Error Analysis of Spherical Tracking Servo Mechanism in Outside Laser Tracking Absolute Measurement System

A new type of outside laser tracking distance measuring system is developed in this paper.Based on the principle of laser tracking measuring system and dynamic response requirement of this system,the design concept of spherical tracking servo mechanism is adopted to design the two dimension(2D) rotating tracking servo mechanism,and also,the error analysis is conducted.The results indicate that this mechanism is characterised by simple structure,high tracking accurately and better dynamic performances and better practical use values.