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A 3D cell-based finite element model is employed to investigate the dynamic biaxial behavior of cellular materials under combined shear-compression. The biaxial behavior is characterized by the normal stress and shear stress, which could be determined directly from the finite element results. A crush plateau stress is introduced to illustrate the critical crush stress, and the result shows that the normal plateau stress declines with the increase of the shear plateau stress, which climbs with the increase of loading angle. An elliptical criterion of normal plateau stress vs. shear plateau stress is obtained by the nonlinear regression method.

The modified Reynolds equation for power-law fluid is derived from the viscous adsorption theory for thin film elastohydrodynamic lubrication (TFEHL) of circular contacts. The lubricating film between solid surfaces is modeled as three fixed layers, which are two adsorption layers on each surface and a middle layer. The differences between classical EHL and TFEHL with non-Newtonian lubricants are discussed. Results show that the TFEHL power law model can reasonably calculate the pressure distribution, the film thickness, and the velocity distribution. The thickness and viscosity of the adsorption layer and the flow index influence significantly the lubrication characteristics of the contact conjunction.

Using advantages of PLC, SCADA, inverter, bus and internet in industrial production, in order to cope with the characteristics of large number of motor, complex sequential logical, high drive control demanding and distributed in different territory, it designs a configuration monitoring system for motor group integrative management and control network system, which uses PPI protocol and USS protocol and fieldbus technology, configuration monitoring technology and network technology, etc. It can realize the effective management of large number of motor driving and control. Due to its function quite similar, S7-200 and S7-300 and MM440 in the paper can be replaced by other kinds of PLC and inverter on the market. So the control scheme proposed by this paper is more practical and universal. Application in textile printing and dyeing institutions multi-cell motor driving, it shows that the designed system can drive and control the motor group with high efficiency and reliable.Keyword:largenumberofmotor;motorgroupnetwork;driveandcontrol;inverter;PLC-SCADA.

Anchorage location selection is one of important factors concerning the safety of vessel in the Yangtze river. On the basis of the characteristics of the inland ports and channels, this paper fully considers the safety of anchoring vessels, the surrounding facilities and the vessels sailing nearby, refines the influence factors of anchorage location selection in the Yangtze river, analyses the influence factors individually, evaluates comprehensively influence factors of the Yangtze river anchorage location selection by using the multi-objective optimization method, constructs the Yangtze river anchorage location selection comprehensive evaluation model, and gives an example of anchorage location selection in Ezhou port as application instance. The establishment of the model enriches the theory related to inland river anchorage, provides theoretical guidance for the Yangtze river anchorage location selection.

Segment floating is a common problem met in the construction of large-diameter crossing-river shield tunnel. The factors affecting segment floating are discussed first and analyzed by numerical simulation, including the properties of grouting material, the speed of shield tunneling, grouting pressure difference, the tunnel longitudinal stiffness, frictional force between segment rings and weight of the supporting system. The simulation results indicate that segment floating will reduce by shortening slurry’s initial solidification time, slowing shielding speed, improving the tunnel longitudinal stiffness as well as increasing the frictional force between segment rings. And some measures are given such as applying new rapid-setting slurries, shear pins, rubber mats with high friction coefficient and pre-stressed bolts

A viscous fan clutch with double grooves is taken as a studying example for measuring its slip and surface temperatures. The grooves between driving and driven plate of the viscous clutch are filled with silicone-oil in this study. Experimental methods and test rig to measure the slip and surface temperatures for a viscous clutch are discussed. The relations of the clutch slip and clutch surface temperatures with the change of the input speed are measured.

In system of cetyltrimethylammonium bromide (CTAB), tetraethyl orthosilicate (TEOS) and sodium hydroxide, the mesoporous sieves MCM-48 with hetero atom could be synthesized by adding different aluminum and titanium sources. The results showed that M41S family of hexagonal (MCM-41), cubic (MCM-48) and lamellar phase (MCM-50) could be synthesized respectively through hydrothermal method by adjusting the alkalinity in synthesis gel exactly.

According to the problems that there are less distribution transformer state variables and the condition assessment of distribution transformer carry out difficultly, a method of distribution transformer condition assessment based on core state variables is presented. The initial results of distribution transformer condition assessment are obtained by using core state variables. Then through calculating the sensitivity of the non-core state variables to the evaluation results, the initial assessment results are modified to ensure more accurate results.

Currently, maritime safety administrations or shipping company had received a large number of vessel trajectory data from Automatic Identification System (AIS). In order to more efficiently carry out research of maritime traffic flow, ship behavior and maritime investigation, it is important to ensure the quality of the vessel trajectory data under compression condition. In classic Douglas-Peucker vector data compression algorithm, offset spatial distance of each point was the single factor in compression process. In order to overcome the shortcomings of classic Douglas-Peucker, a vessel trajectory multi-dimensional compression improved algorithm is proposed. In improved algorithm, the concept of single trajectory point importance which considers the point offset distance and other vessel handling factors, such as the vessel turning angle, speed variation, is proposed to as the compression index. Compared to classic Douglas-Peucker algorithm, experiment results show that the proposed multi-dimensional vessel trajectory compression improved algorithms can effectively retain characteristics of navigation.

With the rapid development of Smart Grid, multiple services such as power distribution automation, automatic measurement, user data collection, demand for a reliable, efficient and robust communication network. LTE Private wireless network stands as one promising solution due to its broad bandwidth, low delay, ease deployment and wide coverage, etc. This paper introduces a centralized architecture for the implementation of LTE private wireless network in smart grid communication network. The architecture utilizes the existing optical resources including MSTP/SDH in power grid to facilitate the deployment of private wireless network. Architecture principle and module designs are presented, illustrating an example of applying the centralized architecture into practical implementation.

Concerning the communication infrastructure pertinent construction guidelines, China South Power Grid (CSG) has clearly defined and detailed the data network equipment quality control, test and check. This paper proposes two indicators to monitor the power distribution automation in LTE private wireless network. The first one is the distribution online ratio (DoR), which evaluates the effect of distribution automation infrastructure construction. The second one is distribution tunnel integrity ratio (DiR), which reflects the availability of distribution automation communication tunnel. Furthermore, an indicator computing assistant (ICA) is developed to collect the data of two indicators transmitted by the large number of custom premise equipment (CPE) in LTE private wireless network in a computationally efficient way, which frees the conventionally demanding human and computing resources..

The ship power system is a complex system with time varying, nonlinear and strong coupling characters. The traditional PID controller is difficult to meet the requirements of the system.In this paper, a multiple models fuzzy PID controller is designed. Considering the different operating conditions of on-land ship power system, two excitation regulation model which respectively corresponds to a fuzzy PID controller are set up. Each time, based on the input operation condition tested, only one fuzzy PID Controller is chosen to improve the control precision. At the end, simulation results show that multiple model fuzzy PID controller is superior to the single fuzzy PID controller, which effectively improves the transient response of the system, the steady state accuracy and robustness, having good prospects for engineering applications.

Campus energy consumption takes up a large proportion of the total expenses of the campus. At the same time power consumption is emphasis. In the paper design of campus energy monitoring system and key technologies are demonstrated. The above-mentioned scheme is applied in a university in the north of China. The energy-saving measures are studied combined with the characteristics of the specific energy consumption.

In this paper, a simulation model for the propagation of transformer PD pulse has been constructed,and the propagation of PD in a real substation were investigated. We also studied the frequency characteristics of currents at different detection positions, and the influences of substation network are analyzed in aspects of system resonant frequency. The optimal detection position and the optimal measuring band are proposed. The results show that, the calculated range of substation network and capacitive apparatus play the key roles in impedance characteristics.

By analyzing the priority arbitration bit by bit without destroy in can bus rule, the article elicits the conclusion that if static priority based on the affirmatory system model is used, the lower priority’s messages will be much more delayed, even lose some data when the bus’s bandwidth is widely used and scheduling can’t be modified during the system. The dynamic priority promoting method and math model of SQSA and SQMA is achieved in the article, it analyses the model’s rate of taking in and sending out in large quantities, the largest delay, the problems and solutions when using SQMA. In the end, It is validated that the method of improved dynamic in the article has good performances on the network rate of taking in and sending out in large quantities, the average delay and the rate of network usage by emulational experiments.

In this paper, taking Luoyang city as an example, research the problem of population system based on the entropy method in the urbanization process. First, access to date of statistical yearbook, we choose 8 indexes to construct the evaluation of development level of population urbanization. Then, using the entropy method to determine the weight of each index, a multilevel fuzzy comprehensive evaluation model is built to evaluate on this change between the urban and rural in population system. The results show that the level of urbanization of this city is currently in the conversion process from the second grade to the third.

In this paper, squeeze casting process was adopted to produce the Fe-Cr-Ni preform reinforced Al-Si-Cu-Ni-Mg aluminum composite. And then, T6 heat treatment was conducted to enhance the composite’s performance. After which, isothermal compression tests in temperature range of 473-773 K at an interval of 150 K and strain rate range from 0.001 to 10 s-1 were carried out on Gleeble 3500 thermo-mechanical simulation machine. It is found that, for a specific strain rate, the flow stress decreases markedly with temperature increases. And for a fixed temperature, the flow stress generally increases as the strain rate increases. Based on the experimental true stress-true strain data, the Arrhenius type model was established.

Steady state responses of a circular cavity and a semi-circular canyon subjected by plane SH wave in an elastic quarter are presented by using Fourier-Hankel wave function expansion method and image method with Fourier series expansion on the boundary conditions to determine linear algebraic equations of unknown wave function coefficients. Especially, displacement and stress component expressions are formulated for incident, reflected, scattering waves, respectively. This method can provide an analytical ideas and methods for further studies of elastodynamic interface problems.

Main control valve is the key component of the hydraulic system, the valve value accounts for about 30% of machinery hydraulic system. The regenerative repair of main control valve was completed by adopting grinding, electroplating and other relatively simple process. So, process is easy to operation and implementation, the maintenance cost and waste of resources is decreased, and repair effect is good. The service life of main control valve regenerated by using this technology can reach or exceed the service life of new one.

With the study of a certain servo gear transmission system, a three-dimensional parametric design of servo drive system is made based on SolidWorks and its plug-in GearTrax. The model is introduced into ANSYS through a special interface, and the finite element modal solutionsare obtained. Aiming at solving the practical problem that the static linear modal analysis methods fail to meet the working conditions of high speed rotation and frequent variable speeds, this paper proposes an effective way of determining the range of the system natural frequency through figuring out the natural frequencies in two critical states. Thus, it provides an important basis for the credible design of the servo drive system and a reliable theoretical guidance and reference data for its design, use and maintenance.

This paper, a new class of augmented Lagrange functions with the new NCP function is proposed for the minimization of a smooth function subject to inequality constraints. Under some conditions, we prove of the equivalences of the KKT point and local point and globe point between primal constrained nonlinear programming problem and the new unconstrained problem. By the character of augmented Lagrange function, the algorithm which uses alternating direction method is constructed and proved convergence.

Fe-Cr-Ni preform reinforcing aluminum composite was produced by squeeze casting. And then, T6 heat treatment was conducted to enhance the composite’s performance. After which, isothermal compression tests in temperature range of 298 - 473 K at an strain rate range from 0.001 to 10 s-1 were carried out on Gleeble 3500 thermo-mechanical simulation machine. It is found that, for a specific strain rate, the flow stress decreases markedly with temperature increases. And for a fixed temperature, the flow stress generally increases as the strain rate increases. Based on the experimental true stress-true strain data, the Arrhenius type model was established.

In this paper, hardware and software of the central air-conditioning control system is researched by STC series of enhanced 8051 microcontroller. The STC11F 08XE is the main control of the hardware part. Temperature and humidity sensor regulating valve and all kinds of motor are used as external equipment to complete the temperature and humidity of building the internal control of central air conditioner. In terms of software, the program is described by protel99SE software. Microcontroller program is compiled by Microcontroller development tools keil u and STC-ISP. The temperature and humidity control and optimization of central air conditioning are completed by PID parameters. Infrared control unit is operated and liquid crystal is displayed to show the operation results.

With the development of Internet technology and the increasing popularity of the Internet, the amount of information data of enterprises increased sharply. How to avoid unexpected data corruption and to improve the system of data security and data recovery capabilities has been the focus of attention of users and enterprises. Regular backups of the database is to restore the data the easiest and most effective guarantee method and is an effective measure database administrators to manage data. This paper proposes a plan of database scheduled tasks based on Linux environment. This plan can be timed to export the database, be sent automatically to a secure backup mailbox and complete the regular backup of the database finally.

For the implementation of digital multimedia communication, an efficient, reliable, deterministic transmission system plays a vital role. Quadrature amplitude modulation (QAM) is commonly used in digital communication systems. We focuses on simulation and analysis of M-level QAM by using MATLAB in this paper.

We investigate the output characteristics of Smith-Purcell free electron laser based on an all-feedback resonator by theoretic analysis and particle-in-cell simulation method. The simulation results show that the output power spectrum density is different with different azimuthal angle range in this device. The output power spectrum density on azimuthal angle curve is a nonlinear curve. This output characteristics is important to design the port of this device.

To reduce labor intensity and production cost, improve labor productivity and product quality , we design the fruit picking robot. In this design, we use the hydraulic shear elevator which is drived by vertical fixed fork, supplemented by servo hydraulic cylinder to achieve the function of lifting work platform. Also we use the worm and worm wheel structure to adjust the steering arm. I pick the hydraulic push rod to drive slide rail. I also use slider-crank mechanism to drive manipulator to achieve the function of shearing.

Adaptive optics (AO) is the primary means of improving the light transmission quality and easing the optical turbulence in communication. In laser intensity/direct demodulation (IM/DD) optical communication system, the function of AO correction for improving the optical communication performance is analyzed, adaptive optics (AO) compensating effects of atmospheric turbulence is studied by simulation and experiment in our adaptive optics system test bed. And 2.5 GB/s optical communication system performance is improved by AO compensating effects. So signal noise rate (SNR) and bit error rate (BER) of laser communication are improved.

This paper presents a control scheme for the synchronization of switched chaotic systems. The general case that the error state information between master and slave chaotic systems is not available for design the controller, an adaptive observer-based error system is constructed and the controller is designed. Utilizing common Lyapunov function method, a synchronization criterion is given. Simulation shows the effectiveness and efficiency of the proposed scheme.

Through the analysis of processing 3D point cloud data obtained by laser radar and establishment of the point cloud model to calculate the volume and displacement to monitor the particular scene in accordance with the detection strategy of the dangerous situation, This article wants to develop a set of all-weather, real-time early monitor system, in order to timely risk information publish, reduce the losses caused by disasters. The system uses a modular design approach, which is divided into the information collection module, the information processing module, the analysis of early warning modules and information transmission module. The paper details the system design, and application in the design and implementation of technology and point cloud data processing algorithm. The system use serial programming techniques for laser radar data and control PTZ, and multi-threading technology to improve the efficiency of the serial communication and resolve the problem of multi-serial real-time data collection.

The calculation of sliding cable is difficult because it can dynamically pass through prescribed nodes and the length is variable. In order to solve the above problem, a calculation method based on tension distribution and temperature compensation for sliding cables was put forward. At first, the sliding cable was supposed to be fixed cable and the internal force of each cable segment was calculated. Then, the unbalanced tensions between neighboring cable segments were distributed to make the tensions equal. And then different temperatures were applied to the corresponding cable segments, which could cause temperature stress to compensate the unbalanced tensions between the initial calculated tensions and distributed tensions. At last the calculation was carried on again after applying the temperature to each cable segment. Moreover, an example was presented to verify the precision and validity of this method. The results show that the calculation method based on tension distribution and temperature compensation for sliding cables is effective.

Nanometer titanium dioxide has not only small size effect, quantum dimension effect, surface and interface effects and macroscopic quantum tunnel effect, but also photocatalytic effect. Vac-acrylate emulsion is one of the important emulsion adhesive. It has good properties for coating, high cohesive strength, no pollution. It has the special functions with few nano-TiO2.In this paper, method of modification about nanometer TiO2was introduced via cellulose sodium. The modified nanometer titanium dioxide was added to the material of the preparation of acrylic emulsion including vinyl acetate, butyl acrylate, acrylic acid and methyl methacrylate to synthesize composite of nano-TiO2/vac-acrylic emulsion. According to the performance analysis of solid content of emulsion and stabilization, we can find that when the use level of dosage, emulsifier, nano-TiO2is 0.5%, 3.2%, 0.7%, and emulsion has the best combination property.

A continuous pressure measurement method is proposed based the pulse image sensor and BP neural network for continuous measurement of arterial blood pressure. The multi-information synchronous acquisition system is built to collect pulse image sequences, sphygmopalpation pressure, probe internal pressure, and blood pressure of subjects. The feature vector is formed from pulse image sequences, sphygmopalpation pressure, and probe internal pressure to predict continuous blood pressure by BP neural network. The results show that the mean difference (MD) and standard deviation (SD) of systolic blood pressure (SBP) and diastolic blood pressure (DBP) meet the standard of Association for the Advancement of Medical Instrumentation (AAMI). The method could be used to predict continuous blood pressure and provides a new method for arterial continuous blood pressure measurement.

This paper mainly investigate how to use cheaply-priced, safety and sanitate of natural clay or nanosilica as coagulant and adsorbent combined with polyaluminium chloride to treat low temperature and low turbidity water .Wastewater in paper mill was used as the water samples, by measuring the absorbance and the turbidity of the water samples to determine the flocculation effect. The results showed that flocculation effect of water samples with different natural clay and nanoSiO2combined with PAC had the same change tendency. The order of coagulation effects was bentonite > diatomite > kaolin > attapulgite. nano-SiO2as coagulant associated with PAC could attain best coagulation effect with least amount from the analysis of absorbance or turbidity.

Natural Gas Hydrate has become a research focus at home and abroad at present. This paper expounds the concept of natural gas hydrate and its types. Analyze its study process and research situation, and make a brief description of its distribution, mining and related environmental problems by tracking the discovery history of gas hydrates. Then put forward the problems in instant need of solving and the key research contents.

The experiments of a five-story steel frame on shaking table verify that the slide-roof system can markedly reduce vibration. When the ground motion is strong, the vibration reduction is effective and the influence from the static friction is little. The experiments show that this slide-roof system possesses good robustness to its friction.

Through doing spot monitoring on stability of slope engineering management of Longmenhao Primary School, this paper does analysis on monitoring data for one month. Analysis results show that all of accumulation maximum displacement, change rate of horizontal displacement and accumulation maximum settlement of slope of Longmenhao Primary School do not surpass warning value thus knowing that slope of this section is basically stable which also provides references for stability detection analysis of engineering management.

The construction of stay cable is the key technology problem in large span spatial structures. This paper carried out a study on the construction scheme of stay cables based on the practical project of Shiyan stadium roof. The loss of tensile force caused by the seven steel wring with different construction order is summarized according to the experimental construction, and the tensile force slacken analysis method was used to calculate the stress of construction. Moreover, the loss of tensile force caused by anchor and relaxation is considered too. Then, the control tensile force of construction, which is used to realize the tensile construction one time, is obtained. Results of the engineering test show that the construction process is simplified and he construction scheme is economic under the condition of allowed precision. The method can provide reference for similar projects.

The scattering of time harmonic SH waves by arbitrary positions of circular cylindrical cavity is studied in continuous, homogeneous, isotropic, elastic strip region. In this paper, the completely analytical expression of total wave field is explicitly presented and the dynamic stress distribution is symbolically visualized in the strip region. The total wave field is divided into four sub wave fields, incident wave field and scattering wave field by the upper bound, the lower bound and the cylindrical bound, on big arc supposition. Specific wave functions are employed for each wave field expansion in series, such as circular cylindrical functions, respectively. Corresponding infinite linear algebraic equations are constructed by means of solving coefficients of Fourier series expansion on each sub wave field. Coefficients of cylindrical function expansion of each sub wave field are determined by truncated equations, which are reduced number of coefficients on pre-given computational accuracy. Numerical results graphically describe the dynamic stress concentration factor around the circumference of the cavity and the normalized dynamic stress along the cross section directly above the cavity.

Based on the analysis of the working principle and the failure phenomena as well as their mechanism of a particular type of tracked vehicle hydraulic shift system, a model of the hydraulic system is established using the fluid simulation software AMESim. The responses of the system are then calculated through adjusting some of the parameters of the system and inputting various fault information into the simulation model, so as to find out the correspondence between the dynamic characteristics of the system abnormity and specific component failures. It can be concluded that such simulation can serve as an easy and reliable way to analyze all kinds of fault responses in order to provide a solid reference basis for the fault diagnosis of the actual system.

The paper carries research on the accurate modeling issue for the disabled athletes’ three-dimensional visual gaits. The three-dimensional visual gaits are important gait features when the disabled athletes are walking which have some regularity. However the features present in a mess. The traditional three-dimensional visual gaits model based on visual images don’t consider the messy problems in the gait feature resulting in lower dimensional simulation fidelity. This paper proposes a three-dimensional visual gait modeling method using the human dynamics which can obtain the body features of the three-dimensional visual gaits by analyzing the periodic features of the gaits. The experimental results show that the model can quickly and accurately emulate the three-dimensional visual gaits for the disabled athletes with higher fidelity and lower errors.

In order to improve the efficiency of the coated seed dryers, improve the drying quality and reduce energy consumption, the adaptive control technology of coated seed dryer was studied. Detection system for temperature measuring, material level measuring, and wind speed and direction measuring were fixed on the drying equipment. According to the detected data, the adaptive control system controlled the dryer blade to adjust the temperature and intensity of air intake. This technology accurately controlled the drying air temperature, moisture and moisture content in the seeds. The test results show that the drying efficiency is 1.38 times of the original dryer, while the power consumption reduces to 40.05%, and intake air temperature reduced 19.84°C, which can improve the seed activity.

The tree-like structure is a branch of space bionic structures,belonging to the Bionic Architectural Structures. Cast-steel joints with branches are the keys to build the tree-like structures.They are used widely,and the most common joints in our projects are cast-steel joints with two、three and four branches. The cast-steel joints with two branches are planar,while the joints with three and four branches are spatial.Until now,the basic theoretical researches about the cast-steel joints with branches are also relatively scarce.This paper did researches about mechanical properties, calculation methods and structural optimization of the cast-steel joints with three branches deeply and systematically. The result shows that the bending moment has a big influence on the value of the max stress. And the three main failure modes of the cast-steel joint with three branches are yield of the main tubular along the axial direction, local buckling at the connection of the main tubular and branches, and the tearing out of the branches.

Taking a typical cylindrical solid pier as example, this paper utilizes the way of additional mass to consider the influences of hydrodynamic pressure on piers. It establishes dynamic response comparative analysis of single pier model under different earthquakes’ motivation taking ANSYS finite element software as computing platform. This draws conclusion that hydrodynamic pressure keeps characteristics of changing the seismic response of piers in which pier top displacement and pier bottom internal force are increased. Also it acquires the conclusion that weight and cycle of structure are related to the effect of hydrodynamic pressure. Through analyzing continuous beam bridge and continuous rigid-frame bridge, it is verified that there exists close relationship between effect of hydrodynamic pressure and inherent cycle of structure in which the higher inherent cycle becomes, the lower influence hydrodynamic pressure keeps on structure.

In this paper, the intelligent DNS is introduced to resolve user having slow campus internet speed when access our campus website. Our campus has three exports, connected to the CERNET, the Telecom and the Unicom respectively. The campus website is usually resolves to the CERNET, this led to when user from the other ISP accessing campus website, it need across different ISP, but across different ISP take more time, so resulted in slow speed problem. To solve the problem, we design and implement an intelligent DNS method base on open source software squid and BIND. Practical results show that this method can improve access speed effectively, and enhance the security of website.

Simulated for OFDM system modulated by 16PSK, 16QAM and 64QAM, and then we compared and analyzed their performance in the Rayleigh channel and 2 paths Rayleigh channel. Simulation results show that under the same conditions, Bit Error Rate (BER) of MQAM modulation system is lower than the same order MPSKs

With the development of active noise control technology, ANC system has been gradually introduced into practical application. And some researches and experiments notice that ANC system may encounter with nonlinearity problems under certain conditions in practical applications. The paper analyses and summarizes possible factors that may lead to nonlinearity problems, based on the operation principle and structure features of ANC system, and classifies the main methodologies of dealing with nonlinearity problems considering the main technologies and researches nowadays of system nonlinearity with the same analyzing structure of nonlinearity factors mentioned in the paper. The paper also elaborates the strength and weakness of different methodologies and the most appropriate application condition for each methodology, and it provides theoretical basis for nonlinear active noise control system.

The relationship between small enterprise management innovation and competitiveness is discussed. From the management idea, management system, management strategy, management organization and management culture innovation the small enterprises competitiveness is enhanced. The management innovation is the foundation of the competitiveness.

By introducing construction design thought into practice, the mode is realized and updated under the information environment. The information technology is used as a tool, which also let customers learn with independent inquiry, learn with resources, and collaborative study, so as to cultivate customers ' innovative consciousness, innovative thinking and innovative ability.

According to the switch transients problem existing in the Hybrid Actuation System (HAS), a multi-mode switching control system was proposed. This control system, based on the system feedback correction theory, can cater to the demands of dynamic characteristics and switch transients. To start with, the mathematical model of HAS was established on the basic of HASs operating principle, and the HAS is composed of Hydraulic Servo Actuator (HSA) and Electro-Hydrostatic Actuator (EHA). Further, the different operating modes controller are hammered out by employed the PID feedback correction control, and the acceleration feedback controller is added to the switched system to decreasing the switch transients. Finally, simulation results demonstrate the system is precise in tracking displacement signal, and it is validity of mitigating the switch transients by used method of feedback correction.