微特电机 ›› 2018, Vol. 46 ›› Issue (7): 29-33.doi: 1004-7018-46-7-29-33

• 设计分析 • 上一篇    下一篇

基于VMD的超声波电动机退化特征提取研究

陈柏言1,2,李洪儒1,安国庆1,3,许葆华1   

  1. 1. 陆军工程大学,石家庄 050003
    2. 中国人民解放军638501部队,白城 137001
  • 收稿日期:2017-04-07 出版日期:2018-07-28 发布日期:2018-07-28
  • 作者简介:陈柏言(1993—)男,硕士研究生,研究方向为装备状态监测与故障预测。
  • 基金资助:
    国家自然科学基金项目(51541506);河北省自然科学基金青年科学基金项目(E2017208086);河北省高等学校科学技术研究青年基金项目(QN2017329);河北科技大学通用航空平台青年基金项目(201525)

Research on Degradation Feature Extraction of Ultrasonic Motor Based on VMD

CHEN Bai-yan1,2,LI Hong-ru1,AN Guo-qing1,3,XU Bao-hua1   

  1. 1. Army Engineering University,Shijiazhuang 050003,China
    2. 63850 troops of the PLA,Baicheng 137001,China3. Hebei University of Science and Technology,Shijiazhuang 050018,China
  • Received:2017-04-07 Online:2018-07-28 Published:2018-07-28

摘要:

压电陶瓷部件开裂是超声波电动机的主要故障模式之一,压电陶瓷片上的孤极信号能够充分反映定子的振动状态,通过监测孤极信号研究超声波电动机的退化状态。利用变分模态分解(VMD)在处理信号时可以将信号分解成多个频段的良好特性,研究一种基于VMD的超声波电动机退化特征提取方法。通过VMD的方法寻找出孤极信号电机工作频率的高频段,提取均方根值、能量、方差和工作频率处幅值等退化特征,通过支持向量机验证了所提取退化特征的有效性。

关键词: 超声波电动机, 退化特征, 变分模态分解, 孤极信号, 支持向量机

Abstract:

The power of the ultrasonic motor depends on the piezoelectric ceramic component which can convert electrical energy into mechanical energy. One of the main causes of motor failure is the cracking of the piezoelectric ceramic. The accurate degradation feature extraction of ultrasonic motor can guarantee the safe operation of the motor before failure. The voltage signal of piezoelectric sensor in piezoelectric ceramics can fully reflect the vibration state of the stator. Taking advantage of VMD that can decompose the signal into several frequency bands when dealing with the signal. A degradation feature extraction method of ultrasonic motor based on VMD was proposed. High frequency of motor operating frequency in the voltage signal of piezoelectric sensor was separated through VMD. The root mean square value, energy, variance and amplitude at the operating frequency were extracted as degradation features. SVM was used to verify the validity of the extracted features.

Key words: ultrasonic motor (USM), degradation feature, variational mode decomposition (VMD), the voltage signal of piezoelectric sensor, support vector machine (SVM)

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