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Comparative Analysis of System with Warm Standbys, Detection Delay, Standby Switching Failure, Reboot Delay and General Repair Times
standby switching failures
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|摘要:||在本篇研究中，我們取四種具有暖備備用零件的系統來進行討論。其中，這些系統都具有偵測延遲、備用轉換失敗率與啟動延遲的特性。主要零件和備用零件的故障率與修復率分別為指數分配與一般分配。重新啟動時間和偵測時間則都服從指數分配。假設在備用零件轉換成主要零件的過程中，其發生轉換失敗的機率為q。我們利用有系統的矩陣方法與輔助變數技巧，針對四種不同的結構，推導出穩態的無效度(UAv)。對於這四種結構，我們提供了三種不同的修復時間分配，如：指數分配、3-stage Erlang 分配、deterministic 分配。最後，我們代入不同的數值，來分析這四種結構的特性。|
In this thesis, we discuss the unavailability characteristics among four different configurations with warm standby units in which detection delay, standby switching failures and reboot delay are considered. The four configurations are studied under the assumption that the time-to-breakdown and time-to-repair of active (or standby) units are exponentially and generally distributed, respectively. The detection rate and the reboot rate are assumed to be exponentially distributed with parameter and , respectively. It is assumed that the process in switching a standby unit to be an active unit may experience a failure probability of q. We provide a systematic matrix method, using the supplementary variable technique to develop the steady-state unavailability, UAv, for four configurations and perform comparisons with three various repair time distributions, such as exponential, k-stage Erlang and deterministic. The sensitivity analyses for UAv with each parameter of the system are also studied.
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