基于倒频谱分析的航空发动机转静碰摩部位识别  

Identifying Rotor-stator Rubbing Positions Using the Cepstrum Analysis Technique

作　　者：陈果[1] 于明月[1] 刘永泉[2] 姜广义[2] 李成刚[2] 冯国全[2] 王德友[2] 

机构地区：[1]南京航空航天大学民航学院,南京211106 [2]中国航空工业集团公司沈阳发动机设计研究所,沈阳110015

出　　处：《机械工程学报》2014年第7期32-38,共7页Journal of Mechanical Engineering

基　　金：国家安全重大基础研究(613139);国家自然科学基金(61179057)资助项目

摘　　要：提出基于倒频谱分析的航空发动机碰摩部位识别方法,利用倒频谱分析方法,从机匣振动加速度信号中分离出传递路径特征,该特征反映从碰摩点到机匣测点的传递路径信息,因此,不同的碰摩部位将具有不同的传递特征信息,并以此提取出20个碰摩部位识别特征。利用航空发动机转子试验器模拟大量不同部位的碰摩试验,对不同碰摩部位的试验样本进行特征分析,表明相同碰摩部位的特征一致性,以及不同碰摩部位的特征差异性,利用最近邻分类方法,进行碰摩部位识别,识别率达到100%,充分验证了方法的有效性。The method of aero-engine rubbing positions identification based on cepstrum analysis is proposed. The transfer path characteristics which reflect the transfer characteristics information from rubbing points to casing measuring points are separated from the vibration acceleration signals of casing by means of cepstrum analysis. Therefore, there is different transfer characteristics information at different rubbing positions, and in view of this, twenty rubbing positions identification features are extracted. A large number of rubbing experiments of different positions are simulated with the rotor experiment rig of aero-engine, and the characteristic analysis of experimental samples at different rubbing positions is carried out, and the results indicate the consistency of features to the same rubbing position and the difference of the features to the different rubbing positions. Aero-engine rubbing positions identification is carried out using the nearest neighbor classification method. The recognition rate reaches 100%, and the effectiveness of the method is full verified.

关 键 词：航空发动机转静碰摩 碰摩部位识别 倒频谱分析 传递路径 

分 类 号：TB132[理学—物理]