Journal of Japan Society for Safety Engineering
Online ISSN : 2424-0656
Print ISSN : 0570-4480
ISSN-L : 0570-4480
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Volume 25, Issue 2
JOURNAL OF JAPAN SOCIETY FOR SAFETY ENGINEERING_1986_2
Displaying 1-10 of 10 articles from this issue
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PROPOSAL FOR SAFETY
REVIEW
  • Discrete Event Simulator of Plant by Knowledge-Engineering Method
    [in Japanese], [in Japanese]
    1986 Volume 25 Issue 2 Pages 81-90
    Published: April 15, 1986
    Released on J-STAGE: November 30, 2017
    DOIhttps://doi.org/10.18943/safety.25.2_81
    JOURNAL FREE ACCESS
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    In large-scale plants sueh as atomic power plant, it is difficult to infer the sequence of abnor mal event a~ well as the propagation of disturbance in the plant. This paper deal with a discrete event simtilator for investiguting the event sequence. The simulator is constructed with the following modiflcations of the production-system which is a framework for developing expert system~ in knowl edge-engineering. ( i ) Not only the usual if-then rules, network type af knowledge representation is introduced in the short tcrm memory (STM) of production=system so that structural knowledge of plant is easily re presented. ( ii ) Discrete time st~p is introduced in the if-therL rule in ~~uch m~nner that the rllle does n{)t become firable until specifled time. With thls simulator, the accident 0L Three Mile Island is simulated as an example.

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  • On　the　Detectability　of　Tactile　Organs for　Mechanical　Vibrations
    [in Japanese]
    1986 Volume 25 Issue 2 Pages 91-98
    Published: April 15, 1986
    Released on J-STAGE: November 30, 2017
    DOIhttps://doi.org/10.18943/safety.25.2_91
    JOURNAL FREE ACCESS
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    In　many　mechanical　systems（airplanes，rotating　machines，motor－cars），the　vibrational　levels　of machines　are　closely　related　to　both　their　own　structure　and　their　physical　environments　where　they are　placed，　Thus，the　abrupt　change　of　vibrationaUevels　are　considered　as　the　symptom　of　incip－ient　faulty　and　undesirable　states　of　the　mechanical　system，　In　those　cases，the　hands（tactile　organs）of　experienced　operatofs　can　detect　even　slightest　changes　of　vibrations　more　quickly／reliably　than some　electronic　alarm－systems　with　some　appropriate　sensors．　If　this　capability　is　not　exceptional，the mechanical　systems　should　be　so　designed／armnged　to　assist　the　operator’s　tactile　perception、　Thus， the　tactile　recognition　systems　will　coexlst　with　traditional　audible／visible　ones　as　excellent　safety　mea咋 sures． With　the　view　as　above　mentioned，the　authors　investlgate　the　properties　of　human　tactiIe　pefcep－tion，i，e．the　threshold　of　perception，the　masking　e任ect，the　detectability　based　on　the　sigml　de－ tection　theory　and　their　residual　capability　after　some　time　el4psed、

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TECHNICAL REPORT
ACCIDENT ANALYSIS
SALOON
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