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A Combined Speed and Finite-Time Yaw Controller for an Underactuated Unmanned Surface Vessel Using Way-Point Navigation

[+] Author Affiliations
Brendan Baker, Chunjiang Qian, Brent Nowak

University of Texas at San Antonio, San Antonio, TX

Paper No. DETC2013-12260, pp. V004T08A002; 10 pages
doi:10.1115/DETC2013-12260
From:
  • ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 4: 18th Design for Manufacturing and the Life Cycle Conference; 2013 ASME/IEEE International Conference on Mechatronic and Embedded Systems and Applications
  • Portland, Oregon, USA, August 4–7, 2013
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5591-1
  • Copyright © 2013 by ASME

abstract

This paper focuses on the speed and yaw control problem for an underactuated unmanned surface vessel (USV) with only two propellers navigating through multiple way-points using the line-of-sight (LOS) algorithm. The speed and yaw dynamics are transformed into a cascaded nonlinear system that can be reduced to the stabilization control problem of the surge and yaw subsystems. The proposed surge speed controller uses a distance and heading error feedback control to vary its speed accordingly while the heading subsystem is stabilized via a finite-time controller. Comparisons of the traditional yaw rate stabilization control techniques are made with the proposed finite-time controller and shown to be inferior to the finite-time controller in terms of convergence rate and robustness. The stability and effectiveness of the proposed control system is demonstrated and validated by simulation results of a modeled kayak.

Copyright © 2013 by ASME

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