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Robotics 2018, 7(1), 7; https://doi.org/10.3390/robotics7010007

A Closed Loop Inverse Kinematics Solver Intended for Offline Calculation Optimized with GA

Department of Ocean Operations and Civil Engineering, Norwegian University of Science and Technology, Larsgaardsvegen 2, 6009 Aalesund, Norway
Received: 10 November 2017 / Revised: 8 January 2018 / Accepted: 12 January 2018 / Published: 22 January 2018
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Abstract

This paper presents a simple approach to building a robotic control system. Instead of a conventional control system which solves the inverse kinematics in real-time as the robot moves, an alternative approach where the inverse kinematics is calculated ahead of time is presented. This approach reduces the complexity and code necessary for the control system. Robot control systems are usually implemented in low level programming language. This new approach enables the use of high level programming for the complex inverse kinematics problem. For our approach, we implement a program to solve the inverse kinematics, called the Inverse Kinematics Solver (IKS), in Java, with a simple graphical user interface (GUI) to load a file with desired end effector poses and edit the configuration of the robot using the Denavit-Hartenberg (DH) convention. The program uses the closed-loop inverse kinematics (CLIK) algorithm to solve the inverse kinematics problem. As an example, the IKS was set up to solve the kinematics for a custom built serial link robot. The kinematics for the custom robot is presented, and an example of input and output files is also presented. Additionally, the gain of the loop in the IKS is optimized using a GA, resulting in almost a 50% decrease in computational time. View Full-Text
Keywords: inverse kinematics; robot control system; artificial intelligence; genetic algorithm inverse kinematics; robot control system; artificial intelligence; genetic algorithm
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Bjoerlykhaug, E.D. A Closed Loop Inverse Kinematics Solver Intended for Offline Calculation Optimized with GA. Robotics 2018, 7, 7.

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