复杂机电产品基于元动作分解的可靠性建模及故障诊断

为了探讨复杂运动机电产品的故障诊断方法,按照功能-运动-动作(functionsmovement-action,FMA)对复杂机电产品进行结构化分解,根据结构化分解和符号有向图提出了复杂机电产品的可靠性故障诊断模型。为了进一步提高模型的故障诊断能力,将复杂机电产品的元动作定量信息加入模型中,利用模糊数学理论对元动作故障进行定量诊断。采用该方法可以通过对产品运行的变量监测,提高对产品故障的识别能力,为运动复杂机电产品的故障诊断提供基础模型。最后,以某型号加工中心刀库为例,验证了方法的可行性。

Reliability modeling and fault diagnosing method of complex electromechanical products based on meta-action decomposition

To study the fault diagnosis method of many-movement complex electromechanical products, we first decomposed complex electromechanical products according to functions-movement-action(FMA) structural decomposition and established a reliability and fault diagnosis model based on meta-action decomposition and signed directed graph. Then, to improve the ability of fault identification, we brought the meta-action quantitative information of complex electromechanical products into the reliability and fault diagnosis model and diagnosed the fault of meta-action quantitatively by fuzzy theory. The proposed method can improve the fault identification ability of products by monitoring the operating status variables, and provide a fundamental model for fault root cause analysis. Finally, certain machining center was taken as an example to verify the effectiveness of proposed model and analysis method.