基于方差分析的航空发动机风扇叶片外物撞击识别

doi:10.7527/S1000-6893.2020.24196

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基于方差分析的航空发动机风扇叶片外物撞击识别

张帅, 张强波, 张霞妹

中国飞行试验研究院发动机所, 西安 710089

收稿日期:2020-05-08 修回日期:2020-06-08 出版日期:2021-05-15 发布日期:2020-06-24
通讯作者: 张帅 E-mail:18792788842@163.com
基金资助:
装备预研中航工业联合基金（6141B05110404）

Identification of foreign object impact on aero-engine fan blades with variance analysis

ZHANG Shuai, ZHANG Qiangbo, ZHANG Xiamei

Power-Plant Institute, Chinese Flight Test Establishment, Xi'an 710089, China

Received:2020-05-08 Revised:2020-06-08 Online:2021-05-15 Published:2020-06-24
Supported by:
Joint Foundation of AVIC (6141B05110404)

摘要/Abstract

摘要： 航空发动机工作过程中风扇外物撞击事件的检测与识别对飞机飞行安全至关重要。通过风扇叶片外物撞击试验平台模拟真实发动机受外物撞击的过程，研究风扇外物撞击规律与检测识别方法。针对航空发动机的机载参数和加装振动参数对风扇外物撞击事件识别难度高与识别准确率低的问题，开展了基于非接触风扇叶片叶尖振动测量的外物撞击检测试验，提出了基于非接触叶尖振动位移方差威布尔分布函数极大似然估计与自动门限检测系统的风扇叶片外物撞击自动门限识别方法，并获取了风扇转子不同转速下外物撞击叶尖振动位移方差识别门限值。选取风扇转子转速为3 000 r/min状态下，直径为16 mm、质量为2.9 g的外物弹体撞击风扇叶片的振动位移数据进行分析，并采用高速摄像系统对该方法识别结果的可靠性进行验证，结果表明：基于非接触叶尖振动位移方差分析法能够准确识别风扇叶片外物撞击事件、撞击叶片编号与撞击叶片数。

关键词: 航空发动机, 外物撞击, 非接触叶尖振动, 方差分析, 参数估计

Abstract: The impact detection and identification of foreign objects on aero-engine fans are essential to the flight safety of aircraft. To simulate the impact process of foreign objects on the real engine fan blade, an impact test platform was constructed, and the rule and recognition method of impact on fan blades were studied. Aiming at the problems of high difficulty and low accuracy in identifying the impact of foreign objects on the fan by the airborne parameters and added vibration parameters, we conducted an impact detection experiment of the foreign objects based on the vibration measurement of the non-contact fan blade tip, subsequently proposing an automatic threshold detection system of the foreign object impact on the fan based on the maximum likelihood estimation of the vibration displacement variance. The threshold values of vibration displacement variance identification of the rotor blade tip impacted by foreign objects at different speeds were obtained. The vibration displacement data of the impact of the projectile with a diameter of 16 mm and mass of 2.9 g on the fan blade at the speed of 3 000 r/min was analyzed, with the reliability of the identification result verified by the high-speed camera system. The result shows that the method based on the analysis of non-contact tip vibration displacement variance can accurately identify the impact event, impact location and the number of impact blades.

Key words: aero-engines, foreign object impact, non-contact blade tip vibration, variance analysis, parameter estimation

中图分类号:

V232
V231.92

张帅, 张强波, 张霞妹. 基于方差分析的航空发动机风扇叶片外物撞击识别[J]. 航空学报, 2021, 42(5): 524196-524196.

ZHANG Shuai, ZHANG Qiangbo, ZHANG Xiamei. Identification of foreign object impact on aero-engine fan blades with variance analysis[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021, 42(5): 524196-524196.

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基于方差分析的航空发动机风扇叶片外物撞击识别

Identification of foreign object impact on aero-engine fan blades with variance analysis

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