Research on Optimization Design Method of Reliability Validation Test in the Case of Zero-Failure Data

As we know, it’s valuable to take reliability validation on the spaceflight products under the condition of zero-failure data. Nevertheless, there have relatively fewer demonstrations based on Weibull distribution. An optimization design method of reliability validation test is researched based on Weibull distribution for improving the reliability of the products. The method can be summarized as follows: The working life and reliability index are primarily assumed. Then the minimum cost is taken as the optimal target, the totality of samples and the proportional coefficients of the test time are defined as variables. Subsequently, the optimal function can be solved according to least squares method, with the numerical values chose reasonably in the scales of the variables. Finally, the optimal scheme can be obtained, in which the calculation result of the reliability index is meeting the given constraint. Example for optimal calculation of zero crossing test of a reaction wheel is presented and the credibility of the suggested method is confirmed. The propounded method can offer some instructions for the design of similar test programming.