Research On Bilateral Drive Control Strategies And Simulation Of Electric-drive Dozer

Bulldozer occupies an important position in the field of mechanical engineering,as our country is advocating energy conservation, traditional bulldozers have lowerenergy use, cannot reach the requirements of environmental protection. For their ownsurvival and development, many bulldozer manufacturers began to study new formsof transmission, electric-drive technology is one important direction. In this paper,combined with the actual research of our project research group, the electric-drivebulldozer has been studied, main contents and conclusions are as follows:1Introduced the background and significance of the topic, the developmentprocess and the research status of electric-drive tracked Vehicle was briefly illustrated.Compared with foreign countries, the level of domestic research is lower, but alsoachieved some results.2. The drive structure of electric transmission was compared and analyzed, thebilateral independently drive structure was chosen. In addition, according to the fea-tures of electric-drive bulldozer, the dynamic model control-oriented was established,and chose the both sides of the motor torque as input of the model, the preliminarysimulation was carried out, the results showed that the model can better reflect themovement characteristics of the tracked Vehicle, laid the foundation for subsequentresearch.3. For the nature and characteristics of electric-drive bulldozers’ dynamics con-trol, according to the different interpretations of driver’s input information in the dy-namics control, the dynamics control scheme based on speed control and torque con- trol was determined, and two control strategies were compared and analyzed.4. Studied the control strategy based on the speed regulator, the drive motormodel and the bulldozer’s final drive model was established in Simulink. Theclosed-loop of motor speed was introduced, adopted PID algorithm to control theoutput of motor torque. Then the driver’s input signal was defined in Stateflow, thebulldozer’s driving control logic was written in Stateflow, at last the Vehicle modelincluding the driver’s input signal was obtained, and use the model to simulate andanalyze different operating conditions of bulldozer. Simulation results showed thatthe driver’s input signal can be well explained in the dynamics control strategy basedon the speed adjustment, the Vehicle control effect was good, the correctness and fea-sibility of the control strategy based on the speed controller was verified.5. The feasibility of torque regulator was analyzed, designed and established themodel of dynamic control strategy based on the torque regulator. The driver’s inputsignal was defined, and the Vehicle model including the driver’s input signal was es-tablished. Using this model to simulate and analyze two working conditions of thebulldozer, the simulation results showed that dynamics control strategy based on tor-que regulator was feasible.6. At last, the full contents of the paper was summarized, drew some conclusions,and made some recommendations for further research of the electric-drive bulldozers.