Coupled Mode Ultrasonic Motor Based on Anisotropic Eccentric Constraint and Barotropic Electroceramics

Abstract

The present invention provides a coupled mode ultrasonic motor based on heterodirectional eccentric constraints and barotropic electroceramics, which includes a stator unit and a mover unit. The driving foot, the lower left driving foot and the lower right driving foot, the cross-sections of the left and right oblique piezoelectric ceramics are parallelograms, and the upper left driving foot and the lower left driving foot are symmetrically arranged on the left side of the third-order bending vibration of the metal elastic body. At the point of maximum amplitude, the upper right driving foot and the lower right driving foot are symmetrically arranged on the right side of the third-order bending vibration of the metal elastic body. The coupled mode shapes for bending vibrations, so no mode degeneracy is required. At the same time, the longitudinal and torsional vibrations of the end baroclinic piezoelectric ceramics are used to jointly excite the coupled mode shapes of the metal elastic body, one longitudinal and three bending. The motor is compact in structure and relatively simple in design.

Description

technical field [0001] The invention relates to a coupling-mode ultrasonic motor based on different-direction eccentric constraints and slope piezoelectric ceramics. Background technique [0002] For linear standing wave ultrasonic motors, it can be divided into single-mode linear ultrasonic motors and multi-mode linear ultrasonic motors. For multi-mode linear ultrasonic motors, there are more longitudinal-bending composites, longitudinal-longitudinal composites, longitudinal-torsion composites, and bending-bend composites, and the research has been relatively complete. However, these current composite linear ultrasonic motors need to adjust the size of the stator unit to shorten the frequency of the vibration modes required for the two operations to achieve mode degeneracy, so that the two operating modes are simultaneously excited at the same frequency to form a Composite modes, so the design is more complex. [0003] The above problems should be considered and solved in...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a coupled-mode ultrasonic motor based on anisotropic eccentric constraints and slope piezoelectric ceramics to solve the problem in the prior art that the size of the stator unit needs to be adjusted to bring the vibration modes required for the two kinds of work closer. Mode degeneracy can be realized at a frequency of 100, so that two operating modes can be simultaneously excited at the same frequency to form a composite mode, which leads to complex structural design problems

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