变结构可重构飞控系统研究

A Slide-Mode Variable Reconfigurable Control Strategy inCase Aircraft Control Surfaces Fail

采用滑模变结构控制理论对飞行重构控制系统进行设计,构造出了滑模变结构重构控制系统。重构策略采用跟踪控制方法,在设计重构控制律时注重考虑执行机构的幅值饱和以及速率饱和。仿真结果表明:该方法具有很高的重构精度,能够快速而有效地实现重构控制。

We present a slide-mode variable structure control strategy which does not require failure detection before reconfiguration in case some aircraft control surfaces fail. There are two advantages in this reconfigurable control system: (1) the reconfigurable control law structure is simple and easy to design; (2) reconfigurable control strategy is based on tracking control method, which, if some aircraft control surfaces fail, enables the control system to accomplish the reconfiguration process automatically without first requiring failure detection. In numerical simulation, we need particularly eqs. (2) and (3) in section 1 and eqs. (10) and (14) in section 2. In our numerical simulation we take into consideration saturation limitations to both actuators' deflections and their deflection rates. Simulation results, shown in Figs. 1 through 12, indicate preliminarily that the performance of our slide-mode variable reconfigurable control strategy is indeed efficient in case some aircraft control surfaces fail.