摘要
针对数控机床故障频出,以及为提高数控机床运行可靠性的需要,提出一种基于故障树建模的数控机床电器控制与驱动系统可靠性评估方法。以数控机床中的电器控制与驱动系统为例,首先阐述了其工作原理;其次基于数控机床电气驱动系统的特性,对某型机床电气控制与驱动系统的关键单元——主传动控制系统构建故障树,找到导致其失效的关键因素;然后利用贝叶斯网络模型对上述模型进行求解,得到系统各个工作单元的失效概率。通过上述研究,得出主传动控制系统中关键单元工作状态的概率,为数控机床整体运行的可靠性奠定了基础。
In order to improve the reliability of CNC machine tools,it presents a reliability evaluation method based on fault tree modeling. Taking the electrical control of the CNC machine tool and drive system as an example,it introduces the working principle of electrical control and drive system of CNC machine tools,proposes the complexity of the system,polymorphism,fuzzy and dynamic characteristics,establishes the fault tree construction from the perspective of dynamic and static,obtains the key factors that lead to failure. Based on Bayesian network model,it analyzes the probability of each unit＇s state key system,shows the probability of the working state of the key unit in the main drive control system.
出处
《机械设计与制造工程》
2018年第1期66-69,共4页
Machine Design and Manufacturing Engineering
关键词
驱动控制
电气系统
故障树
贝叶斯模型
可靠性
drive control
electrical system
fault tree
Bayesian model
reliability
