卫星通信天线伺服系统的离散滑模控制算法研究

卫星通信天线伺服系统的离散滑模控制算法研究

内容简介：船载卫星天线易受干扰而导致跟踪精度和通信质量下降.为改善天线系统的性能,实现了基于DSP的天线伺服控制器,在设计的天线伺服系统中应用基于指数趋近率的离散滑模变结构控制算法,并且进行了设计分析和实验仿真.实验结果表明,基于此算法,较容易设计满足系统稳定性的离散控制器.与传统的PID算法相比,该算法具有较好的实时适应性,伺服系统对连续或突加干扰的敏感度大大下降,鲁棒性明显增强.

Abstract：Unsteady performance of satellite communication station on board tend to reduce the tracking precision and communication quality of the satellite communication antenna. To improve the performance of the system, an antenna servo controller based on DSP is developed. In the servo system, a new algorithm based on the exponential trending rule discrete sliding mode variable structure algorithm is used and theoretical analysis and experimental simulation are done. The result of experiment shows that a discrete controller and its control algorithm that satisfies the stability can be easily derived and developed. Compared with the traditional PID law, the new algorithm has much better performance on real-time adjustability. The sensitivity of the servo system to the continuous or unexpected disturbing can be greatly reduced and robustness is obviously strengthened.

作者：李洪科, 黄麟舒,

关键词：伺服系统, 卫星天线, 离散滑模控制, 鲁棒性,