论文标题
基于输入共享控制障碍功能的浮动平台的安全自治对接演习
Safe Autonomous Docking Maneuvers for a Floating Platform based on Input Sharing Control Barrier Functions
论文作者
论文摘要
在本文中，我们提出了一种控制策略，以解决模仿卫星运动的平面浮动平台（SLISTRIDE）的安全自动对接问题。 Slider采用建议的策略，以正确的方向接近对接端口，保持安全的距离，同时始终在整个对接操作中的对接端口上保持视觉锁定。控制障碍功能旨在施加安全性，进近方向和视觉锁定限制。滑块的三个控制输入在执行约束时的三个障碍函数之间共享。事实证明，控制输入以无冲突的方式共享，以渲染定义安全性和视觉锁定约束向前不变的集合，并在建立有限的时间收敛到视觉锁定模式时。无冲突的输入共享确保了二次程序的可行性，该程序为标称控制器生成微不足道的校正，旨在跟踪对接端口，因此在整个码头操作中都尊重屏障约束。提出的控制设计方法的功效通过各种模拟得到验证。
In this article, we present a control strategy for the problem of safe autonomous docking for a planar floating platform (Slider) that emulates the movement of a satellite. Employing the proposed strategy, Slider approaches a docking port with the right orientation, maintaining a safe distance, while always keeping a visual lock on the docking port throughout the docking maneuver. Control barrier functions are designed to impose the safety, direction of approach and visual locking constraints. Three control inputs of the Slider are shared among three barrier functions in enforcing the constraints. It is proved that the control inputs are shared in a conflict-free manner in rendering the sets defining safety and visual locking constraints forward invariant and in establishing finite-time convergence to the visual locking mode. The conflict-free input-sharing ensures the feasibility of a quadratic program that generates minimally-invasive corrections for a nominal controller, that is designed to track the docking port, so that the barrier constraints are respected throughout the docking maneuver. The efficacy of the proposed control design approach is validated through various simulations.
