2013 Fiscal Year Final Research Report
On modelling and load allocations of k-out-of-n load sharing systems
| Project/Area Number |
21500273
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Statistical science
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| Research Institution | The University of Electro-Communications |
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Principal Investigator |
YAMAMOTO Watalu 電気通信大学, 情報理工学(系)研究科, 講師 (30303027)
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| Project Period (FY) |
2009-04-01 – 2014-03-31
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| Keywords | 線形劣化モデル / 累積損傷則 / 時間尺度 / 多変量寿命データ |
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| Research Abstract |
This research project aimed to develop the optimal allocation for load-sharing systems, especially with k-out-of-n logics. To do so we also needed to develop modelling approaches for lifetimes based on the records of degradation measurements, usage patterns, cumulative work loads and other variables, continuously monitored on the target systems. For the work load allocations, we investigated the piecewise linear degradation models with slopes which vary depending on the transformation of the loads powered by k. For k>1 cases, we conclude that the optimal allocations are same as cases with k=1. For k<1 cases, the optimal allocations are strange in that, the total work load must be put on one single component until its failure. We also investigate the modelling and prediction of lifetimes based on the continuously monitored data and developed several methods to predict individual lifetimes.
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