基于Riccati方程的航空发动机鲁棒容错控制

采用状态反馈控制律,基于Riccati型方程,导出了对象模型存在参数摄动的航空发动机控制系统对传感器失效具有完整性的一个充分条件,并给出了使该充分条件得到满足的一种迭代计算方法。以某型双转子航空发动机为例进行了仿真设计,仿真计算结果表明上述方法有效、实用。对于执行器发生故障的情形,也给出了类似的结论。

Robust Fault-Tolerant Control for Aeroengine Based on Solution of Riccati Equation

Using a feedback control law,a sufficient robust fault-tolerant condition is derived based on the solution of Riccati equation. The fault-tolerant condition can make an aeroengine possess integrity against both sensor failure and parameter perturbation of the engine model. According to the proposed robust fault-tolerant condition,a new design method and an iterative design procedure are presented through increasing gradually the state-weighted matrix in the Riccati equation. The design method was applied to a turbojet engine to demonstrate its effectiveness. It is proved to be very useful and effective with the satisfactory numerical simulation results of the robust fault-tolerant engine control system. The similar fault-tolerant condition and corresponding design method are also concluded in the case of actuator failure.