| 监测与诊断系统中传感器信号可靠性的确认 |
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| 引用本文： | 王雪,史铁林,阎明印,杨叔子.监测与诊断系统中传感器信号可靠性的确认[J].华中科技大学学报(自然科学版),1993(1). |
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| 作者姓名： | 王雪 史铁林 阎明印 杨叔子 |
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| 作者单位： | 华中理工大学机械工程一系
(王雪，史铁林，阎明印)，华中理工大学机械工程一系(杨叔子) |
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| 基金项目： | 国家“八五”重点科技攻关项目 |
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| 摘 要： | 根据设备监测与诊断系统诊断对象的复杂特点,提出了一种基于发生率的方法对传感器信号可靠性进行确认.通过在线采集一定时间内的数据,在规定的假设空间内,从证据中推导证据.对传感器信号的可靠性确认通过失效和设计检测处理,在事件发生率计算基础上,给出了规定假设空间内传感器信号可靠性的确认概率分配计算方法.
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| 关 键 词： | 诊断系统 故障诊断 基于知识的系统 传感器 可靠性 |
The Affirmation of Sensor Signal Reliability for a Machine Monitoring and Fault Diagnosing System |
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| Wang Xue Shi Tielin Yan Mingyin Yang Shuzi.The Affirmation of Sensor Signal Reliability for a Machine Monitoring and Fault Diagnosing System[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1993(1). |
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| Authors: | Wang Xue Shi Tielin Yan Mingyin Yang Shuzi |
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| Institution: | Wang Xue Shi Tielin Yan Mingyin Yang Shuzi |
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| Abstract: | The affirmation of the signal reliability in a knowledge-based machine monitoring and fault diagnosing system is of great importance. Since uncertainties in a knowledge base exist in most practical cases, how to deal with uncertainties including spurious sensor signals to guarantee accurate diagnosis is a crucial issue. A method based on a statistical apprach for sensor signal reliability on a machine monitoring and fault diagnosing ststem is proposed. With the on-line data collected within a given time and in a specified hypothetic space,evi- dence is derived from the evidence availale. Based on the rate of occurrence calculation, a method of calculating the updated probability distribution of the affirmation of signal reliability over specified hypothetic space is presented. |
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| Keywords: | diagnosing system fault diagnosis knowledgt-based system sensor reliability |
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