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首页> 外文期刊>Journal of aerospace engineering >Adaptive Control for Spacecraft Rendezvous Subject to Time-Varying Inertial Parameters and Actuator Faults
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Adaptive Control for Spacecraft Rendezvous Subject to Time-Varying Inertial Parameters and Actuator Faults

机译:宇宙飞船集合的自适应控制受到时变的惯性参数和执行器故障的影响

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摘要

A novel adaptive fault-tolerant control strategy is proposed for a spacecraft rendezvous maneuver. The six-degree-of-freedom (6-DOF) nonlinear model is expressed in the pursuer's body frame, which consists of relative attitude and orbit dynamics in the presence of unknown time-varying inertia parameters, bounded disturbances, and actuator faults. A continuous adaptive control strategy is developed for the pursuer where a modification term and projection algorithm are employed in the adaptation laws to ensure the estimates of the unknown parameters remain positive and bounded. It is proven that the proposed strategy ensures the ultimate boundedness of all the signals in the closed-loop system and the asymptotic stability of the relative dynamics. Numerical simulations verify the effectiveness of the proposed control strategy.
机译:提出了一种新的自适应容错控制策略,用于航天器会合机动。六维自由度(6-DOF)非线性模型在追求者的身体框架中表示,该框架包括在未知的时变惯性参数,有界扰动和执行器故障的存在下的相对姿态和轨道动力学。为追求者开发了一种连续的自适应控制策略,其中在适应法中采用修改项和投影算法,以确保未知参数的估计保持正面和界限。据证明,所提出的策略确保了闭环系统中所有信号的最终界限和相对动态的渐近稳定性。数值模拟验证了所提出的控制策略的有效性。

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