基于模型跟踪变结构控制的飞行重构控制律设计

提出一种基于模型跟踪变结构控制的飞行重构控制律的设计方法.利用该方法能实现受控对象对理想模型较高精度的跟踪,使重构飞行控制系统具有较好的控制性能.首先设计了一个比例-积分滑模面以确保消除稳态误差,采用极点配置技术使滑模具有良好的动态品质,其次利用饱和控制技术来减少变结构控制引起的抖振现象,最后以某型飞机纵向飞行控制系统为例进行了相应的数字仿真.结果表明重构系统不仅实现了无抖振模型跟踪,而且还具有较强的鲁棒性.

The Design of Configurable Flight Control Law based on Model-Following Variable Structure Control

A design method of configurable flight control law based on model-following variable structure control is proposed in this paper. The controlled plant can track the reference model precisely using the controller, to provide better performance for the configurable flight control system. Firstly, the PI type sliding surface is designed to reduce the error of steady state. Pole assignment is used to make the sliding mode have good dynamic characteristics. Secondly, the simple saturation control is adopted to eliminate the chattering phenomena. Finally, The simulation is designed as an aircraft longitudinal control system. The results show that the configurable system has the high accuracy tracking performance and the stronger robust.