Study of space-born precise tracking/pointing platform based on hexapod

This paper discussed platform providing high stability precise pointing functionality for space-born optical instruments based on hexapod. With the self-designed precision dual-driving hybrid actuators and hinges, a precision pointing Hexapod prototype was designed and manufactured. Considering the features of the precise pointing Hexapod, an experiment system was developed including macro-moving control system, micro-moving control system and measurement system. Primary experiments based on the Hexapod prototype and the experiment system was carried on. Results show that the rotational degree range of the platform exceeds 10°, maximum open-loop velocity is higher than 5 deg/s, static positioning error being less than 5μrad with the compensation of micro-moving stages of the hybrid actuators, and the disturbance amplitude can be reduced to noise level by PZT stages when active vibration control turn on.