Stabilization of Underwater Glider by Buoyancy and Moment Control: Feedback Linearization Approach

부력 및 모멘트 제어를 이용한 수중글라이더의 안정화: 피드백 선형화 접근법

  • Received : 2014.07.02
  • Accepted : 2014.12.15
  • Published : 2014.12.31


This paper addresses a feedback linearization control problem for the nonlinear dynamics of an underwater glider system. We consider the buoyancy and moment as control inputs, which come from the mass variation and elevator control, respectively. Moment-to-force coupling increases the nonlinearities, which make the controller design difficult. By using a feedback linearization technique, we convert the nonlinear underwater glider to an equivalent linear model and design a linear controller. The controller for the equivalent converted linear system is designed using sufficient conditions in terms of linear matrix inequalities. Then, the control input of the nonlinear model of an underwater glider is formulated from the linear control input. An experimental examination is implemented to verify the effectiveness of the proposed technique.


Nonlinear dynamics;Underwater glider;Feedback linearization;Moment-to-force coupling;Buoyancy;Moment


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