A brief introduction for the maintenance system(especially civil aviation maintenance system) followed by the Reliability Centered Maintenance (RCM)pattern firstly be discussed in the front part of this article.Then more reality problems in maintenance sys and RCM realization be presented.Through the information entropy theory combined with the aviation maintenance system,fault message entropy index be presented.%介绍了维修信息系统(主要是民航维修信息系统)的现状,讲解了维修策略中以可靠性为中心的维修(RCM)理念,继而讨论了维修信息系统与可靠性为中心的维修(RCM)在实现上的困难.通过引入信息熵概念和信息熵指标,为维修信息系统中的数据应用开辟新的观点.
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