段金燕,赵强强,汪可,李戈琦,张进华,洪军

• 1:西安交通大学机械工程学院
• 2:西安交通大学现代设计及转子轴承系统教育部重点实验室
• 3:中国电力科学研究院有限公司

摘要(Abstract)：

为提高考虑运动失效参数影响的快速机构的运动精度，提出了一种基于首次穿越法的快速机构时变运动可靠性与灵敏度分析方法。首先，分析了快速机构运动的失效因素，明确了零部件加工与装配等随机误差对机构运动精度的影响；接着，根据储能过程的平面机构运动方程，利用矢量环法构建了快速机构的运动误差极限状态函数，建立了时变运动可靠性分析模型；然后，联合一阶线性估计、高维高斯条件分布以及一阶高斯截断矩特性，推导了一种新的时变运动可靠性首次穿越率解析公式；最后，结合数值积分求解方法，得到了快速机构时变运动的失效概率序列与灵敏度。仿真结果表明：在保障快速机构运动精度的过程中，应重点关注机构中的拨钉定位误差及偏心凸轮尺寸公差；所提方法得到的时变运动失效概率与蒙特卡罗法的计算结果相接近，但其计算成本却仅为蒙特卡罗法的0.04%。

关键词(KeyWords)： 快速机构;时变运动可靠性;失效因素;高斯截断矩;穿越率

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划资助项目（2021YFB2402100）;; 国家自然科学基金资助项目（52205539）;; 陕西省青年科学基金资助项目（2022JQ-388）

作者(Author): 段金燕,赵强强,汪可,李戈琦,张进华,洪军

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