Real-time compliance control of an assistive joint using QNX operating system

  • Authors:

  • Shuang Gu;Cheng-Dong Wu;Yong Yue;Carsten Maple;Da-You Li;Bei-Sheng Liu

  • Affiliations:

  • Department of Computer Science and Technology, University of Bedfordshire, Luton, UK LU1 3JU;School of Information Science and Engineering, Northeastern University, Shenyang, China 110819;Department of Computer Science and Technology, University of Bedfordshire, Luton, UK LU1 3JU and Department of Computer Science and Software Engineering, Xi'an Jiaotong-Liverpool University, Suzho ...;Department of Computer Science and Technology, University of Bedfordshire, Luton, UK LU1 3JU;Department of Computer Science and Technology, University of Bedfordshire, Luton, UK LU1 3JU;Department of Computer Science and Technology, University of Bedfordshire, Luton, UK LU1 3JU

  • Venue:
  • International Journal of Automation and Computing
  • Year:
  • 2013

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Abstract

An assistive robot is a novel service robot, playing an important role in the society. For instance, it can amplify human power not only for the elderly and disabled to recover/rehabilitate their lost/impaired musculoskeletal functions but also for healthy people to perform tasks requiring large forces. Consequently, it is required to consider both accurate position control and human safety, which is the compliance. This paper deals with the robot control compliance problem based on the QNX real-time operating system. Firstly, the mechanical structure of a compliant joint on the assistive robot is designed using Solidworks. Then the parameters of the assistive robot system are identified. The software of robot control includes data acquisition and processing, and control to meet the compliance requirement of the joint control. Finally, a Hogan impedance control experiment is carried out. The experimental results prove the effectiveness of the method proposed.