关键词: 电动助力转向系统, 线性变参数, H&infin, 控制, 硬件在环

Abstract:

A LPV model of EPS system and two DOF vehicle mode  were built and the  LPV/H∞ robust controller was designed, the parameter perturbation of EPS was considered how to impact its performance;the adopted control method was simulated based on MATLAB software and the results indicate that the LPV/H∞ control method has better robustness compared with general H∞ control method, which can enhance the power-assisted ability and the road feel of the steering system and improve the vehicle handling and stability. The EPS hardware in loop test bench was built based on LabVIEW PXI system, the hardware in loop test of LPV/H∞ control method was realized based on conjugate gradient method, and the results indicate that the adopted control method is validity.

Key words: electric power steering(EPS) system;linear parameter varying(LPV);H∞ , control;hardware in loop