基于计数型控制图的设备预防维修控制

Equipment preventive maintenance control model based on attribute control charts

以设备零备件维修为研究对象,假设零备件的失效率服从指数分布,对零备件失效率进行参数估计。利用经济性模型确定控制图界限的参数,在参数已知的条件下,构建出零备件的计数型控制图模型,控制图可对设备零备件的失效频次进行有效预防控制。通过实例验证发现,可对设备零件的失效频次进行预防控制,识别零件失效是随机还是系统因素,使设备维修更有效。

By taking spare parts maintenance of equipment as the research object and assuming the equipment failure density function obeying exponential distribution,the failure rates of spare parts is calculated by parameter estimation.The parameters of control chart line is calculated based on the economic model,and the attributes chart model of spare part is constructed on the condition of parameters be given.Therefore,this control chart can monitor equipment spare parts failure frequency effectively.Example testing result shows that the random or systematic factors of equipment parts failure frequency can be identified by this control chart,which is effective to equipment repair.