中国民航大学学报 ›› 2020, Vol. 38 ›› Issue (5): 17-22.

• 民用航空 • 上一篇    下一篇

航空发动机压力传感器故障影响仿真分析

杨坤a,孙晓楠b   

  1. (中国民航大学a. 适航学院;b. 航空工程学院,天津300300
  • 出版日期:2020-10-25 发布日期:2020-10-23
  • 作者简介:杨坤(1980-),女,天津人,副教授,硕士,研究方向为航空发动机控制.
  • 基金资助:
    工信部民用飞机专项科研项目(MJZ-2014-J-75)

Simulation analysis on influence of pressure sensor fault on aeroengine

YANG Kuna,SUN Xiaonanb   

  1. (a. College of Airworthines; b. College of Aeronautical Engineering, CAUC, Tianjin 300300, China)
  • Online:2020-10-25 Published:2020-10-23

摘要: 建立大涵道比涡扇发动机非线性部件级模型和控制器模型,将压力传感器恒偏差模拟故障加入控制系统,分析航空发动机在稳定工作状态时压力传感器故障对其性能参数的影响。结果表明:当低压涡轮出口压力传感器故障导致测量值低于真实值时,N1尧N2尧EGT尧SM 的仿真值会高于真实值,并且随着传感器恒偏差故障值增大而偏离稳态值的程度也变大。通过对压力传感器故障的影响分析,为航空发动机控制系统的适航审定工作提供参考。

关键词: 航空发动机, 部件级模型, 控制器模型, 传感器故障

Abstract: The nonlinear component level model and controller model of large bypass ratio turbofan engine are established. In order to analyze the influence of pressure sensor fault on performance parameters of the aeroengine during steady working, the constant deviation simulation fault of pressure sensor is added to the control system. Results show that when the measured value of low pressure turbine outlet pressure sensor is lower than the actual value,the simulated values of N1, N2, EGT and high pressure compressor surge margin SM will be higher than the true value, and as the value of sensor constant deviation fault increases, the deviation degree from the steady state value also increases. Impact analysis on pressure sensor fault provides reference for the airworthiness certification of aeroengine control system.

Key words: aero-engine, part level model, controller model, sensor fault

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