一般概率分布下考虑预防性维修的ADC模型可信赖度

Dependability in the ADC Model with Preventive Maintenance under General Probability Distribution

克服了马尔可夫假设条件的限制,假定系统寿命、修复性维修和预防性维修的修复时间均遵从一般概率分布.利用离散时间模型在数值计算方面的优势,建立了离散时间下系统正常工作、修复性维修和预防性维修三个状态之间的转移关系,在此基础上建立了一般概率分布下考虑预防性维修的ADC模型的可信赖度D.数值算例说明了该评估方法有助于选择合适的预防性修复周期来提高系统的效能.

For overcoming the limitation of the Markov assumptions, the lifetime, corrective maintenance time and preventive maintenance time are all assumed to be with general distribution. Using the numerical advantage of discrete-time model, the transition of the system states is established, including the operational state, corrective maintenance state and preventive maintenance state. Considering preventive maintenance, the dependability D of the ADC model with general distribution is built. Numerical examples illustrate that this evaluation method is useful for choosing appropriate preventive repair cycle to improve system performance.