啤酒糖化温度DMC-PID预测控制方案

Study of DMC-PID Predictive Control of the Saccharification Temperature of Beer

啤酒糖化温度对象具有大惯性滞后,工艺要求该参数要快速跟踪工艺设定且无超调,常规PID算法显然难以满足这些需求。针对加热蒸汽压力频繁波动的特点,将预测控制算法与串级控制相结合,设计了糖化温度DMC-PID串级控制系统。仿真结果表明,该系统与常规PID控制系统相比既具有较好的随动跟踪性能,又无超调,且具有较强的抗干扰性。

The beer saccharification temperature plant has great inertia, and the technology needs its control track the set curve fast with non-overshoot. The normal PID algorithm apparently can＇t satisfy the demands. According to the frequent wave Of heating steam pressure, saccharification temperature DMC-PID cascade control system is designed by combining the Predictive Control algorithm and cascade control structure. The simulation shows that the system has not only faster follow-up tracking capability, but also non-overshoot and stronger disturbance suppressing, compared ,with the normal PID control.