On-Orbit High-Accuracy Pointing Control for Large Mesh Deployable Antenna

Taking the large mesh deployable antenna( LMDA) as an object,the high accuracy and stability pointing control for LMDA optical axis is studied. The dynamics model for the LMDA pointing is firstly presented based-on the Craig-Bampton method. The PD feedback and notch filter are designed to suppress the vibration of the LMDA.Furthermore,the factors affecting LDMA pointing are discussed,and a modified controller with a regulation filter is proposed to reduce the periodic errors,and then improve the pointing accuracy and stability. Numerical simulations are finally provided and compared with present methods. The results demonstrate that the proposed control algorithm can guarantee the stability of LMDA pointing,reduce pointing errors and have better robustness to disturbances and vibration.