SHI Dong1,2, ZHOU Weihu2, LAO Dabao2

 

(1. College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology,

 

Beijing 100124, China; 2. Academy of OptoElectronics, Chinese Academy of Sciences, Beijing 100094, China)

 

 

Abstract: Aiming at the problems of rotary precision and stability of the turntable become major factors in the system accuracy with the development of the precision of angle sensor, the turntable shafting design was investigated. The shafting of onedimensional precision turntable was designed and its finite element analysis was conducted. The influence on the rotary precision of the shafting caused by the main components was studied using static analysis; the dynamics of natural frequencies and mode shapes of shafting was analyzed. An angle measurement precision test platform of turntable was built. The autocollimator combined with multimirror polyhedron was used to get angle measurement error directly, and the error compensation of harmonic analysis was studied. The results indicate that the final angle precision reach to ±1.5″, proved the design of turntable is feasible.

 

Key words: system accuracy; precision turntable; finite element analysis; error compensation