 1.53% for short stover. By comparing the simulated and the experimental result, it was found that the relative errors of the soil removal rate and the stover loss rate were acceptable. It was believed that the result of mathematical model matched the test result well. This study provides references not only for removing soil from stover by vibration, but also for the improvement of corn stover pickup baler design. [ABSTRACT FROM AUTHOR]

The seed potato distribution is not uniform, and the seeding quality and quality of back fill is poor when potato seed casting into the furrow by using the ditching shoe and disc opener. In this study, the splitter sliding-knife potato opener was designed and optimized. It had a good embedded performance. The opener was towed by a tractor when the potato planter was operation. The installation site was under the seed-metering device and the longitudinal direction of opener can be adjusted to requirements. A V-shape furrow was got after the working process of opener. The soil particles were cutting and crashed by the edge of the shovel at the front side of the opener, and moved along the side surface of opener. Some of soil particles were fall into the furrow firstly to create a soft furrow thus providing a better furrow situation for potato to grow. In this paper, we also obtained the main factors that influenced soil covering for seed potato, by analysis of the soil particles in the process of motion on the side of the opener and the process of soil fall into furrow, and also kinematics analysis the seed potato falls into the furrow. The time at which the soil particles contact the bottom of the furrow was less than the time at which the soil particles fall into the furrow at the range of the resting angle. The planting effects were not only influenced by the parameters of opener, but also had a connection with the position of potato casted into furrow. The ideal seeding condition is that the potato fall into the bottom of the V-shape furrow, the lateral deviation coefficient of the seed potato is well, and the sowing quality is higher. To get good effects of planting, the time of potato fall into furrow should be less than that of soil particles fall back into furrow. The factors influencing the effect of the potato seed in the ditch were obtained through theoretical analysis after the movement parameters of planter were collected, and they were forward speed, depth of furrow, the length of opener and side angle of opener when initial conditions of the seeding were determined. A rotating orthogonal field experiment was designed. With forward speed, side angle of opener, length of opener and depth of furrow were taken as the experiment factors, coefficient of variation of row spacing, sowing width mean absolute deviation and quality of back fill as the test indices. The test was implemented in Heilongjiang Academy of Agricultural Sciences in June, 2015. The results showed the primary and secondary order of influencing factors for each test index. For the coefficient of variation of row spacing, the order was the depth of furrow, forward speed, the length of opener and side angle of opener. For the sowing width mean absolute deviation, the order was the depth of furrow, forward speed, side angle of opener and length of opener. For the quality of fill back, the order was the depth of furrow, forward speed, the length of opener and side angle of opener. The best structure parameter of splitter sliding-opener was obtained through field test. And results showed that the coefficient of variation of row spacing was 10.8%, sowing width mean absolute deviation was 3.83 mm, the quality of fill back was 24.1%, when the forward speed was 0.95 m/s, the opener of the side angle was 60 degree, the opener length was 500 mm, the depth of furrow was 115 mm. The comparison test showed that the V-furrow out of slide-knife opener was better than the ditch out of the traditional shoe-type opener. The reason was that the V-furrow can reduce seed movement and lateral displacement, to improve the consistency of the seed space. Besides, when the combination of the length of slide-knife opener was 500 mm and the side angle of the opener was 60°, the machine can provide enough time for potato seed into furrow, and the quality of fill back was also large so that potato seed can have enough soil cover and have a good ambient temperature and humidity for its growth. The sowing quality for the splitter sliding-opener was better than traditional opener. The opener designed was meeting the requirements of potato planting. The study of potato furrowing seeding device provided with reference to the design of a new theoretical support. [ABSTRACT FROM AUTHOR]

With the increasing use of agricultural plastic film, the pollution it bringing is becoming more and more serious. It has become a problem which needs to be solved urgently. In China, the plant areas of peanut were expanded to 460.6 hm2 in 2014, which accounted for about 17.9% of the global area of peanut crops. And its output reached to 16.481 7 million tons in the same year, which accounted for about 38.9 % of the global production of peanut yields. Therefore, design and experiment on plastic film collector of ridged peanut means a great deal to us. The collecting film teeth residue plastic film collector of ridged peanut was designed, and the whole structure and working mechanism of the machine were introduced. Therefore, the main operation components of it were designed and the structure parameters were determined at last. To solve the problem of residual film recycling after peanuts harvest, we designed the plastic film residue collector, and then optimized its parameters. The key structural parameters were determined by mechanism analysis and tests. The collecting film teeth diameter of the first row, the second row, and the third row were set as 10, 8 and 8 mm, respectively. The harrowing tooth was made of No.65 manganese steel, and the harrowing tooth's lug angle ranges from 10° to 35°. The collecting film teeth space on the first row, the second row, and the third row were 120, 100 and 80 mm, respectively. The four-dimensional slice of MATLAB and response surface analysis was done on the machine speed, the harrowing tooth's lug depth and its radius of curvature. The quadratic regression model between film removing ratio and machine operating speed, the embedded depth of the rake, tooth curvature radius was built. The optimal structure parameters of plastic film residue collector were obtained by response surface analysis. The response surface analysis of the model was optimized, and the effect of 3 factors on the recovery of the residual membrane was significant. The order of strength is: machine operating speed> embedded depth of the collecting film teeth > collecting film teeth curvature radius. The machine was optimized by parameter optimization. The machine operating speed, depth of collecting film teeth, tooth's radius of curvature of machine was 1.2 m/s, 11mm, and 222 mm, respectively. And film recycling rate was about 93% through the field test. Its relative error was 2% compared with the predictive value. In conclusion, the optimization scheme was feasible. This paper could provide theoretical basis for optimization of related machines. With the preliminary experiment, the collecting film teeth residue plastic film collector of ridged peanut has good film quality, which meets the design requirements of plastic recycling machine. Removing mechanism on the collecting film teeth residue plastic film collector of ridged peanut is the further research. [ABSTRACT FROM AUTHOR]

Ride comfort is of great importance feature for the heavy truck, its optimization can improve the driver's driving conditions to reduce fatigue, and make the goods safer. Primary factors that can influence ride comfort are form and parameters of suspension, which are suspension stiffness, suspension damp and their combination. When the form of suspension is confirmed, more reasonable parameters can be selected by optimization method to improve ride comfort. Ride comfort optimization analysis belongs to the combinatorial optimization problem, at the same time, the nonlinear characteristics in optimization is essentially a nonlinear multimodal optimization problem. In this paper, at first, a nine degree of freedom vehicle vibration model was established; Vehicle driver seat acceleration simulation tests were conducted with different vehicle speed. Also, both time and frequency domain analysis was implemented with MATLAB software development platform. On the whole, with the increase of the speed of the vehicle, the acceleration root mean square of vehicle driver seat became larger, so the vehicle ride comfort performance reduced. Especially at low speed and high acceleration change is more obvious. But in 40~80 km/h, the acceleration change quite gentle. That means to achieve the better economy and the vehicle ride comfort performance, the vehicle speed keeping in a medium speed is better. Based on C level road and the speed of 70 km/h, with an eight by four dump truck as experimental object, the ride comforttests were conducted, moreover the test results compared with the results of simulation. The compared results showed that the simulation and the test were very close. And then, today technology was coming to a stage of intersection, infiltration, and interaction with multi subjects. More and more issues on complexity, non linearity, and system have come to us. To deal with such complexity of system, conventional techniques have become incapable, and to seek an optimization algorithm, which adapt to large scale parallel with intelligent characteristics, has been a primary research target of related subjects. The artificial fish algorithm was proposed to optimize ride comfort. The artificial fish swarm algorithm (AFSA), anew method based on animal behaviors and the typical application of behaviorism artificial intelligence, was proposed byan internal scholar in recent years. It used the operators such as prey, swarm, follow and random behavior. The algorithm parameters, such as population, step size, sense of distance, the largest try number, crowded degree coefficient and the largest number of iterations, has a great impact on the performance of the convergence. At the end, the artificial fish algorithm was used to optimize ride comfort by reasonable selection of the suspension parameters. The objective function was the acceleration root mean square of vehicle driver seat to be minimized. The decision variables were front suspension stiffness and damp. Moreover AFSA need to set up the appropriate algorithm parameters. For example, population scale, step size, sense of distance, the largest try number, crowded degree coefficient and the largest number of iterations was 100, 100, 20 000, 100, 9 and 50. Where the population scale N was called the number of possible values of suspension parameters within the value range, step size was suspension parameters increasing or decreasing the amount of each iteration, and sense of distance visual was variables scope of each iteration. Optimization results show that the acceleration root mean square average fell by 16.82%, the biggest fell by 21.24% in 60 km/h, so it effectively improves the ride comfort h performance of heavy vehicles. [ABSTRACT FROM AUTHOR]

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Copyright of Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)