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ESP(Electronic Stability Program)是现代汽车主动安全领域研究的热点,也是汽车底盘控制研究的重点.汽车ESP系统是复杂的非线性系统,难以建立精确的数学模型.模糊控制器可以有效避免传统PID控制理论的缺陷,但是其动态性能较差,稳定性不足.该文在总结两种控制器优劣的基础上,对模糊控制器进行改进,设计了模糊PID控制器.在极限工况下对控制器的有效性进行了仿真验证,并将两种控制器的控制结果进行了对比.结果表明:模糊PID控制器对提高控制器稳定性有明显效果.
ESP (Electronic Stability Program) is the hot spot in the field of active safety of modern automobiles and also the research focus of the automobile chassis control.A car ESP system is a complex nonlinear system, it is difficult to establish an accurate mathematical model.Fuzzy controller can effectively avoid the traditional PID control Theory, but its dynamic performance is poor and the stability is not enough.This paper, based on the summary of the advantages and disadvantages of the two kinds of controllers, improves the fuzzy controller and designs a fuzzy PID controller.Under the limit condition, The effectiveness of the controller is verified by simulation and the control results of the two controllers are compared.The results show that the fuzzy PID controller has obvious effect on improving the stability of the controller.