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针对污水处理系统中溶解氧大时滞的精确模型难建立,且缺少有效控制等问题,提出了一种以动态矩阵为基础的自适应预测PID控制方法,以此达到控制溶解氧的目的。该算法建立了溶解氧控制的广义被控对象的预测模型,并在对溶解氧控制滚动优化中考虑能耗经济优化因素,利用反馈校正调整模型预测误差,从而有效克服了溶解氧大时滞的精确模型难建立等问题。仿真试验表明,与PID控制相比,所设计的控制算法能改善系统的动态性能,鲁棒性更强。工程模拟调试也验证了该控制策略的可行性。
In order to solve the problem that the precise model of large dissolved oxygen delay in sewage treatment system is difficult to establish and lack of effective control, an adaptive PID control method based on dynamic matrix is proposed in order to control dissolved oxygen. The algorithm establishes the prediction model of generalized controlled object with dissolved oxygen control, and optimizes the optimization of energy consumption in the rolling optimization of dissolved oxygen control, and adjusts the model prediction error by feedback correction so as to effectively overcome the large delay of dissolved oxygen Precise model difficult to establish and other issues. The simulation results show that compared with PID control, the designed control algorithm can improve the dynamic performance of the system and is more robust. Engineering simulation debugging also verified the feasibility of this control strategy.