航空发动机分布式系统解耦控制研究

Research on Decoupling Method for Distribute Control of Aero-engine

航空发动机控制系统是一个复杂的多变量控制系统,控制变量之间的相互耦合会严重影响系统的动态、稳态性能,在发动机最大工作状态时,甚至会造成超温、超转等现象,严重威胁着飞行安全,制约着发动机性能的提高。针对上述情况,利用改进型遗传算法对航空发动机双回路PID控制参数进行寻优,实现了对控制变量的解耦。数值仿真结果表明改进方法能有效消除各变量之间的耦合影响,而且在控制精度、跟踪性能等方面表现良好,对不同环境条件下的航空发动机模型均有良好的控制效果,适用于航空发动机控制。

Aero-engine control system is quite a complicated multivariable system with its variables coupling each other which will impact on the static and dynamic performance of system and even will give rise to the phenomena of exceeding temperature or rev in its ultimate state which not only threats the flight safety severely but also restrict the advance of Aero-engine＇s performance. To solve this problem, a PID deeoupling controller based on improved genetic algorithm is presented. The digital simulation of the control system has proved its excellent performance in controlling precision and tracking. The method is suitable for the aero-engine control system since it can assure satisfactory transient performance of aero-engine in condition of different environment and alleviate the coupling influence of each control variable effectively.