On stand by system with repair and maintenance

Publication Title Name :On stand-by system with repair and maintenance /
Publication year :Thesis 1980
Publication Address :Abd Alla, Sadeka Ahmed.
Main Category :Engineering
Main & Sub Category :660 Chemical engineering - Maintenance
Vol :-
Dewey Decimal Classification (DDC)No :660.2
Article Title :On stand-by system with repair and maintenance /
Statement of responsibility :Sadeka Ahmed Abd Alla; supervised by Youssif Nasr El-Deen.
Place of publication :-
Name of publisher :-
Date of publication :1980.
Publication Extent :96 p. :
Publication Dimensions :30 cm.
Topical term :Maintenance.
Leader :00000naa#a2200000uu#4500
ISBN :9644277
Original BibID :FLS
Date and time of last modification :20130413162311.0
General informatio :/ c)1980. a)96 p. : b)ill. ; c)30 cm. a)Maintenance. Contains additional title page./ El-Deen, Youssif Nasr, / supervisor./Banha university. / facutly of science. -Natural science department./a)Contains additional title page./a)Includes bibliographical references./a)El-Deen, Youssif Nasr, e)supervisor./a)Banha university. b)facutly of science. b)Natural science department./a)نظرية الصلاحية الأحتياطى في حالة التصليح و الصيانة الوقائية./ نظرية الصلاحية الأحتياطى في حالة التصليح و الصيانة الوقائية. a)نظرية الصلاحية الأحتياطى في حالة التصليح و الصيانة الوقائية. In this thesis we are mainly conserned with the reliability of a standby system. Repair and preventive maintenance have been used to improve the mean life time of a proposed system. the thesis is divided into four chapters. In chapter 1, main units and one standby redundant repairable system, and the system for two dissimilar units with imperfect swithchover, are considered.Our concern is the time to the first system down.Applying identifying suitable regenerative stochastic points, we derive theprobabilistic integral equations for the probability function of the time to the first failure(TEST).Analytical and numerical comparisons of the mean TFST with both perfect and imperfect switching are made. The limiting distribution of the time to the system failure as the repair time decreases is investigated. We reveal the mistake in which, Osaki.S ,IEEE,Vol r-21 1972” has fallen in obtaining the mean TFSE for the two dissimilar units with imoerfect switchover. A part of this chapter is published in 14th annual conference on operation research, I.S.S.R, Cairo, 1979. Chapter 2 is intended to provide, The determination of the time to the first system down, for the parallel system of n main units and m reserve units with imperfect switchover, We consider the special case of n main units and one reserve with imperfect switchover. In chapter 3, a repairable two dissimilar units standby redundant system is considered under the three maintenance policies, difficult maintenance policy in which the preventive maintenance performs independently of the state of the stand by unit. Moving maintenance policy, in which the preventive maintance occurs only if there is a unit in standby, if the standby unit is under repair or maintance, then the preventive maintenance performs only after completing repair or maintenance of the standby unit./a)In this thesis we are mainly conserned with the reliability of a standby system. Repair and preventive maintenance have been used to improve the mean life time of a proposed system. the thesis is divided into four chapters. In chapter 1, main units and one standby redundant repairable system, and the system for two dissimilar units with imperfect swithchover, are considered.Our concern is the time to the first system down.Applying identifying suitable regenerative stochastic points, we derive theprobabilistic integral equations for the probability function of the time to the first failure(TEST).Analytical and numerical comparisons of the mean TFST with both perfect and imperfect switching are made. The limiting distribution of the time to the system failure as the repair time decreases is investigated. We reveal the mistake in which, Osaki.S ,IEEE,Vol r-21 1972” has fallen in obtaining the mean TFSE for the two dissimilar units with imoerfect switchover. A part of this chapter is published in 14th annual conference on operation research, I.S.S.R, Cairo, 1979. Chapter 2 is intended to provide, The determination of the time to the first system down, for the parallel system of n main units and m reserve units with imperfect switchover, We consider the special case of n main units and one reserve with imperfect switchover. In chapter 3, a repairable two dissimilar units standby redundant system is considered under the three maintenance policies, difficult maintenance policy in which the preventive maintenance performs independently of the state of the stand by unit. Moving maintenance policy, in which the preventive maintance occurs only if there is a unit in standby, if the standby unit is under repair or maintance, then the preventive maintenance performs only after completing repair or maintenance of the standby unit./ theses (PH.D).Banha Univeristy.Faculty of Engineering.department of Sciences Natural. a)theses (PH.D).Banha Univeristy.Faculty of Engineering.department of Sciences Natural. a)Text in english and abstract in english. 1)D 2)Doctora/
Cataloging Source :080214s1980####xx|ad##frmb###000#0#eng#c
DDC No :2)21 a)660.2
Personal Name :a)Abd Alla, Sadeka Ahmed.
Publication data field :a)On stand-by system with repair and maintenance / c)Sadeka Ahmed Abd Alla; supervised by Youssif Nasr El-Deen.
physical descripti :-
Topical term :-
Language Code :a)EG EULC d)EG EULC a)eng b)eng
Additional input :-
Author Name :Abd Alla, Sadeka Ahmed.

 

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