某型发动机高空小表速转速摆动问题分析

为了解决某型发动机研制过程中出现的高空小表速转速摆动问题,对发动机转速控制原理开展深入分析,利用AMESIM工具软件建立发动机转速控制数学模型,并对转速控制通道进行仿真对比分析,确定了通道参数对转速控制影响量值,通过对比同系列发动机控制参数,提出在现有系统构架基础上,对低压转子转速控制通道进行分段控制改进措施,经半物理试验、高空台模拟试验和试飞验证表明,改进措施既能保证发动机地面加速性要求,又解决了高空小表速转速摆动问题。

Analysis of the Rotor Speed Swing of the High-altitude Small Airspeed of an Engine Research on the Swing of Small Airspeed of an Engine

In order to solve the rotor speed swing problem of high-altitude small airspeed of the development engine,an in-depth analysis of the principle of engine rotor speed control was carried out.The mathematical model of engine rotor speed control was established by using AMESIM tool software,and the rotor speed control channel was simulated and compared.The influence of channel parameters on rotor speed control was determined.By comparing the control parameters of the same series of engines,on the basis of the existing system framework,the improvement measures of piecewise control for the rotor speed control channel of low pressure rotor were put forward.Through semi-physical test,altitude simulation test and flight test,it is shown that the improvement measures can not only ensure the acceleration requirement of engine ground,but also solve the problem of rotor speed swing of high-altitude small airspeed.