Intracycle angular velocity control of cross-flow turbines

Power and Velocity Control of Wind Turbines by Adaptive Fuzzy Controller during Full Load Operation

Research on wind turbine technologies have focused primarily on power cost reduction. Generally, this aim has been achieved by increasing power output while maintaining the structural load at a reasonable level. However, disturbances, such as wind speed, affect the performance of wind turbines, and as a result, the use of various types of controller becomes crucial.This paper deals with two ada...

Optimal Control of Rigid Body Angular Velocity with Quadratic Cost

In this paper we consider the problem of obtaining optimal controllers which minimize a quadratic cost function for the rotational motion of a rigid body We are not concerned with the attitude of the body and consider only the evolution of the angular velocity as described by Euler s equations We obtain conditions which guarantee the existence of linear stabilizing optimal and suboptimal contro...

Lizarralde and Wen: Attitude Control without Angular Velocity Measurement

Attitude Control without Angular Velocity Measurement: A Passivity Approach

It is well known that the linear feedback of the quar-ternion of the attitude error and angular velocity globally stabilizes the attitude of a rigid body. In this note, we show that the angular velocity feedback can be replaced by a nonlinear lter of the quaternion, thus removing the need of direct angular velocity measurement. In contrast to other approaches, this design exploits the inherent ...

Flow Control in Wells Turbines for Harnessing Maximum Wave Power

Oceans, and particularly waves, offer a huge potential for energy harnessing all over the world. Nevertheless, the performance of current energy converters does not yet allow us to use the wave energy efficiently. However, new control techniques can improve the efficiency of energy converters. In this sense, the plant sensors play a key role within the control scheme, as necessary tools for par...