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Linear motion platform with ultrasonic-assisted friction overcoming function

A linear motion, ultrasonic-assisted technology, applied in the field of motion platforms, can solve problems such as difficult to establish high-precision friction models, complex compensation control methods, etc., and achieve the effect of simple structure, high positioning accuracy, and compact platform design

Pending Publication Date: 2018-05-11
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Friction occurs between contact surfaces with relative motion, and is affected by many factors such as relative acceleration, displacement, lubrication, and surface contact conditions, so it is difficult to establish a high-precision friction model, resulting in the need for complex compensation in motion control Control Method

Method used

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  • Linear motion platform with ultrasonic-assisted friction overcoming function
  • Linear motion platform with ultrasonic-assisted friction overcoming function
  • Linear motion platform with ultrasonic-assisted friction overcoming function

Examples

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Embodiment Construction

[0023] The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate this embodiment, certain components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable that some well-known structures and descriptions thereof may be omitted in the drawings. The positional relationship described in the drawings is for illustrative purposes only, and should not be construed as a limitation on this patent.

[0024] Such as Figure 1-3 As shown, the ultrasonic-assisted friction-overcoming linear motion platform includes a machine base 1, which carries all structures. The linear guide rail 2 is installed on the machine base. The linear motor driver is composed of a linear motor mover 6 and a linear motor stator 7 . Wherein, the linear motor mover 6 can apply a driving force to the workta...

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Abstract

The invention discloses a linear motion platform with an ultrasonic-assisted friction overcoming function. The linear motion platform mainly comprises a workbench, a piezoelectric stack, a flexible hinge set, an auxiliary mechanism, a driver and other parts. The auxiliary mechanism is composed of four identical plates which are in threaded connection with slide blocks, and the plates are connectedwith the workbench through the flexible hinge set in a threaded mode. The driver applies driving force to the workbench, so that flexible hinges are driven to generate elastic deformation, and directional displacement of the whole motion platform is achieved. The piezoelectric stack is installed between the two plates located on a same-side guide rail through studs, piezoelectric ceramics apply mechanical stress to the slide blocks, static friction force between the slide blocks and the guide rails is overcome, the situation that the accelerated speed is suddenly changed immediately due to friction state switching is prevented, the shaking phenomenon is eliminated, and positioning precision is improved.

Description

technical field [0001] The present invention relates to the technical field of motion platforms, and more specifically, to an ultrasonic-assisted friction-overcoming linear motion platform. Background technique [0002] Due to the characteristics of small size, high resolution, no noise and easy control, piezoelectric ceramics have been widely used in the design of high-speed precision motion platforms. In the high-speed precision motion platform, when the motion platform starts, stops or micro-feeds, its speed is relatively low, and the uncertainty of the surface roughness between the kinematic pairs will cause the amplitude of the frictional resistance to fluctuate, so that the motion platform A "crawling" phenomenon occurs. Under the action of the closed-loop control system, the driver will overcome the frictional resistance by increasing the driving force and compensate the positioning error of the motion platform. During the above compensation process, the motion plat...

Claims

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Application Information

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IPC IPC(8): B23Q1/26
CPCB23Q1/26
Inventor 杨志军何海超陈新白有盾
Owner GUANGDONG UNIV OF TECH
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