非自衡系统和不稳定系统的预测函数控制

Predictive functional control for integral and unstable system

针对非自衡系统和开环不稳定系统,结合预测函数控制、串级调节和PID控制三者的优点,提出了一种PFC—PID控制策略:内回路采用PID控制使对象稳定且快速消除内扰,外回路采用PFC控制,PFC的强鲁棒性保证了在对象特性变化的情况下仍然获得良好的调节品质。仿真结果显示了该控制策略的有效性。

In view of integral system and unstable system, based on the merits of Predictive Functional Control (PFC), cascade control and PID control, a PFC-PID transparent control strategy is presented. PID control is used in inner loop to stable the controlled plant and to overcome the disturbance quickly, PFC algorithm is adopted in outer loop which takes the PID controller and controlled plant as a generalized controlled object. The strong robust stability of PFC guarantees good regulating performance while controlled plant varies. Computer simulation results shows that the control strategy is effective.