Safety Control for UR-Type Robotic Manipulators via High-Order Control Barrier Functions and Analytical Inverse Kinematics

In robotics field, safety is an extensively researched subject. This article proposes an approach, which is based on high-order control barrier functions (HOCBFs) and computed torque control (CTC), for UR-type manipulators to guarantee safety while minimizing input changes. Since modeling accuracy i...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2024-06, Vol.71 (6), p.1-11
Main Authors: Lin, Juncheng, Zhai, Di-Hua, Xiong, Yuhan, Xia, Yuanqing
Format: Article
Language:English
Subjects:
Collision avoidance
Computed torque control (CTC)
control barrier functions (CBFs)
Exact solutions
Inverse kinematics
Kinematics
Manipulators
Obstacle avoidance
Optimization
Quadratic programming
Robot arms
Robot control
Robotics
Robots
Safety
safety control
Service robots
Torque control
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In robotics field, safety is an extensively researched subject. This article proposes an approach, which is based on high-order control barrier functions (HOCBFs) and computed torque control (CTC), for UR-type manipulators to guarantee safety while minimizing input changes. Since modeling accuracy influences the final performance, a novel analytic solution of inverse kinematics is proposed in this article with complete singularity analysis. Using CTC to construct a nominal controller, a quadratic program (QP) is formed by combining it with designed HOCBF constraints. Solving the QP, trajectory tracking can be achieved under particular safety constraints. The proposed approach has been validated on the UR3 robot in simulation and experiment, taking an obstacle avoidance task as safety constraints.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2023.3296810