Reliability analysis of layered structure hot standby redundancy system
Luo Siwei · Journal of Beijing Jiaotong University · 2011
The hot standby redundancy structure has been wide used in safety critical system.The separation of intelligentized input output module,and logic processing module results in the layered structure.Two modules in the same layer are hot standby one another and the layers in series work,so it fulfills the system function.Using the Markov analysis method and taking account of the module failure ratio and maintenance ratio,we analyzed the reliability of layered hot standby redundancy system.We designed the state transition diagram according to the maintenance strategy of first resuming the system function,so reached the system reliability formula.In accordance with the emulation result,the influences of the different modules failure ratio and the maintenance ratio on system reliability are similar,and the influence of the module which has a low maintenance priority on system reliability increases.