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Real-time Distance Query and Collision Avoidance for Point Clouds with Heavy-duty Redundant Manipulator

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Details

Original languageEnglish
Title of host publication8th IEEE International Conference on Cybernetics and Intelligent Systems (CIS), Robotics, Automation and Mechatronics (RAM)
PublisherIEEE
Pages272-277
Number of pages6
ISBN (Electronic)978-1-5386-3135-5
DOIs
Publication statusPublished - 2017
Publication typeA4 Article in a conference publication
EventIEEE International Conference on Cybernetics and Intelligent Systems (CIS) and IEEE Conference on Robotics, Automation and Mechatronics (RAM) -
Duration: 1 Jan 2000 → …

Conference

ConferenceIEEE International Conference on Cybernetics and Intelligent Systems (CIS) and IEEE Conference on Robotics, Automation and Mechatronics (RAM)
Abbreviated titleCIS-RAM
Period1/01/00 → …

Abstract

This paper presents a real-time method for generating joint trajectories for redundant manipulators with collision avoidance capability. The coordinated motion control system of the heavy-duty hydraulic manipulator resolves joint references so that a goal position can be reached in real-time without any collisions. The proposed method is able to detect and prevent different types of possible collisions, including self-collisions and collisions with obstacles. When the control system detects the risk of collision, the collision server searches the points where the collision is about to occur and calculates the shortest distance between the colliding objects. The collision server is used to retain static point clouds and to calculate the shortest distance between objects that are too close to each other. The point clouds on the server are kept up to date with the manipulators' joint sensors and laser scanner-based measurements. During coordinated motion control, the joint trajectories of the redundant manipulator are modified so that the collisions can be avoided, while at the same time, the trajectory of the end-effector maintains its initial trajectory if possible. Results are given for a 4-DOF redundant heavy-duty hydraulic manipulator to demonstrate the capability of this collision avoidance control system.

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