模糊PID控制在底盘测功机中的应用研究

Application Research of PID Control in the Chassis Dynamometer System

底盘测功机是一个复杂的时变非线性、大惯性系统,传统的PID控制对于非线性、时变性的系统难以达到控制精度的要求,而模糊PID控制具有在线自动调整的功能,从对传统的PID与模糊PID比较的基础上。分析了参数对系统性能的影响,并利用MATLAB软件中的模糊工具箱对连续系统进行了仿真,仿真结果表明,模糊PID控制器具有良好的跟踪性能,超调量小、控制精度高、调节速度快,可以实现对PID参数的最佳调整。

The chassis dynamometer is a complex nonlinear and time—varying inertial system.It is dificult for traditional PID control to meet the requirements of precision and it is not fit for nonlinear time-varying system and fuzzy PID control has the function of on-line automatic adjustment.In this paper,we make the comparison of the traditional PID and fuzzy PID,and analysis parameters on system performance,and take advantage of the fuzzy toolbox in MATLAB software for continuous system simulation,and discrete system using programming simulation.Results of Simulation show that the fuzzy PID controller has good tracking performance,smaller overshoot control,higher precision speed adjustment,These performances can achieve the best adjustment of the PID parameters.