A method of wheel load variation simulation for automobile ABS performance test bench is presented in the paper. To simulate the wheel load variation of the detected vehicle, the wheel placement angle on the rollers can be changed by adjusting the wheelbase between the ABS performance test bench’s two rollers, which support the same wheel. Equivalent wheel load is defined to reflect wheel load variation simulation, and the relationship among the equivalent wheel load, roller adhesion coefficient and wheel placement angle is also be analyzed. The simulation results show that the equivalent wheel load is not only can greater than wheel load many times, but also can less than wheel load. The minimum equivalent wheel load is determined by the critical wheel placement angle.
In this paper, through analyzing the generating mechanism of automobile steering resisting torque, we build MATLAB/SIMULINK torque simulation model and get the steering resisting torque under different working conditions. And the results show that the model has a higher accuracy through comparing it with actual measured steering resisting torque. Design and set up the experiment platform composed of three parts including steering system, control system and torque loading device. Based on the data of steering resisting torque obtained from the model simulation, we manipulate torque loading device to input a certain of resistance for steering system ,thus to realize accurate simulation of various steering condition on test platform ,which has paved the way for the development and debugging of EPS controller.
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