Large-deflection flexure pivot is widely used in high precision rotation application,but there are less flexure configurations and simple and convenient design methods,This paper presents a novel large-deflection curv...Large-deflection flexure pivot is widely used in high precision rotation application,but there are less flexure configurations and simple and convenient design methods,This paper presents a novel large-deflection curved-compliant annulus-shaped flexure pivot composed of six curved beam flexure elements.It can offer more than lO^angular stroke theoretically.Firstly,main-motion pseudo-rigid-body method is introduced to establish the flexure pivot model.Although pseudo-rigid-body method can be used to analyze the large-deformation flexure pivot performance,the method is definitely a laborious and difficult task for designing this novel flexure pivot.In order to simply the designing process,dimension-design graphs based on the parametric models and finite element analysis is presented.Using the dimension-design method as a tool,the designers can determine the optimal geometry rapidly,based on the stiffness and rotation demands of an annulus-shaped flexure pivot.Finally,dimension-design graph examples are given whose primary design aims to achieve a rotation stroke of annulus-shaped flexure pivot.The finite element analysis results show that the relative designing error between anticipative rotation stroke and graph design result is less than 4%.The dimensionless method used in designing annulus-shaped flexure pivot can reduce design process in both time and complexity.The novel annulus-shaped flexure pivot and dimension-design method are helpful supplement to configuration and design method of large-deflection flexure pivot.展开更多
基金supported by National Natural Science Foundation of China(Grant No.50675007)Program for New Century Excellent Talents in University of China(Grant No.NCET-06-0165)
文摘Large-deflection flexure pivot is widely used in high precision rotation application,but there are less flexure configurations and simple and convenient design methods,This paper presents a novel large-deflection curved-compliant annulus-shaped flexure pivot composed of six curved beam flexure elements.It can offer more than lO^angular stroke theoretically.Firstly,main-motion pseudo-rigid-body method is introduced to establish the flexure pivot model.Although pseudo-rigid-body method can be used to analyze the large-deformation flexure pivot performance,the method is definitely a laborious and difficult task for designing this novel flexure pivot.In order to simply the designing process,dimension-design graphs based on the parametric models and finite element analysis is presented.Using the dimension-design method as a tool,the designers can determine the optimal geometry rapidly,based on the stiffness and rotation demands of an annulus-shaped flexure pivot.Finally,dimension-design graph examples are given whose primary design aims to achieve a rotation stroke of annulus-shaped flexure pivot.The finite element analysis results show that the relative designing error between anticipative rotation stroke and graph design result is less than 4%.The dimensionless method used in designing annulus-shaped flexure pivot can reduce design process in both time and complexity.The novel annulus-shaped flexure pivot and dimension-design method are helpful supplement to configuration and design method of large-deflection flexure pivot.
