Research on Optimization Method of Constant-Stress Accelerated Degradation Test of Harmonic Reducers Considering Parameter Weight

Harmonic reducers are long-lifespan, high - reliability products, widely used in the field of precision transmission. The reliability has a great impact on the reliability of the overall mechanical transmission system. Optimization design can effectively shorten the accelerated degradation test cycle of harmonic reducers and improve the accuracy of their reliability assessment. Existing methods ignore the proportion of each model parameter in the optimization objective function, resulting in low estimation accuracy of the optimized part of the parameters. Under the circumstances, a constant-stress accelerated degradation test scheme optimization design method considering parameter weights is proposed. Furthermore, an alternative scheme is established using the ant colony algorithm, whilst the calculation is based on the data obtained from actual measurements. In the entire optimization design process, a simpler optimization criterion is used to ensure the comprehensiveness of the results. Afterwards, the optimal accelerated degradation test scheme is obtained by statistical analysis. Eventually, the proposed method is applied to a numerical example and compared with one of the basic optimization criteria. The result shows the efficiency of the proposed method.