基于PI型非线性动态逆的再入飞行控制技术研究

Re-Entry Flight Control Method Research Based on Nonlinear Dynamic Inversion with PI Controller

再入飞行器飞行环境复杂,具有大空域、强非线性、强耦合的再入飞行特性,基于小扰动原理的经典线性控制理论难以适应再入控制系统的要求,提出了采用动态逆的非线性再入控制器设计方法,同时在非线性动态逆控制器设计中引入积分环节,以消除由动态逆建模和系统干扰带来的跟踪误差,从而使得系统对姿态进行高精度跟踪。最后,在Matlab/Simulink中进行了仿真验证。仿真结果表明,此控制系统对姿态指令输入有很好的跟踪效果,且具有较强的鲁棒性。

A control method using nonlinear dynamic inversion, which was able to overcome well to nonlinear, strong coupling and large-space properties of re-entry flight, was presented. PI Controller was used to eliminate tracking errors caused by dynamic inversion and disturbances. Nonlinear simulations of a control system using MATLAB/SIMULINK illustrated the excellent tracking performance and robustness of the proposed controller.