摘要
为了克服在过热汽温控制中对象参数变化对系统控制带来的困难,提出了自校正DMC-PID控制方法。保留了通常过热汽温控制采用的串级控制结构,能够快速有效地克服干扰。同时通过参数辨识得到非参数模型进行动态矩阵控制(DMC),即自校正DMC,无需从广义对象的阶跃模型的上下界中选取一条标称的阶跃响应曲线去实现DMC控制,实际应用起来更简单。仿真结果表明,控制方法有良好的控制效果,改善了模型失配时的鲁棒性,在过热汽温控制中是十分有效的。
During the course of controlling superheated steam temperature, in order to overcome the effects of object＇s parameters varying on control qualities of the system, a self - tuning DMC - PID control method is proposed in this paper. This method reserves cascade control structure usually used by superheated steam temperature control, so it can overcome interference effectively and quickly. At the same time, the Dynamic Matrix Control （ DMC）, whose non - parametric model is gotten by parameter identification （that is Self- tuning DMC） is realized without choosing a nominal step - response curve in the upper and lower bounds of the broad object＇s step model to achieve DMC control, thus simplifying the application. Simulation results show that, this control method can improve the robustness when model mismatch happens, has good control quality and is very effective for superheated steam control.
出处
《计算机仿真》
CSCD
2008年第12期254-257,共4页
Computer Simulation
关键词
自校正
动态矩阵控制
过热汽温
模型失配
Self-tuning
Dynamic matrix control
Superheated steam temperature
Model mismatch
