多模型切换控制的抖动抑制

Restriction for the Vibration of Multi-model Switching Control

基于线性系统特征结构配置和模型跟踪方法以及优化工具,提出了可以有效抑制抖动的多模型切换控制策略,对两个线性时不变模型分别用特征结构配置方法设计反馈控制器对系统进行镇定。为了使导弹过载跟踪制导指令,又基于模型跟踪方法设计了前馈控制器。考虑到当控制器进行切换时,会产生抖动,为了减小切换时的抖动,针对切换后的特征结构配置反馈控制器,我们利用优化工具合理选取其自由度,使得切换前后两个系统在切换点上的输出差值最小。仿真结果表明,切换过程中的抖动可以得到有效抑制。

Based on the feature structure disposition of linear system and the method of model tracking, as well as the optimal tools, this paper proposes the controlling tactics of multi-model switching, which helps the effective vibration restraint. Directed at the two linear and time invariant models, the system is calmed by the feedback controller designed with the method of feature structure disposition. The feed forward controller is designed by employing the method of model tracking so that the missile can transship the tracking guidance instructions. Out of the necessity to reduce the vibration occurring in controllers while switching comes the attempt to dispose the feedback controllers aimed at the feature structure after switching, and choose its reasonable degree of freedom by making use of the optimal tools so that before and after the switching, the minimum output difference value of the two systems is made possible on the switch. Simulation results show that the vibration in the course of switching can be restrained effectively.