谐波减速器精度退化失效及相关竞争失效可靠度评估研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (15) : 277-287.

论文

张弦1，王鹏1，张昌明1，姜歌东2

作者信息 +

Reliability evaluation for precision degradation failure and dependent competing failure of harmonic drives

ZHANG Xian1, WANG Peng1, ZHANG Changming1, JIANG Gedong2

Author information +

文章历史 +

摘要

为了准确评估谐波减速器可靠度，实现失效预测和主动维护，提出了一种谐波减速器相关竞争失效可靠度评估方法。首先，根据谐波减速器精度性能退化测试数据，将指数模型应用至精度状态转移方程，采用粒子滤波算法进行了谐波减速器精度退化建模、参数更新和退化趋势分析，实现了谐波减速器精度退化失效寿命分布预测和精度动态可靠度评估；然后，结合谐波减速器强度失效和刚度退化失效的样本及失效寿命分布，基于Copula相关函数，建立了谐波减速器精度失效、刚度失效和强度失效的相关竞争失效动态可靠度评估方法；最后，通过谐波减速器精度、刚度和强度的相关竞争失效分析，得到了谐波减速器加速工况和额定工况下精度退化失效、刚度退化失效和强度失效的失效次序，并通过谐波减速器试验失效样本对所提出方法的有效性进行了验证。

Abstract

A dependent competing failure reliability evaluation method is proposed to estimate the reliability of harmonic drive precisely for failure prediction and proactive maintenance. Firstly, based on the measurement data of harmonic drive precision performance degradation, an exponential model is applied into the state transition function of precision, the precision degradation modelling, model parameter updating and degradation trend analysis are realized with the particle filter method. Then the precision degradation failure distribution is predicted and the precision dynamic reliability is evaluated in harmonic drive. Secondly, combined with the failure samples and failure life distributions of strength failure and stiffness degradation failure of harmonic drive, the dependent competing failure dynamic reliability evaluation method is modelled through Copula function. Finally, the failure order of precision degradation failure, stiffness degradation failure and strength failure of harmonic drive under accelerated condition and rated condition are deduced with dependent competing failure analysis of precision, stiffness and strength. The effectiveness of the proposed dependent competing failure reliability model is verified by the failure samples of harmonic drive during life tests.

导出引用

张弦1，王鹏1，张昌明1，姜歌东2. 谐波减速器精度退化失效及相关竞争失效可靠度评估研究[J]. 振动与冲击, 2024, 43(15): 277-287

ZHANG Xian1, WANG Peng1, ZHANG Changming1, JIANG Gedong2. Reliability evaluation for precision degradation failure and dependent competing failure of harmonic drives[J]. Journal of Vibration and Shock, 2024, 43(15): 277-287

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