The reliability of non-repairable system can be calculated directly from its structure function by the component's reliability,but the repairable system's reliability calculation is very difficult because there is no general pattern. Take the simplest compound repairable system as an example,on the assumption that components are independent for each other,work time and repair time both obey exponential distribution and other basic conditions,the reliability mathematical model is established,the reliability parameters,such as instantaneous ava...