Search

In this work, we consider the optimization problem of ocean wave energy absorption in oscillating-body systems. A solution based on discrete-time extremum seeking control is proposed to improve the mean extracted power by a power take-off (PTO) mechanism under different wave climates. Two different PTO mechanisms are considered: a linear and a non-linear one. Simulation results, obtained from an oscillating-body system subject to incident regular and irregular waves, are presented to show the feasibility of the proposed scheme.

Inertially stabilized platforms are subject of interest to different engineering areas, such as telecommunications, robotics and military systems. The objective is to maintain the attitude of a desired object constant despite the movements of a host vehicle, in order to point towards a chosen direction. This paper deals with the platform stabilization problem in the case where only two gyroscopic sensors are available. In this case, certain restrictions to vehicle dynamics are considered. Sensor positioning and sensitivity analysis to unmodeled motion are also discussed. An extension to the visual tracking problem is presented using a class of algorithms for fast digital image registration.