大型索网式可展开天线在轨高精度指向控制

以星载大型索网式可展开天线为对象，研究在轨工作过程中天线视轴高精度高稳定度指向控制方法。首先，基于Craig-Bampton法建立表征天线指向的动力学模型；然后针对天线振动对视轴指向的影响，设计PD反馈+陷波滤波器的控制算法；进一步分析影响指向精度的因素，设计带有调节滤波器的改进控制器以减小天线视轴指向的周期性误差，提高指向精度与稳定度。最后，给出数值仿真校验的结果并与现有的方法进行比较。结果表明，所提出的控制算法在保证天线指向稳定的同时，可以有效减小天线视轴的指向偏差，并对干扰与振动具有良好的鲁棒性。

#br# 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.