Polyimides having long flexible chains in the main chain were prepared by the condensation of α,ω di(4 aminophenoxy)alkane and hexafluoroisopropylidene bis(3,4 phthalic anhydride) followed by a chemical imidization.

Computer aided designing system for single axial symmetric flexible hinge;

Analysis on magnification ability and loading capacity of displacement magnification mechanism of flexible hinge;

Design and performance analysis on flexible hinged magnifying mechanism applied to piezoelectric piling-up pump;

Preparation of polyimide with flexible chains in the main chain and the groping application in fabric;

Adopting PZT as the micro-displacement driver and a kind of flexible joint as the guiding device,it compensates moving position of ball feed machine tools automatically and realizes the second precise orientation.

Adopting the actuator as the micro-displacement driver and a flexible joint as the guiding device, this mechanism compensates the moving position of the traditional lead-screw driven of working table machine tools automatically and realizes the secondary precise (positioning).

A kind of micro-positioning stage driven by piezoelectric actuator and guided by flexible joint is researched and designed for improving the precision of machining tools.

Design of micro-displacement amplifier based on flexure hinges

This paper aims at three typical flexure hinges, and analyzes the nonlinearity of the flexure hinges.

The compliance equations for double-axis elliptical flexure hinges are presented utilizing matrix theory, energy method, Castigliano’s displacement theorem and calculus knowledge, the analytical model predictions were confirmed by finite element analysis.

Piezoelectric stack pump based on flexure hinge magnification;

Multi-objective optimization for rotation capacity of flexure hinges;

Influence of manufacturing errors on the stiffness of a uniaxial circular flexure hinge;