最大熵试验法对航天作动器输出可靠性的评估

为解决航天作动器在小子样情况下的输出可靠性评估难题，提出采用最大熵试验法对其可靠性进行评估。该方法针对航天作动器的裕度设计特点，选取作动器的输出力作为表征其输出可靠性的特征量，通过在临界工况点进行试验和计算来实现输出可靠性的评估，并对评估过程进行详细介绍。结果表明：最大熵试验法仅需较少试验子样数即可实现对较高可靠性（置信度0.95下的可靠度0.999 9）的评估，能够显著降低生产和试验费用；评估结果经计量法进行复算，结果一致、可信。

Maximum Entropy Test Method for Evaluating the Output Reliability of Space Actuators

A maximum entropy test method is proposed to evaluate the output reliability of space actuator with small sample size. According to the margin design characteristics of space actuator，the output force of the actuator is selected as the characteristic quantity to represent its output reliability. The output reliability is evaluated by experiment and calculation at critical operating points，and the evaluation process is introduced in detail. The results show that the proposed method can be used to evaluate high reliability (0.999 9 reliability with confidence of 0.95) with only a small number of test samples，and can significantly reduce the cost of production and test. The evaluated results are consistent and credible after recalculation by variables evaluation method.