Impact test condition of particle impact noise detection for space relay remainders

Particle impact noise detection (PIND) is the standard for detecting remainders in aerospace relay and it is also an obligatory screening test after manufacture of the relays. Impact is an important process in particle impact noise detection. To identify the key factors of the peak acceleration and pulse duration of the impact. Investigate the activate effects of impact conditions for reminder particles, increase the success rate of testing. This paper establishes the mathematical model of impact, and then researches the influence of system parameters on the impact acceleration. The relationship between minimum impact acceleration and characteristic parameters of the reminder particles is investigated based on electricity image force theory; an equivalent impact condition table is given in this paper based on "the damage equivalent principle" and corresponding experiments are carried on. The experimental results show that to choose different impact conditions can activate different size of reminder particles effectively.