Attenuating Reliability Test and Assessment for Soft Landing of Chang’E-4 Probe

Attenuating reliability is extremely crucial for Chang’E-4 Probe, which softly landed on the far side of the Moon for the first time of all mankind on January 3, 2019. In the paper the failure mode and effects during attenuating process in the soft landing are investigated, from which the critical failure mode and the corresponding reliability characteristic parameter are both identified. Accordingly, ground test method for attenuating reliability to simulate the actual attenuating on the Moon is given. Then the attenuating reliability assessment method is accordingly proposed, from which the confidence limit of the reliability can be acquired. Finally, attenuating reliability test of Chang’E-4 Probe is conducted, and the confidence limit of attenuating reliability is provided. The assessment results indicate that the attenuating reliability of the probe possesses is very high as verified by the perfect soft land on the Moon.