直接根据性能指标进行航空发动机LQG/LTR控制器设计

DESIGN OF AEROENGINE LQG/LTR CONTROLLER ACCORDING TO PERFORMANCE TARGET

本文提出了一种根据性能指标要求设计航空发动机ＬＱＧ／ＬＴＲ控制器的方法。采用这种方法，可根据发动机模型及性能指标要求直接获得卡尔曼滤波器增益，而无需求解Ｒｉｃｃａｔｉ方程。随后的仿真结果表明，所设计的控制系统具有较好的稳定鲁棒性及较好的动态性能。

When LQG/LTR methodology is applied to control system design,it is not easy to choose proper covariance matrices for Kalman filter design for good dynamic performance and robustness of the control system.The methodology is based on the idea that if the control system is decoupled,the target close loop transfer functions of each channel can be presented according to the demands of dynamic performance.After the recovery procedure is finished,the system performance must approximate the target.With the methodology provided for designing the Kalman filter,the Kalman filter gain matrix can be calculated directly in accordance with the performance targets and state space matrices of the plant so that it is unnecessary to solve the Riccati equation.The simulations show that dynamic performance of the control system designed by using this methodology meets the design target,and its robustness is good.