Desynchronization of coupled phase oscillators, with application to the Kuramoto system under mean-field feedback

International audienceThis note introduces two notions of desynchronization for interconnected phase oscillators by requiring that phases drift away from one another either at all times or in average. It provides a characterization of each of these two notions based on the grounded variable associated to the system, and relates them to a classical notion of instability valid in Euclidean spaces. An illustration is provided through the Kuramoto system, which is shown to be desynchronizable by proportional mean-field feedback

Continuous-discrete adaptive observers for state affine systems

International audienceThe observation of a class of multi-input multi-output (MIMO) state affine systems with constant unknown parameters and discrete time output measurements is addressed. Assuming some persistent excitation conditions to hold and the sampling steps to satisfy some boundedness hypotheses, system observability is ensured and a class of global exponential observers is synthesized

Cascade High Gain Predictors for a Class of Nonlinear Systems

International audienceThis work presents a set of cascade high gain predictors to reconstruct the vector state of triangular nonlinear systems with delayed output. By using a Lyapunov-Krasvoskii approach, simple sufficient conditions ensuring the exponential convergence of the observation error towards zero are given. All predictors used in the cascade have the same structure. This feature will greatly improve the easiness of their implementation. This result is illustrated by some simulations

Position Paper On Systems and Control in FP8

Contribution of systems and Control science and technology to the challenges of future engineering systems- Recommendations for a European Research AgendaThe aim of this report, supported by major industrials and academia, is to demonstrate that CONTROL is at the heart of the Information and Communication Technologies of complex systems and as a consequence should be supported as a priority in the coming Work Programmes both at the level of enabling technologies and at application level, including PPP "Public Private Partnership" on Energy-efficient buildings, Factories of Future and European Green cars Initiatives. After recalling what control science is, ten crucial needs of society where control will make a strong impact in the next decade are sketched. The next section summarizes some of the main challenges behind these applications without describing methodologies and tools. This is followed by a list of new sectors where control will have also very probably a major role to play. Finally some operational recommendations are listed in order to provide the means to develop this extremely important scientific and technological discipline whose critical role in ICT is essential to meet European Policies in the future

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