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首页> 外文会议>International Conference on Information Science and Control Engineering >An Integrated Trajectory Guidance and Attitude Control Law with Enhanced Anti-Disturbance Capability for Mars Pinpoint Landing
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An Integrated Trajectory Guidance and Attitude Control Law with Enhanced Anti-Disturbance Capability for Mars Pinpoint Landing

机译：具有增强的抗干扰能力的火星精确着陆综合轨迹制导和姿态控制定律

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Guidance and control accuracy could be essentially improved by using the unified algorithm for a Mars lander compared with the traditional algorithm and a novel integrated trajectory guidance and attitude control law is presented in this paper. In a Mars mission there will be various disturbances and the actual trajectory and attitude of a Mars lander will be directly affected seriously. In the proposed algorithm the effect of major disturbance could be estimated through a disturbance observer and then it will be incorporated in the feed-forward compensation. And the residual other disturbances could be attenuated by the multiple sliding surfaces techniques. Such a composite hierarchical framework is composed of the feedforward compensation and the feedback control. This strategy does not require a pre-computed reference trajectory and it could be applied to reduce the conservatism of the system. Its global stability is verified using Lyapunov-based approach. Simulation results show that this algorithm could guide and control the Mars lander safely and accurately according to the Mars mission, which has enhanced anti-disturbance capability comparing with traditional law in the presence of disturbances.
机译：与传统算法相比，采用统一的火星着陆器算法可以实质上提高制导和控制精度，并提出了一种新颖的综合轨迹制导和姿态控制律。在火星飞行任务中，会受到各种干扰，火星着陆器的实际轨迹和姿态将受到严重影响。在提出的算法中，可以通过扰动观测器估计主要扰动的影响，然后将其合并到前馈补偿中。剩余的其他干扰可以通过多重滑动表面技术来衰减。这样的复合层次结构框架由前馈补偿和反馈控制组成。该策略不需要预先计算的参考轨迹，可以用于减少系统的保守性。使用基于Lyapunov的方法验证了其全局稳定性。仿真结果表明，该算法能够根据火星任务安全，准确地对火星着陆器进行控制和控制，与存在干扰的传统规律相比，具有增强的抗干扰能力。

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