Journal of Japan Society for Safety Engineering
Online ISSN : 2424-0656
Print ISSN : 0570-4480
ISSN-L : 0570-4480
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Volume 33, Issue 4
JOURNAL OF JAPAN SOCIETY FOR SAFETY ENGINEERING_1994_4
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REVIEW
  • Fault　Diagnostic　Expert　Sy・stem　for　Processes　with　False　Information　of　Sensors
    Zong－Xiao　 Yang, Kazuhiko Suzuki, Yukiyasu Shimada, Hayatoshi Sayama
    1994 Volume 33 Issue 4 Pages 213-222
    Published: August 15, 1994
    Released on J-STAGE: June 30, 2017
    DOIhttps://doi.org/10.18943/safety.33.4_213
    JOURNAL FREE ACCESS
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    This　paper　presents　the　expert　system　for　fault　diagnosis　of　processes　using　fault　tree　analysis　in　the　presence　of　false information　of　certain　sensors．The　fault　propagation　in　the　process　is　modeled　by　causal　relationships　from　the　fault　tree and　its　minimal　cut　sets. The　measurement　patterns，which　are　obtained　from　the　fault　propagation　model，are　stDred　in　the knowledge　base　for　the　fault　diagnosis．The　expert　system　can　identify　component　failures　and　disturbances　which　can　lead to　process　malfunctions　with　false　information　of　sensors　by　matching　the　pattem　of　process　data　from　plant　with　the pattem　of　stored　data　in　the　computers．From　unavailabilities　of　components　and　sensors，the　estimated　rates　are　provided for　sequellce　checking　in　diagnosis．We　show　advantages　of　the　method　by　applying　the　diagnostic　system　to　a　reactor control　and　protection　system.

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