基于LabVIEW的直升机发动机控制—机械扭振系统耦合稳定性分析

Coupled Stability Analysis of the Helicopter's Engine Control System and Mechanical Vibration System Based on LabVIEW

直升机发动机控制系统与传动系统所构成的耦合闭环系统在某些情况下可能会失稳,造成严重的后果,所以在设计时需要确保其为耦合稳定。本文首先分析了耦合系统失稳的原因,然后以LabVIEW为开发工具对实际直升机系统进行建模,输入各部分的传递函数,并对耦合系统的稳定性进行了分析,最后对提高系统稳定性提出了一些改进意见。

The helicopter s engine control system and transmission system compose a coupled close-loop system.In some cases,the close-loop system may become unstable and give rise to series consequences.So in the design period,we must assure the coupled system is stable.In this article,we first analyze why unstable may happen,then model the system using LabVIEW,input the transfer functions,and analyze the stability of coupled system.At last,give some advises on improving the stability.