Advances in Space Research ( IF 2.6 ) Pub Date : 2021-07-29 , DOI: 10.1016/j.asr.2021.07.027 Rong Chen 1 , Yuzhu Bai 1 , Yi Wang 2 , Zhijun Chen 1 , Yong Zhao 1 , Tao Sheng 1
Autonomous spacecraft proximity technology is vital for current and future on-orbit service missions, especially to solve the difficult problem of ultra-close-range safe proximity to complex-shaped spacecraft. This paper designs a novel Gaussian mixture model (GMM) based artificial potential function (APF) to describe the movement constraint, which is generated by the complex shape of the target spacecraft. Next, a novel GMM-FTC controller is designed by combining fixed-time control (FTC) with GMM-APF. The proposed GMM-FTC not only retains the advantages of FTC method, whose stabilization time is independent of the initial state, but also solves the collision avoidance in the presence of complex shape obstacle. Finally, numerical simulation verifies the effectiveness of the developed method.
中文翻译:
基于高斯混合模型的复杂形状障碍航天器安全接近固定时间控制
自主航天器接近技术对于当前和未来的在轨服务任务至关重要,尤其是解决复杂形状航天器超近距离安全接近的难题。本文设计了一种新的基于高斯混合模型 (GMM) 的人工势函数 (APF) 来描述由目标航天器的复杂形状产生的运动约束。接下来,通过将固定时间控制(FTC)与 GMM-APF 相结合,设计了一种新颖的 GMM-FTC 控制器。所提出的 GMM-FTC 不仅保留了 FTC 方法的优点,其稳定时间与初始状态无关,而且解决了存在复杂形状障碍物时的防撞问题。最后,数值模拟验证了所开发方法的有效性。