两种过热汽温预测控制方法的性能对比分析

Performance Comparison between Two Predictive Control Methods for Superheated Steam Temperature

文章选取过热汽温作为被控对象,采用DMC和GPC两种典型预测控制算法分别对其进行控制。首先简单地叙述了这两种算法的原理,然后利用MATLAB软件编写程序进行仿真。根据仿真结果,讨论了各控制参数对系统的影响,并且对DMC和GPC在模型失配时系统鲁棒性进行了比较。结果表明,增益失配比例在一定范围内,GPC可以迅速使系统达到平衡;在时间常数失配的情况下,DMC比GPC具有更好的适应性。

Superheated steam temperature is selected as the controlled object,in this paper and two typical predictive control algorithms,DMC and GPC,are used to control it respectively.Firstly,the principle of these two algorithms is briefly described,and then MATLAB software is used for simulation.According to the simulation result,the influence of various control parameters on the system is discussed,and the system robustness of DMC and GPC in model mismatch iscompared.The results show that in the case of gain mismatch,GPC can quickly balance the system.In the case of time constant mismatch,DMC has better adaptability than GPC.