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Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology 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 Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology 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 various types of error coupling transmission mechanisms and the dimensional tolerance optimization design of multi-faceted shafting assembly are analyzed by taking the multi-faceted shafting assembly as the research object. Monte Carlo method is used to simulate the measured size of assemly ring,and the mean value of radial run-out tolerance and its distribution law are obtained. A prediction method for the radial circle run-out of variable boundary circle is proposed,and the integrated cumulative error including the coaxiality and the matching tolerance of shaft hole is established. This method is extended to the assembly error modeling of complex assembly to realize the prediction of the radial run-out tolerance in the design. With the goal of accumulating the radial runout at the end of the assembly,the average assembly accuracy,assembly reliability,and processing cost are set as constraints,and the optimization of system structure and its component tolerances is performed. Taking the design of a certain type of torque converter as an example,the feasibility and practicability of this method for predicting the cumulative radial run-out tolerance of the shaft system are verified. [ABSTRACT FROM AUTHOR]

In order to study the dynamic matching of hydrodynamic transmission system for armored vehicles, the influence factors of the dynamic matching of high-power diesel engine and hydrodynamic torque converter are analyzed. The reasonable definitions of dynamic matching power and economic indexes of the system consisting of diesel engine and hydrodynamic torque converter are given. A calculation program for dynamic matching performance of diesel engine and hydrodynamic torque converter is established by combining the neural network model of diesel engine based on finite test data with computational fluid dynamics simulation model of converter based on the hybrid flow channel method. The structural factors of influencing the matching performance are analyzed through design of experiment, and the main effect and interaction effect of which the effective diameter of converter and the intermediate drive ratio affect the matching performance are obtained. The influences of throttle opening and torque converter’s locking ratio on the optimal dynamic matching region are also analyzed. The results show that the structural factors are the main factors which affect the dynamic matching performance, and the application factors are the relative secondary factors. However, the application factors can cause a change in the location of optimal matching region and the values of optimal indexes to a certain extent. [ABSTRACT FROM AUTHOR]

Focusing on the hardware and software environment of research platform - Pioneer 3-AT, a binocular stereo vision system was designed combining with the environmental recognition process, the principles and practical application environment. The hardware parameters were determined according to the characteristics of the classic image sensor, the actual demands, the field size to be observed and the required accuracy. Two CMOS cameras were selected, several possible system solutions were established. Among these, a solution was selected based on the experiment requirement. Then a horizontally binocular stereo vision test platform which can put two cameras was designed. Finally the controller - laptop constitution was added, and a complete environment recognition system was formed. Experimental results showed that this test system was very applicable. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology 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 Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology 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 Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology 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 Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology 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 dynamic cushioning properties of locking clutch for a hydrodynamic transmission vehicle are studied to improve the locking quality in the transition process from hydrodynamic transmission operating condition to mechanical condition, in particular, to reduce the impact in vehicle’s locking process.The dynamic models for hydrodynamic torque converter with locking function and its input and output components are established. And the effects of oil-filling, buffer boosting, and step boosting on the locking quality during locking are analyzed. The optimal Latin hypercube design method is used to optimize the buffer slope in the buffer boost stage. The quality evaluation parameters, such as jerk, sliding time and sliding work, before and after optimization are compared using the proposed locking quality evaluation function. A locking characteristic test verification bench was built to verify the locking qualities before and after optimization. The results show that the proposed dynamic system simulation model can be used to accurately predict the dynamic locking process. The locking quality after optimization is significantly improved compared with the result before optimization, and the impact is significantly reduced. [ABSTRACT FROM AUTHOR]