不确定时滞过程Smith预估鲁棒H∞控制器的设计

以不确定大时滞过程为研究对象 ,对常规的 Smith预估控制系统进行变形 ,然后用灵敏度最小原则设计 H∞ 控制器 ,实现了对不确定大时滞过程的鲁棒性控制 .理论分析和仿真结果表明 ,这种新型控制方法能消除大时滞带来的不良影响 ,且鲁棒性强 ,能够有效抑制干扰和模型不确定性 ,只用一个可调参数就能有效协调系统的鲁棒性能和标称性能 .

A design of robust H∞ controller based on Smith predictor for uncertain time delay process

Taking uncertain large time delay process as the investigation target and modifying conventional Smith prediction control system,robust control over uncertain large time delay process is realized by using a H∞ controller designed according to the optimum sensitivity criterion.It is shown by theoretical analysis and computer simulation that this kind of new control method can eliminate the harmful influence caused by large time delay,possesses strong robustness,and can effectively restrain the disturbance and model uncertainty.Especially,the robustness and nominal performance of the system can effectively be coordinated with each other by using only one adjustable parameter.