基于参数控制偏差的航空发动机性能修正方法

Methodology for Parameter Control Deviation Based Aero-Engine Performance Correction

摘要:

受多种因素影响,航空发动机在使用过程中其控制参数较设计值会出现不同程度的偏差。研究发现,控制偏差主要来源于传感器误差、控制系统精度及环境因素等,偏差对发动机性能修正的准确性有一定影响。通过建模与仿真分析,研究了主控制计划和几何可调机构控制偏差对航空发动机推力、耗油率(Specific Fuel Consumption, SFC)等性能参数修正的影响。为提高发动机性能修正的准确性,提出了基于控制偏差的航空发动机性能修正方法,并通过航空发动机台架试车数据对该方法进行了验证,结果表明采用考虑控制偏差因素的航空发动机性能修正方法,可以提高性能修正的准确性。

Abstract:

Affected by various factors, aero-engine parameters will show different degree of control deviation. It is found that the control deviation mainly caused by sensor error, control system accuracy and environmental factors, which affects the accuracy of engine performance evaluation. The influence of the control deviation of the main control plan and the geometric adjustable mechanism on the correction of the performance parameters of the aero-engine such as thrust and fuel consumption are studied by modeling and simulation. To improve the accuracy of engine performance evaluation,an aero-engine performance parameter correction method considering control deviation is proposed and verified by engine bench test data. Results show that the parameter correction method considering control deviation can improve the param-eter correction accuracy.