纯滞后串级控制系统的两级Smith预估补偿

Two Level Smith-predictors for Cascade Control Systems with Time-delays

对副环中含有大滞后的串级控制系统,提出了两级Smith预估补偿的控制方法。其一,在副回路中加入Smith预估器将滞后提到副环的外部;其二,在主回路中再加入Smith预估器消除滞后对整个系统的影响。仿真结果表明,采用该方法将将使系统的性能指标显著提高。

A two level design method of Smith-predictors for cascade control systems with time-delays is presented. The first step is to add a Smith-predictor in the inner loop of the system to take the time-delay term out of the inner loop. The second step is to add a different Smith-predictor in the main loop of the system to take the time-delay out of the main loop. The simulation shows that the two level design method is implemented and has a better control effect.