Reliability Design and Experimental Verification of Impact Sensor Signal Cable

Deep space exploration mission has the characteristics of diversity and environment complexity. More stringent requirements are put forward to impact monitoring capability when detector enters and lands target planet. Through cables impact sensor transmits impact signal to signal acquisition and processing unit. In order to ensure impact signal channels reliability, this paper proposes a design method of the printed circuit board transfer unit (PCB transfer unit) to connect impact sensor and detector cables, to solve the problem that the connection between the impact sensor and the cables of Mars detector does not fulfill the requirements of spacecraft welding process. In the meantime, on-orbit space environment adaptability and signal transmission reliability of the PCB transfer unit are verified through ground appraisal mechanical and thermal environment tests. The reliability design and experimental verification of impact sensor signal channels are important for the smooth realization of space exploration mission.