随机序在系统剩余分配中的作用

Function of stochastic ordering in system spare allocation

研究了几种随机序在优化剩余元件的分配问题中的作用.指出一般随机序更有利于分配剩余元件中随机性最差的元件,而失效率随机序在这方面并不理想.在智能系统的剩余分配中,一般随机序更优越.在元件独立同分布时,失效率随机序更有效,而可靠度随机序比失效率随机序更强.在串联系统中节点的分配策略中,一般随机序是理想化的和谐分配,它比失效率随机序更有效.剩余元件的分配目的是利用一个适当的标准来优化系统的寿命,系统的寿命在可靠性理论中是一个很重要的问题.研究了被考虑的期望随机序、一般随机序、失效率随机序和可靠度随机序在系统的剩余分配中的作用.

The function of several stochastic orderings in the problem of optimization for spare components allocation was investigated and it was pointed out that ordinary stochastic ordering was more beneficial to the allocation of those spare components which have the worst randomness while the failure-rate stochastic ordering was, however, not so ideal as used in such case. For the spare allocation in intelligent system, the ordinary stochastic ordering was more superior. When the components were independent and with identical distribution, the failure-rate stochastic ordering would be more effective, and the reliability stochastic ordering, while use in such case, would be stronger than the former. In the node allocation policy of parallel system, the ordinary stochastic ordering was idealized harmonic allocation, being more effective than the failure-rate stochastic ordering. The objective of spare component allocation is to optimize the system service life by using an appropriate standard since the system service life is very important problem in the reliability theory, so that the function of all the considered anticipated stochastic ordering, ordinary stochastic ordering, failure-rate stochastic ordering, and reliability stochastic ordering in the system spare allocation was investigated.