Quantitatively analySes error factors that affect geometric lost motion of cycloidal gear, andbuild up mathematical model on the ge0mertic lost motion ca1cutation of cycloidal gear.

AnalySes and builds up the mathematical model on the geometric lost motion calculationof high accurate RV reducer used in robot, which can be verified through computer simulation andproductive practice.

Synthetical modeling on geometric error and thermal error of direct-drive hobbing machines;

Geometric Error Modeling and Measurement of Five-axis NC Machine Tools;

Research on Geometric Error Compensation Technology for 3-axis NC Milling Machine

The modeling analysis and compensation tactic of geometric errors for machining center;

In order to enhance the measurement precision of the cantilever type CMM,this paper introduces the quasi-rigid body mathematical model developed by analyzing every errors sources and depending on the theory of homogeneous coordinate and offers geometric errors model specially designed to compensate for the 21 geometric errors with a greater impact on measuring accuracy.

Analyse geometry warp between faucet body of stopcock and its plug becarse processing method and technics was analyzed;several methods of eliminating cone surface processing warp were Introduced and the best sealing effect was achieved.

Several coordinate measuring machine geometry error models of several kinds in common use are analyzed in this paper.

Based on curvilinear trajectory equations,the geometrical aberrations and their coefficients with second order approximation have been discussed,and the computational form also given in the paper.