Reliability Analysis and Maintenance Strategies forComplex Systems and ComponentsA power supply consists of three rectifires in series. Each rectifier has a Weibullfailuredidtributionwitheqaulto2.1.Howevertheyhavedifferentcharacteristics lifetimes given by 12,000 hr, 18,500 hr and 21,500 hr. Find theMTTF and the design life of the power supply corresponding to a reliability of0.90.Given values:failure didtribution witheqaul to 2.1. with different life times as1232.1 3122.12.12.12.1123123///123/12,000/18,500/ 21,50011120001852.112, 000;18,500;21,500for weibul distribution,R tt Qt Qt QttttQhrs Qhrs QhrsR R Reeeeeee 2.12.192.191002150011112000185002150004.6 1004.6 102.19,Design T for R t0.90.9ln 0.94.6103196.163197.tttNow MTTFedtedtettthrs A system has two failure modes. One failure mode due to external conditions,has a constant failure rate of 0.07 failure per year. The second attributed towearout, has a Weibull distribution with a characteristics life of 10 year and ashape parameter of 1.8. Determine the system reliability for a design life of 1year. Find by trial and error the median time of failurePreview Mode
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