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Aiming the chain transmission system in the rapid secure device (RSD) of shipborne helicopter, an individual fault was that the chain was broken, and then the system gave an alarm. According to the above question, the RSD reliability growth test bench was built to conduct a reliability growth test study on the chain transmission system in a single RSD test prototype. After the cause of the fault was found, a part of the chain in the test prototype was tested by the chain pulling test machine. According to the test results, the reliability optimization design of the chain transmission system was carried out, and the optimization design scheme was determined. A suitable reliability growth test plan for the chain transmission system was formulated using the Duane model analysis method. Through the reliability growth test, the Class B failure statistics of the chain transmission system were obtained, and then the reliability growth Duane model of the total test time of the chain transmission system was established. Using the army materiel systems analysis activity (AMSAA) model analysis method, the approximate unbiased estimation of the instantaneous mean time between failures (MTBF) of the chain transmission system was carried out, the trend test of the reliability growth of the chain transmission system was carried out, and the confidence interval of the instantaneous MTBF at the end of the test time was obtained to verify that the reliability optimization design meets the planning requirements and provide a reference for the reliability growth research of the whole RSD equipment.

Research on Reliability Growth of Chain Transmission System in Rapid Secure Device of Shipborne Helicopter