Background. Possibility of using piezoelectric engines in various branches of instrument-making industry, increasing its resource characteristics, further research and improvement is a pressing issue. Objective. The aim of the paper is to research the resonance characteristics of a piezoelectric engine depending on the resource state. Methods. The research goal is achieved by creating test bench for studying the resonance characteristics of piezoelectric engine, measuring the resonance characteristics of piezoelectric engine depending on the resource state and analyzing the results obtained. Results. It was established that in the process of development there was a significant change in the resonance characteristics depending on number of accumulated turns. It is shown that the rotation speed and the resonant current don’t always increase with a decrease in the self-braking torque. The different behavior of the resonance characteristics for motor of the right and left rotation is determined, due to the wave effects that occur in the structural elements of the piezoelectric motor. From the point of view of resource potential of the piezoelectric engine, it has been established that the right-hand engine has greater resource potential than the left-hand engine, which must be addressed in its long-term operation. Conclusions. As a result of the research conducted, a stand was developed and tested to monitor the resonant characteristics of the engine depending on the number of accumulated cycles. Studies of changes in the resonant characteristics of the engine from the number of accumulated cycles to one million were carried out. Further research will be directed to study the ultra-acoustic structure of the effects arising from the left and right rotation motors in order to compensate them and increase the resource of the piezoelectric reverse rotation motor.
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