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Observer-based nonlinear control of depth positioning of a spherical underwater robotic vehicle

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2 Author(s)
Loh, R.N.K. ; Center for Robot. & Adv. Autom., Oakland Univ., Rochester, MI, USA ; Karsiti, M.N.

The analysis and design of observer-based nonlinear control of depth positioning of a spherical underwater robotic vehicle (URV) is investigated. The observer is required for estimating accurately the unknown state variables in the full-state feedback control laws developed, whereby these control laws can be implemented with the unknown states replaced by their observer estimates. The input-output feedback linearization approach and design techniques are employed. Three approximation schemes for smoothing the signum function in the URV model are developed; these smoothing schemes are required for deriving the linearizing feedback control laws and the related results. Simulation results show that the introduction of observer-based nonlinear control would provide a robust method to stabilize and control the depth position of the URV.

Published in:

Intelligent and Advanced Systems (ICIAS), 2012 4th International Conference on  (Volume:2 )

Date of Conference:

12-14 June 2012

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