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针对在模型预测控制中模型失配较严重时,单独使用动态矩阵控制不能满足控制需要的问题,提出了融合闭环反馈机理的多变量预测控制策略。讨论了多输入多输出系统中输入和输出的配对问题,以及控制算法中的PID控制强度问题,在动态矩阵控制的基础上引入PID反馈,利用动态矩阵控制算法的鲁棒性强及PID控制算法抗干扰性能好的优点,极大地弥补了模型失配的影响。通过对一个经典两输入两输出控制问题的仿真,表明该控制策略具有明显优于单独的DMC控制的性能。
Aiming at the problem that the dynamic matrix control alone can not meet the control requirements when the model mismatch is more serious in the model predictive control, a multivariable predictive control strategy based on the closed-loop feedback mechanism is proposed. This paper discusses the matching of input and output in multi-input multi-output system and the problem of PID control strength in the control algorithm. Based on the dynamic matrix control, PID feedback is introduced. The robustness of the dynamic matrix control algorithm and PID control algorithm The advantages of good anti-jamming performance, which greatly make up for the impact of model mismatch. The simulation of a classic two-input / two-output control problem shows that the control strategy has better performance than single DMC control.