航空发动机闭环辨识研究

 本文介绍了在航空发动机闭环控制系统的反馈通路上施加伪随机试验信号时,对发动机模型参数进行辨识的方法。同时还介绍了对辨识试验所录取信号的相关分析与谱分析,以此来证明所录取信号的正确性。在用Hsia法进行辨识处理后得到了发动机的数学模型。最后通过对模型的验证表明辫识结果是满意的。

IDENTIFICATION INVESTIGATION OF CLOSED-LOOP AEROENGINE CONTROL SYSTEM

An aeroengine model can be identified from actual closed-loop engine test data if pseudorandom binary sequence as test signal acts on feedback circuit of the closed-loop control system. The fuel flow excited by PRBS is the input signal of the engine identification and the speed is the output. The model parameter values are consistent and unique estimation when burning delay of the engine burner is.This paper presents the identification test method that has been applied to Spey MK202 engine at the testbed and discusses the test signal analysis method that has been implemented at data processor. The model parameters of engine have been identified by use of Hsia method. The model examination shows that the result obtained with this method is satisfactory.