摘  要：針對再制造發動機產品質量一致性較差導致出廠驗收磨合效率低的問題，通過對發動機表面振動信號的實時監測與分析，達到判斷其磨合質量，提高工作效率的目的。利用經驗模態分解（empirical mode decomposition，EMD）的結果，基于對振動綜合度的應用研究，提出磨合質量參數作為評價再制造發動機磨合質量的指標。通過對比再制造發動機與在用發動機的分析結果，結合發動機性能試驗數據，證明磨合質量參數隨著磨合過程的進行逐漸減小，且具有良好的靈敏度。在綜合分析多臺發動機試驗結果的基礎上，提出將3%作為磨合質量參數的閾值，以此評價再制造發動機的磨合質量。

關鍵詞：經驗模態分解；振動綜合度；再制造發動機；磨合質量

文獻標志碼：A       文章編號：1674-5124（2015）12-0119-05

Study on running quality evaluation of remanufactured engine based on

EMD and overall vibration

AN Xiangbi1， GUO Zheng1， CHEN Chengfa1， ZHANG Zhe2， WANG Hu1

（1. Military Transportation University，Tianjin 300161，China；

2. The Yantai Garrison Unit 84，Yantai 264000，China）

Abstract: In order to solve the problem that remanufactured engine is low in running efficiency during factory acceptance for its poor quality conformity， the vibration signal on the engine surface was monitored and analyzed in real time to judge the engine running quality and improve its work efficiency. based on the application and study of comprehensive vibration scale and the results of empirical mode decomposition （EMD）， this paper has presented to take running quality parameters as the evaluation index for engine running quality. The running quality parameters have been proved to reduce gradually and much flexible during the running process in combination with the comprehensive analysis of remanufactured engines and in-use engines and the engine performance test data. After studying the test results of multiple engines， it was proposed to set the threshold of running quality parameters as 3% so as to evaluate the running quality of remanufactured engines.

Keywords: EMD； overall vibration； remanufactured engine； running quality