基于多模型的飞行控制律重构仿真设计

Multiple Model Based Flight Control Reconfiguration Simulation Design

针对飞行控制安全问题,基于多模型自适应控制理论,进行飞行控制律重构仿真设计,利用某机型气动导数建立飞机非线性模型,提取线性模型,针对几种典型舵面故障,建立系统故障线性模型,离线设计重构控制律,采用PID经典控制方法设计控制律构型,针对PID控制参数传统整定方法难以获得理想效果而又费时的缺点,利用MATLAB优化工具确定控制律参数,并设计在线切换函数,通过仿真表明,提出的重构方案具有良好的容错效果,可以明显提高飞机的安全性能。

For flight control security issues,based on the theory of multi-model control,flight control reconfiguration was designed and simulated,Using aerodynamic derivatives of a kind of airplane built the nonlinear model,linear models was extracted from the nonlinear model.Aiming at several typical control surface failures,fault models of the system were built,the reconfigurable control law was designed off-line,classical PID control method was used to design the control law structure,in view of the limitation of conventional methods,a method for PID parameters optimization using MATLAB optimization tools was researched,then online switching function was designed, Simulation results show that the proposed fault-tolerant reconfiguration scheme has good fault-tolerant effect and can significantly improve the safety of aircraft performance.