The attitude tracking control problem for a satellite with parameter uncertainties and external disturbances is considered in this paper. For this class of multi-input multi-output uncertain nonlinear systems, a design method of robust output tracking controllers is proposed based on the upper-bounds of the uncertainties. Using the input/output feedback linearization approach and Lyapunov method, a control law is designed, which guarantees that the system output exponentially tracks the given desired output. The proposed controller is easy to compute and complement. Simulation results show that, in the closed-loop system, precise attitude control is accomplished in spite of the uncertainties in the system.
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Simulation results indicate, although the performance of systems employing estimation method of adding window linear prediction based on MMSE law is almost as same as that of other methods in low SNR, it is better than that of other algorithms in high SNR region.
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仿真结果表明，该算法不仅保证了全局收敛性，而且大大提高了算法的收敛速度和稳定性。
The simulation results indicate that this algorithm not only guarantees global convergence, but also improves the converging rate and the stability effectively.
仿真结果表明，基于SVD的非线性滤波算法对干扰有很强的抑制能力，较好地改善了系统的性能。
The simulation results show that the SVD-based nonlinear filtering algorithm has great interference suppression ability, and improves the performance of the system.
仿真结果表明，ATLMM不仅为移动节点提供了自适应的协议选择，而且降低了总体的域外注册开销。
Simulation results showed that ATLMM not only provided adaptive protocol selection for mobile nodes, but also decreased the overall inter-domain registration cost.
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