论文标题

机器人系统的安全 - 关键运动控制

Safety-Critical Kinematic Control of Robotic Systems

论文作者

Singletary, Andrew, Kolathaya, Shishir, Ames, Aaron D.

论文摘要

在过去的几十年中,运动控制器实际上对机器人系统中的设定点和轨迹跟踪等应用实际上很有用。为此,我们在本文中为运动学控制制定了一种新型的安全性范式。特别是,我们将控制屏障函数(CBF)的方法扩展到管理机器人系统的运动方程。我们证明了基于速度的CBF的纯运动实现,随后引入了一种确保动态级别安全性的公式。这是通过新形式的CBF来实现的,CBF将动能与经典形式结合在一起,从而最大程度地减少了模型依赖性和保守性。然后将方法扩展到不足的系统。在两个机器人平台上的仿真中证明了这种方法和纯运动的实现:一个6多型机器人操纵器和一个卡车杆系统。

Over the decades, kinematic controllers have proven to be practically useful for applications like set-point and trajectory tracking in robotic systems. To this end, we formulate a novel safety-critical paradigm for kinematic control in this paper. In particular, we extend the methodology of control barrier functions (CBFs) to kinematic equations governing robotic systems. We demonstrate a purely kinematic implementation of a velocity-based CBF, and subsequently introduce a formulation that guarantees safety at the level of dynamics. This is achieved through a new form CBFs that incorporate kinetic energy with the classical forms, thereby minimizing model dependence and conservativeness. The approach is then extended to underactuated systems. This method and the purely kinematic implementation are demonstrated in simulation on two robotic platforms: a 6-DOF robotic manipulator, and a cart-pole system.

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