Saturated Visual-Servoing Control Strategy for Nonholonomic Mobile Robots with Experimental Evaluations

Ricardo Perez-Alcocer, Luis Gonzalo Montoya-Villegas, Angel Eduardo Lopez-Martinez, Javier Moreno-Valenzuela

Research output: Contribution to journalArticlepeer-review

Abstract

A novel saturated visual control strategy for nonholonomic mobile robots is presented. The principal focus is to deal with the stabilization problem. The saturation bounds for the control actions avoid exceeding the physical restrictions of the actuators. This feature is the main difference concerning related works. The closed-loop system is analyzed using the theory of non-autonomous cascade systems, and global uniform asymptotic stability is guaranteed. Experimental validation is carried out by using a unicycle-type mobile robot with an onboard camera. The experiment consists of stabilizing the robot in a preset pose using visual information. The experimental results are compared with a literature unsaturated visual servoing strategy. The results confirm the effectiveness of the proposed approach, completing the assigned task and bounding the control inputs.

Original languageEnglish
JournalIEEE Access
DOIs
StateAccepted/In press - 2021

Keywords

  • Cameras
  • Mobile robot
  • Mobile robots
  • real-time experiments
  • Robots
  • saturated control
  • Stability analysis
  • stabilization problem
  • Task analysis
  • visual servoing
  • Visual servoing
  • Visualization

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