A nonlinear disturbance observer based adaptive control scheme for an underwater manipulator

Abstract

A new nonlinear disturbance observer based tracking control scheme for an underwater manipulator is presented in this paper. This observer overcomes the disadvantages of existing disturbance observers, which are designed or analyzed by the linear system techniques. The performance of the proposed tracking control scheme is demonstrated numerically by the payload compensation and interaction effects compensation for a two degrees of freedom vertical underwater manipulator. © 2012 Springer-Verlag.