非线性反馈线性化方法在飞控系统中的应用

应用非线性反馈精确线性化方法进行了飞机自动着陆系统设计。首先，用非线性微分方程组表示的飞机纵向控制系统，在经过输入输出反馈线性化以后，可等效为线性系数；然后，用线性的ＰＩＤ控制方法对变换后的线性系统进行了设计；最后，考虑风的干扰，对所设计的飞机自动着陆控制系统进行了数字仿真。仿真结果表明，用反馈线性化方法设计的飞控系统具有良好的性能。

The Application of a Nonlinear Control Method to Flight Control Systems

A method of accurate nonlinear input output feedback linearization is applied to design the automatic landing system for aircraft in this paper. First, the longitudinal nonlinear differential equations of aircraft are linearized to two decoupling subsystems by the method mentioned above. Then, control laws for each linear subsystem are designed independently by linear control method. Therefore, the problem of output tracking for the original nonlinear system is transferred to that for each decoupling subsystem. Finally, the designed automatic landing control system is simulated under the atmospheric disturbances, and the simulation results show that the flight control system designed with the method of nonlinear feedback linearization has good performance.