改进参考模型的涡扇发动机多变量模型参考自适应控制

Multivariable Model Reference Adaptive Control for Turbofan Engine with Improved Reference Model

关键词:  涡扇发动机  多变量控制  模型参考自适应控制  改进参考模型  动态响应

Key words:  Turbofan engine  Multivariable control  Model reference adaptive control  Improved reference model  Dynamic response

摘要:

针对涡扇发动机难以获得精确数学模型和普通模型参考自适应控制不保证动态性能的问题，提出了一种具有改进参考模型的涡扇发动机多变量模型参考自适应控制方法。采用状态反馈形式设计了状态跟踪的多变量自适应控制器，其中对参考模型作了引入跟踪误差反馈的改进，使得高自适应增益下跟踪曲线的超调得到明显的抑制，动态响应得到改善。应用该方法对涡扇发动机非线性部件级模型进行仿真分析，结果表明，控制系统调节时间小于2s，无稳态误差，具有良好的控制品质。

Abstract:

To deal with the difficulty of obtaining accurate mathematic model for turbofan engines and the lacking of guarantee for dynamic performance of a general model reference adaptive control， a multivariable model reference adaptive control method containing an improved reference model is proposed. The multivariable adaptive controller is developed with state feedback for state tracking and the tracking error feedback is introduced into the reference model， which presents apparent restraints upon the overshoot of the tracking curve under large adaptation gains and improves dynamic response. In application to the nonlinear component-level-model of a certain turbofan engine， the control system achieves satisfactory quality of less-than-2s settling time and zero steady-state error.