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This work presents a set of cascade high gain observers for triangular nonlinear systems with delayed output measurement. A sufficient condition ensuring the exponential convergence of the observation error towards zero is given. This result is illustrated by some simulations.
This paper deals with the speed control of a permanent magnet synchronous generator (PMSG)-based marine current turbine (MCT). Indeed, to increase the generated power and therefore the efficiency of an MCT, a nonlinear controller has been proposed. PMSG has been already considered for similar applications particularly wind turbine systems using mainly PI controllers. However, such kinds of controllers...
In this paper, an adaptive output feedback controller of MIMO nonlinear systems with unknown constant parameters is considered. This controller obtained by simply combining an appropriate high gain state feedback control with a high gain adaptive observer. The convergence of the later is guaranteed under certain persistent excitation condition. Furthermore, it is shown that a filtered integral action...
Assuming a class of continuous-time observers known for a given nonlinear system, an observation structure is derived when sensors information is subject to network-induced communication constraints. The approach is based on the recent results on hybrid observers for sampled-data systems by Karafyllis and Kravaris. Considering two types of protocols, some asymptotic stability properties are shown...
This paper deals with the speed control of a variable speed DFIG-based marine current turbine. Indeed, to increase the generated power and therefore the efficiency of a marine current turbine, a nonlinear controller has been proposed. DFIG has been already considered for similar applications particularly wind turbine systems using mainly PI controllers. However, such kinds of controllers do not adequately...
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