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Nonlinear observer and output feedback attitude control of spacecraft

机译:航天器的非线性观测器和输出反馈姿态控制

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摘要

The problem of controlling a spacecraft by measuring only the angular position (roll, pitch, and yaw) is considered. A nonlinear observer is proposed which asymptotically reconstructs all the spacecraft state variables; if the spacecraft actuators are reaction wheels, the angular velocities of the wheels also must be measured. It is shown that if the observer is used in connection with asymptotically stable state feedback controllers, the extended system (spacecraft, controller, and observer) is still asymptotically stable. Simulation results are reported to illustrate the dynamic behavior of the observer.
机译:考虑了仅通过测量角位置(侧倾,俯仰和偏航)来控制航天器的问题。提出了一种非线性观测器,可以渐近地重构所有航天器状态变量。如果航天器的执行器是反作用轮,则还必须测量其角速度。结果表明,如果将观察者与渐近稳定状态反馈控制器结合使用,则扩展系统(航天器,控制器和观察者)仍然是渐近稳定的。报告了仿真结果,以说明观察者的动态行为。

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