多失效模式下电阻制动系统的可靠性建模与分析  

Modeling and analysis about reliability of rheostatic brake system in multiple failure modes

作　　者：丁号[1] 盛步云[1] 王琳[1] 罗丹[1] 

机构地区：[1]武汉理工大学机电工程学院,湖北武汉430070

出　　处：《机电工程》2016年第5期633-637,共5页Journal of Mechanical & Electrical Engineering

基　　金：湖北省自然科学基金资助项目(2015CFA115);湖北省科技支撑计划项目(2015BAA058)

摘　　要：针对电阻制动系统在多种失效模式下的建模问题,对电阻制动系统的建模方法和可靠性模型参数估计方法进行了研究,对电阻制动系统易损件及相应的失效模式进行了统计,提出一种基于故障树的多失效模式可靠性建模方法和基于最小二乘法和遗传算法的参数估计方法,利用系统整体及各部件的可靠度模型进行了可靠度分析和寿命预测。分析结果表明,考虑失效模式建立可靠性模型可以直观地揭示失效模式对产品可靠性的影响趋势,有利于产品的维护和寿命预计,为可靠性提高制定有效措施提供了依据。Aiming at the modeling issues of rheostatic brake system malfunction in multiple failure modes, the modeling methods of rheostatic brake system and parameter estimation methods of the model were researched. The statistics of wear parts in rheostatic brake system and cor- responding failure modes were collected. The modeling method in multiple failure modes based on the fauh tree and the parameter estimation method based on the least squares method and genetic algorithm were proposed. Then reliability was analyzed and lifetime was predicted by using the modal of system and parts models. The results indicate that considering the multiple failure modes can visually reveal reliability trends affected by failure modes, which favors product maintenance and life expectancy and provides a basis for developing effective measures to improve reliability.

关 键 词：多失效模式 故障树 电阻制动系统 可靠性 

分 类 号：TB114.35[理学—概率论与数理统计] U260.138[理学—数学]