Design And Experimental Study Of A Percussive Ultrasonic Drill Driver

Drilling is an important way to detect celestial objects such as the Moon and the Mars.Percussive ultrasonic drills(PUD)have the advantages of simple structure,small volume,low energy consumption,low required drilling pressure,no lubrication,and so on,exhibiting significant advantages in extraterrestrial celestial exploration tasks.The influence of the load,environment and aging of the components cause the resonance frequency of the PUD to drift,this leads the drilling efficiency to drop sharply.This paper aims to track the resonance frequency of the PUD in real time,and maintain high drilling efficiency.Through theoretical analysis,simulation,and experiments,the driving characteristics of the PUD were studied,and the PUD’s driver was developed.Mechanical structure,components and working principle of PUD were studied.The parameters of the transducer were analyzed and the mathematical model of the transducer was established.Based on the mathematical model of the transducer,the driving characteristics of the transducer were analyzed;the reasons for the failure of the transducer driven by the phase-locked loop method are analyzed,and the impedance matching of the transducer was performed.Based on the transducer driving characteristics,the driving characteristics of the PUD were studied.Based on operating principle and driving characteristics of the PUD,driving circuit was designed.According to the PUD driving characteristics,the driving circuit of the driver was designed to generate the driving signal with amplitudes of 300 V to 400 V,frequency range of 10 k Hz to 20 k Hz,frequency resolution of 0.01 Hz.Based on the transfer function of the driver circuit,the parameters of the driver circuit are improved,and the drive signal of the driving circuit is optimized.Based on driving characteristics,self-resonance control of the PUD was studied.Based on the transducer driving characteristics,the signal acquisition module was designed and the time characteristics and stability of the signal acquisition module were analyzed and the transducer self-resonance control algorithm was designed.Based on the transducer self-resonance control algorithm,the self-resonant control algorithm and the constant amplitude control algorithm of the PUD was studied to improve the stability of the PUD drilling.Driving transducers and the PUD by different methods to test the driving effect of the driver.Driving the PUD under different conditions to test the driving stability under different conditions of the driver.Driving the PUD under load by different methods to compare the working stability of the PUD under two driving methods.Provides a technical reference for asteroid drilling and sampling tasks.