最优整定PID控制在工业液压系统中的应用

Application of PID Control in Industrial Hydraulic System

针对液压位置控制系统,提出了几种最优整定控制器设计方法,通过对系统的分析,建立了系统的非线性动力学模型。为了克服液压系统的死区问题,提出了一种死区逆的非线性PID控制方案。设计了一种最优PID控制器以满足特定的时域性能要求,提出了一种在系统动力学是时变的情况下也能提供最优PID参数的最优整定PID控制方案。为了在实际中安全地实现最优整定控制,集成了一种控制性能预测策略。

For the hydraulic position control system,several optimal tuning controller design methods are proposed.Through the analysis of the system,the nonlinear dynamic model of the system is established.In order to overcome the dead time problem of hydraulic system,a nonlinear PID control scheme with inverse dead time is proposed.An optimal PID controller is designed to meet the specific time-domain performance requirements,and an optimal tuning PID control scheme is proposed to provide the optimal PID parameters when the system dynamics is time-varying.In order to realize the optimal tuning control safely in practice,a control performance prediction strategy is integrated.