A novel compliant linear guiding mechanism and analysis of kinetic precision

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A novel compliant linear guiding mechanism and analysis of kinetic precision

Article | 更新时间：2020-08-12

- A novel compliant linear guiding mechanism and analysis of kinetic precision
- Optics and Precision Engineering Vol. 16, Issue 4, Pages: 630-635(2008)
- 作者机构：
  
  北京航空航天大学
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：16 October 2007，
  
  Revised：11 December 2007，
  
  Published Online：22 April 2008，
  
  Published：22 April 2008
- 稿件说明：
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宗光华,裴旭,于靖军,毕树生. 一种新型柔性直线导向机构及其运动精度分析[J]. 光学精密工程, 2008,16(4):630-635

A novel compliant linear guiding mechanism and analysis of kinetic precision[J]. Optics and precision engineering, 2008, 16(4): 630-635.
宗光华,裴旭,于靖军,毕树生. 一种新型柔性直线导向机构及其运动精度分析[J]. 光学精密工程, 2008,16(4):630-635 DOI：

A novel compliant linear guiding mechanism and analysis of kinetic precision[J]. Optics and precision engineering, 2008, 16(4): 630-635. DOI：

摘要

Roberts机构是一种近似直线机构，由于机构中不存在交叉的杆件，使得它适合应用在一体化加工的柔性机构中，从而设计出大行程高精度的柔性直线导向机构。单个Roberts机构可由四个参数完全决定几何特征，其中轨迹点P的位置参数对机构运动直线度的影响最大。文中通过对Roberts柔性机构的伪刚体模型进行分析，说明了对应某一行程，轨迹点P的位置存在最优解使其运动直线度最高，并给出一种直线度等值线图方法确定最优解的大概位置，最后借助有限元方法进行进一步的优化。单个Roberts机构只能提供点的直线运动，可将两个Roberts机构进行并联得到一个柔性导向机构。本文对这种柔性导向机构进行了设计加工、仿真以及试验，结果表明这类柔性导向机构可以在毫米级行程时，垂直运动方向上的偏移小于1um。

Abstract

The Roberts approximate straight-line mechanism can be use to design new compliant linear guiding mechanism with large stroke and high precision. It is suitable for one-piece (monolithic) manufacturing due to there are no crossing parts in such a mechanism. A Roberts mechanism can be determined by four geometric parameters

and the location of the tracer P is the most important one. By analyzing the pseudo-rigid-body model of a Roberts mechanism

the location can be optimized to maximize the straight-line distance. A method based on the contour map of linearity is proposed to estimate the optimal value

then the finite element analysis is used for little adjustment. A linear guiding mechanism can be constructed by two Roberts mechanisms in parallel. Such a guiding mechanism is designed and fabricated. The finite element analysis and experimental results show that while its stroke is large than 1mm

the axis-offset can be limit within 1um

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Related Institution

Institute of Systems Engineering， China Academy of Engineering Physics

China Academy of Engineering Physics

School of Mechanical and Automotive Engineering，Shanghai University of Engineering Science

Changchun Institute of Optic， Fine Mechanics and Physics， Chinese Academy of Sciences

School of Computing and Engineering， University of Gloucestershire， Cheltenham

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