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非线性PID控制算法是一种利用非线性跟踪微分器和非线性组合方法对线性PID控制进行改进的新型控制策略,具有不依赖被控系统模型的特点。作者将这种控制算法用于机车防滑装置中,并基于SIMULINK对其进行仿真。结果显示,PID控制器简单,但在初始阶段的车轮锁死现象,会使车轮控制器的性能大打折扣;NPID控制器停车距离短,车轮转速响应快,参数易整定。
The nonlinear PID control algorithm is a new type of control strategy that improves the linear PID control by using nonlinear tracking differentiator and non-linear combination method. It has the characteristics of not depending on the controlled system model. The author uses this control algorithm in a locomotive anti-skid device and simulates it based on SIMULINK. The results show that the PID controller is simple, but the wheel lock phenomenon in the initial stage will greatly reduce the performance of the wheel controller. The NPID controller has a short parking distance and fast wheel speed response, and the parameters are easily settable.