Cao Fuyi

Simulation of Steady Turning Movement Trace of Tracked Vehicle of Double Power Flow Transmission

The turning process of tracked vehicle is the compound movement process. The hydro-mechanical differential turning system is the double power flow turning system of tracked vehicle. Basing on turning kinematics of tracked vehicle and hydro-mechanical differential turning theory, the simulation model of turning movement trace of tracked vehicle of double power flow transmission is established. The model is fit for all movement states of tracked vehicle. The steady turning movement trace of tracked vehicle is simulated and its changing rule is analyzed. The theoretic base that the hydro-mechanical differential turning performance is studied and the turning control system is developed is provided in this paper.

The shift modeling and simulation of Hydro-Mechanical Continuously Variable Transmission of tracked vehicle in turning conditions

With the aim of improving the shift quality of Hydro-Mechanical Continuously Variable Transmission (HMCVT) of tracked vehicle in turning conditions, with the research object of HMCVT of tracked vehicle, after analysis of the transmission structure and its working principle, and combining the working characteristics of the tracked vehicle in agriculture, the simulation model of the shift process of HMCVT is established in the method of according to object oriented by using the software of MATLAB/Simulink. As the example for F4 switching F5, the dynamic characteristics of the shift process of HMCVT are analyzed based on the simulation model, and the turning load in turning process to its shift influences are researched. The simulation results show: the simulation model can effectively simulate the shifting dynamic performance of HMCVT, and the research provides suggestions for improving the shift quality and making the controlling strategy.