基于元动作链理论的数控机床故障分析

摘要/Abstract

摘要： 利用所提出的元动作链方法建立宏观系统可靠度变化与微观元动作运行失效原因之间的联系，对数控机床运行过程中的运行故障进行了分析。以蜗轮齿面磨损失效为例，分析了微观失效原因与故障发生概率的联系，并综合所得到的故障底事件发生概率曲线，融合成系统可靠性曲线，从而实现系统结构信息、系统运行信息、微观失效原因信息、宏观可靠性模型的高度集成。算例表明，所提出的元动作链模型能够对机床的状态变换进行准确描述，有助于精确分析机电系统所有的故障模式，消除了传统可靠性建模过程中的不确定性。

关键词: 数控机床, 可靠性, 元动作链, 失效原因, 系统建模

Abstract: To analyze running faults of CNC machine tools, meta-action chain methodology was proposed to establish the model between macro system reliability and micro failure cause of meta-actions. Taking the wear failure of worm gear as an example, the relationship between microscopic failure causes and probability of occurrence of faults was analyzed. Reliability curves of the whole system were calculated by integrating reliability curves of failure bottom events of all meta-actions. The system structure informations, system operation informations, microscopic failure cause informations, and macro reliability model were all integrated into the meta-action chain methodology.The examples show that the proposed meta-action chain model may fully reflect the state transition of each components in a CNC machine tool when the whole system implements each function, thus eliminating the uncertainty in traditional reliability modeling and is good for accurately analyzing all the fault modes of the mechatronic systems.

Key words: computer numerical control(CNC) machine tool；reliability；meta-action chain；failure cause, system modeling

中图分类号:

TH17

张根保;王扬. 基于元动作链理论的数控机床故障分析[J]. 中国机械工程.

ZHANG Genbao;WANG Yang. Analysis for Failures of CNC Machine Tools Based on Meta-action Chain Methodology[J]. China Mechanical Engineering.

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