| 嵌入式数控系统的结构可靠性分析 |
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| 引用本文： | 刘清建,王太勇,王涛,支劲章,刘振忠.嵌入式数控系统的结构可靠性分析[J].天津大学学报(自然科学与工程技术版),2010,43(2). |
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| 作者姓名： | 刘清建 王太勇 王涛 支劲章 刘振忠 |
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| 作者单位： | 天津大学天津市先进制造技术与装备重点实验室,天津,300072 |
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| 基金项目： | 国家高技术研究发展计划(863计划)资助项目，天津市科技发展计划资助项目，国家科技重大专项 |
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| 摘 要： | 当前对数控系统可靠性研究主要是一种滞后的可靠性研究,是对于成熟产品使用中出现的故障的研究,侧重于系统维修方面,而很少从可靠性工程的角度来研究.为此,对处于可靠性工程早期阶段的嵌入式数控系统的结构可靠性进行了分析和建模,给出基于实时操作系统(RTOS)平台的嵌入式数控系统层次化模块结构图,在对数控系统功能和实际开发过程分析的基础上,对传统的Littlewood模型进行了改进,得到了改进的Littlewood模型,即Improved-Littlewood模型,并将模型用于一个嵌入式数控系统的结构可靠性设计阶段,给出了模型中各种参数矩阵的确定方法,最后得到系统的结构失效密度模型和可靠度模型,验证了方法的可行性.
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| 关 键 词： | 数控系统 可靠性 Littlewood模型 失效密度 |
Structure Reliability Analysis of Embedded CNC System |
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| LIU Qing-jian,WANG Tai-yong,WANG Tao,ZHI Jing-zhang,LIU Zhen-zhong.Structure Reliability Analysis of Embedded CNC System[J].Journal of Tianjin University(Science and Technology),2010,43(2). |
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| Authors: | LIU Qing-jian WANG Tai-yong WANG Tao ZHI Jing-zhang LIU Zhen-zhong |
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| Institution: | LIU Qing-jian,WANG Tai-yong,WANG Tao,ZHI Jing-zhang,LIU Zhen-zhong(Tianjin Key Laboratory of Advanced Manufacturing Technologies , Equipments,Tianjin University,Tianjin 300072,China) |
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| Abstract: | Current research on the reliability of computerized numerical control(CNC) systems is mainly focusing on the breakdown in matured products and system maintenance,while there has been little interest in the CNC system reliability from the perspective of reliability engineering.Therefore,structure reliability analysis and modeling of embedded CNC system,which are in the early phase of the reliability engineering cycle,have been conducted,and the hierarchical module chart of the system based on real time opera... |
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| Keywords: | computerized numerical control system reliability Littlewood model failure density |
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