Design of high-frequency and micro-amplitude impactor suitable for extraterrestrial rock sampling

Abstract

The traditional rotary drilling technology has the problems of high-required axial force, high power consumption, large mass and serious wear of the drill bit. It is difficult to be better applied in the detection of extraterrestrial celestial bodies with weak gravitational environment and hard rock layers. The high-frequency micro-amplitude impactor can greatly reduce the drilling pressure and power consumption by using high-frequency impact to drill objects with high hardness such as rocks. Therefore, based on the piezoelectric transducer, a high-frequency micro-amplitude impactor is designed by analyzing the configuration of the horn and the collision system of the spring-mass system. It is verified that the no-load frequency of the impactor is above 1000Hz, and that the amplitude is about 0.2mm. Finally, the validity of the design of the high-frequency and micro-amplitude impactor is verified by the sandstone-drilling experiment.