The mechanical design and kinematics accuracy analysis of a fine tuning stable platform for the large spherical radio telescope

A large Stewart platform for fine tuning of the feed source tracing is pres ented in this paper. The model of kinematics control is developed with coor dinate transformation, and a quasi-static load analysis is made by virtual work principle with Jacobian matrix because the tracing speed is slow. The kinematics accuracy model is derived by position vector analysis, and the k inematics accuracy results are provided! It has shown that the designed Ste wart platform can satisfy the requirement of feed source trajectory control of large spherical radio telescope. (C) 2000 Elsevier Science Ltd. All rig hts reserved.