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A single-degree-of-freedom piezoelectric turntable and its excitation method

A degree of freedom, piezoelectric technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc. problems, to achieve the effect of expanding applications and improving mechanical output performance

Active Publication Date: 2021-02-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims to propose a single-degree-of-freedom piezoelectric turntable and its excitation method to solve the problems of the existing single-degree-of-freedom piezoelectric drive device with complex support and limit structures, and difficulty in adjusting the friction force during operation.

Method used

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  • A single-degree-of-freedom piezoelectric turntable and its excitation method
  • A single-degree-of-freedom piezoelectric turntable and its excitation method
  • A single-degree-of-freedom piezoelectric turntable and its excitation method

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specific Embodiment approach 1

[0036] Specific implementation mode one: in combination with the instructions attached figure 1 And attached figure 2 This embodiment will be further described in detail. This embodiment provides a specific implementation of a single-degree-of-freedom piezoelectric turntable, a single-degree-of-freedom piezoelectric turntable, including an annular base 1, N two-dimensional piezoelectric actuators 2, and a disc mover 3. 2N axial fixing screws 4, N axial compression blocks 5, N radial fixing screws 6, wherein N is an even number greater than or equal to 6; N two-dimensional piezoelectric actuators 2 are divided into The upper and lower layers are evenly distributed on the circumference of the annular base 1, and each of the upper and lower layers includes N / 2 two-dimensional piezoelectric actuators 2; the N two-dimensional piezoelectric actuators 2 have the same structure; Each two-dimensional piezoelectric actuator 2 includes a rectangular base 2-1, a piezoelectric element 2...

specific Embodiment approach 2

[0037] Specific implementation mode two: in combination with the instruction manual image 3 This embodiment will be further described in detail. This embodiment provides a specific implementation in which a single two-dimensional piezoelectric actuator 2 realizes bending motion along two orthogonal directions A1 and A2. The two-dimensional bending motion that can be realized by a single two-dimensional piezoelectric actuator 2 is as follows: image 3 As shown, by applying an excitation voltage signal to the piezoelectric element 2-2, the positive and negative bending motions along the A2 axis can be realized: when the amplitude of the excitation voltage signal is positive, the two-dimensional piezoelectric actuation Device 2 produces a bending motion along the positive direction of the A2 axis, such as image 3 As shown in (a); when the amplitude of the excitation voltage signal is negative, the two-dimensional piezoelectric actuator 2 produces a negative bending motion alo...

specific Embodiment approach 3

[0038] Specific implementation mode three: in combination with the instruction manual Figure 4 to Figure 8 This embodiment will be further described in detail. This embodiment provides a specific implementation of the excitation method for a single-degree-of-freedom piezoelectric turntable. The Cartesian coordinate system XYZ is established with the center of the disc mover 3 as the coordinate origin, and the Z axis of the coordinate system is aligned with the disc mover 3. If the axes are collinear, then this excitation method can excite the disc mover 3 of the single-degree-of-freedom piezoelectric turntable to achieve counterclockwise or clockwise rotational motion output around the Z axis; the following description is a two-dimensional piezoelectric actuator 2 The case where the number N is equal to six.

[0039] The specific process of driving the disc mover 3 to rotate counterclockwise around the Z axis is as follows:

[0040] Step 1. Apply a slowly decreasing excitat...

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Abstract

The invention provides a single-degree-of-freedom piezoelectric turntable and an excitation method thereof, belonging to the field of piezoelectric drive technology. The single-degree-of-freedom piezoelectric turntable includes an annular base, N two-dimensional piezoelectric actuators, a disc mover, 2N axial fixing screws, N axial pressing blocks and N radial fixing screws , where N is an even number greater than or equal to 6; by designing one excitation voltage signal applied to the N two-dimensional piezoelectric actuators, controlling its timing and amplitude, the N two-dimensional piezoelectric actuators are excited to generate along the The outer bending motion of the disc mover along the tangential direction uses friction to drive the disc mover to achieve single-degree-of-freedom rotation; by adjusting the amplitude of another voltage signal applied to the two-dimensional piezoelectric actuator, the two-dimensional piezoelectric actuator is controlled. Friction between the electric actuator and the disc mover. The single-degree-of-freedom piezoelectric turntable of the invention has the advantages of no support, controllable frictional force, large stroke and high motion resolution, and has broad application prospects in the fields of precision driving and positioning.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric drive, and in particular relates to a single-degree-of-freedom piezoelectric turntable and an excitation method thereof. Background technique [0002] Piezoelectric drive technology refers to a precision drive technology that uses the inverse piezoelectric effect of piezoelectric materials to convert electrical energy into mechanical energy, and realizes the motion output of piezoelectric devices through specific actuation principles. This technology has high motion precision and anti-electromagnetic interference. , fast response, power-off self-locking and other advantages. In recent years, with the rapid development of biomedicine, optical engineering, and precision machining, they have put forward an urgent demand for precision rotary motion platforms. In view of the fact that the precision rotary motion platform using piezoelectric drive technology has significant advantages such as hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/12H02N2/14H02N2/00
CPCH02N2/0015H02N2/005H02N2/12H02N2/14
Inventor 刘英想张仕静邓杰刘军考陈维山
Owner HARBIN INST OF TECH
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