大涵道比涡扇发动机涡轮监视温度容错解析

提出了对大涵道比涡扇发动机涡轮监视温度的容错解析方法,以避免由于涡轮监视温度传感器故障造成的发动机控制降级,或未检测到故障导致发动机超温.解析方法包含两种:一种是基于涡轮排气总温的解析方法作为主解析方法;另一种是基于空气流量模型的解析方法作为余度解析方法,用于在主解析温度与测量温度差异较大时进行比较取真.使用发动机试车数据进行了方法验证,结果显示:主解析方法的稳态计算误差不超过0.33%;余度解析方法的稳态计算误差不超过0.8%.这表明两种解析方法都是有效的,可以用于发动机容错控制.

Fault tolerance analysis of high-bypass-ratio turbofan engine turbine monitoring temperature

A turbine monitoring temperature analytic method was proposed for fault tolerance of high-bypass-ratio engine, so as to prevent engine control from degrading caused by turbine monitoring temperature sensor failure or overtemperature caused by undetected sensor failure. The analytic method includes two parts: one analytic method is based on turbine total exhaust temperature which is a main analytic unit; the other is based on air flow model as a redundant unit, which is used when the main analytic temperature differs a lot from the measurement temperature. An experiment on engine trial data was carried out. The results show that the main analytic unit's steady state error is less than 0.33%. The redundant unit's steady state error is less than 0.8%. Experiment results show these two analytic units are both valid and suitable for engine fault tolerant control.