To study the chaotic degree of system function state change in the system fault evolution process,the concept of entropy is introduced,and the entropy of the system fault evolution process(evolution entropy for short)is proposed.Evolution entropy is the chaotic degree of the system function state at a certain time in the evolution process.It is a measure of change in the chaotic degree of the system function state when the system evolution develops from one mo-ment to another.It is numerically equal to the event fault probability distribution entropy at that moment(referred to as distribution entropy).The research shows that the evolution entropy can only be obtained from the event fault probabil-ity distribution at a certain moment and has a certain range of value domains.The logical relationship of events in the evolution process directly impacts the change in evolution entropy.The OR logic reduces the evolution entropy to less than the distribution entropy of any participating event.Moreover,the AND logic increases the evolution entropy to greater than the distribution entropy of any participating event.With the increase in transfer time,the effect of AND lo-gic and OR logic on the increase and decrease in evolution entropy reduces,respectively.Finally,the determination pro-cess of evolution entropy is exhibited by an example,summarizing the problems existing in the current research and put-ting forward the following research direction.
关键词
安全系统工程/系统故障演化过程/故障概率分布/演化熵/分布熵/与或逻辑/影响研究/系统功能状态
Key words
safety system engineering/system fault evolution process/fault probability distribution/evolution entropy/distribution entropy/AND OR logic/influence research/system function status
维普
万方数据