模糊自整定PID的航空发动机转速控制研究

Rotating Speed Control for Aero-engine Based on Fuzzy Self-tuning PID Controller

航空发动机具有强非线性和强时变性的特点,使用定参数PID方法的转速控制系统的性能在全飞行包线内难以保证。针对上述问题,提出设计模糊自整定PID控制器,利用输入误差及变化率建立一组PID参数在线调整规则,运用模糊推理方法实时进行参数自整定。结合某型航空发动机核心机非线性实时模型,进行转速串级控制硬件在回路仿真。结果表明,提出的模糊自整定PID控制方法实现了控制器参数在线调整,参数切换扰动小,满足全包线内转速控制的指标要求。

Due to the strong nonlinearity and time - variation of aero - engine, it is difficult for the rotating speed control system based on the method of fixed parameters PID to possess the consistent performance. In consideration of this problem, a fuzzy self - tuning PID controller was proposed. On the base of the input errors and its changing rate, a group of online self - tuning rules were built for PID parameters. And the fuzzy reasoning methods were used to cal- culate the new parameters in real - time. Then combining with the nonlinear real - time model of an core - engine, the rotating speed cascade control hardware system was simulated in the loop. The result indicates that the fuzzy self - tuning PID controller realizes the online tuning of parameters with a small switchover disturbance and meets the re- quirements of the rotate speed control in the full envelope.