| Title |
Hybrid high power piezoelectric drive for micro-stepping applications |
| Authors |
Mažeika, Dalius ; Vasiljev, Piotr ; Čeponis, Andrius ; Bareikis, Regimantas ; Struckas, Arūnas ; Borodinas, Sergejus |
| DOI |
10.20334/iwpma.2025-001-K |
| ISBN |
9786094763830 |
| eISBN |
9786094763847 |
| Full Text |
|
| Is Part of |
The 22nd International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA 2025), July 1–3, 2025 Vilnius, Lithuania : abstract proceedings.. Vilnius : Vilniaus Gedimino technikos universitetas, 2025. p. 40.. ISBN 9786094763830. eISBN 9786094763847 |
| Keywords [eng] |
piezoelectric actuator ; hybrid actuation system ; precise positioning |
| Abstract [eng] |
High-power piezoelectric motors used in stabilization systems, such as spacecraft control moment gyroscopes (CMGs), must achieve nanometric resolution and ensure stable operation. During continuous operation, stabilization adjustments are performed through microscale displacements of the motor within the same contact region. This type of operation causes intensive local wear, and as a result precision and durability of the piezoelectric motor are reduced. Moreover, the wearing of the contacting surface is non-uniform along the stator, potentially resulting in unpredictable rotor accelerations or even rotor locking. This study proposes a novel hybrid piezoelectric stabilization system that integrates a high-power inertial ultrasonic motor for rapid rotation of the CMG frame with a piezoelectric multilayer actuator that is used for high-precision positioning. The multilayer actuator is mounted on the inertial motor and serves a dual function: enabling precise microdisplacements and periodically shifting the contact zones along the stator to mitigate localized wear. Harmonic type excitation of the piezoelectric actuator induces nanometric scale displacements and allows achieving high precision motion of the system. By applying non-harmonic, pulse-type excitation to the actuator, inertial rotation of the motor is induced, enabling redistribution of the contact zones during fine-tuning operations. This approach allows previously unused, unworn stator surfaces to be employed, thereby maintaining motion precision and durability of the device. The concept of the novel hybrid stabilization system is presented along with numerical simulations and experimental investigations. The dynamic characteristics of the inertial motor and piezoelectric actuator were studied under microstepping conditions at both resonant and non-resonant modes. Motor dynamics were analyzed in response to various types of electrical input signals and load conditions. Results are presented and discussed, demonstrating the feasibility of the proposed system. |
| Published |
Vilnius : Vilniaus Gedimino technikos universitetas, 2025 |
| Type |
Conference paper |
| Language |
English |
| Publication date |
2025 |
