Differential Steering Simulation Research Of Tracked Transportation Vehicle

Along with the million killowatts of wind power project established in JingSu Province, mudflat wind power is becoming a characteristic of wind power in China. As a very important part of mudflat, interidal zones undertake the missions of power wind construction. Because of lower ground bearing capacity and regularly tidal fluctuations, transportation and installation of wind turbine in interidal zones becomes the problem around the conner.Due to the low ground pressure hydrostatic driving tracked vehicle will be the main conveyance in interidal zones.Steering has been the primary problem and technical difficulty which hydrostatic driving tracked vehicle faced. A tracked tansportation vehicle produced by DHI·DCW GROUP CO.,LTD is researched in this paper. Mathmatic model arid simulation model are established under MATLAB/Simulink software platform of the vehicle steering procedure, performance parameters variation with the theory speed ratio of steering process are discussed, which will provide theoretical basis for steering control method and control stragegy.First, terramechanics, pump-control-motor system and engine dynamics are analyzed in the paper;Secondly, modules for the three part analyzed are built in MATLAB/Simulink, connecting the modules into a uinfied model through the coupling factors, assigning the simulation parameter according to the real vehilce;Then, using theory speed ratio to analyze the performance parameter during steering process, such as the real track vesolety, rapidity and flexibility of the steering, torque characteristic of hydraulic components, pressure characteristic of closed system, and engine torque consumed. Making comparative analysis to study the effect of the maximum theory speed and vehicle load changing to the performance parameter;Finally, the data acquisition system based on LABVIEW is established to record the parameters of field test, comparing the data collected by the LABVIEW and the rusult by simulation confirmed that the simulation model established in this paper is resonable and reliable.