Floriane Anstett-Collin

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A general framework and a systematic methodology for the cryptanalysis of a large class of chaotic cryptosystems are proposed. More precisely, it is tested, a priori, during the design stage, whether the parameters of a chaotic cryptosystem may play the role of the secret key or not. Robustness against brute force attacks is first considered. A connection(More)
In this article, we address the issue of conducting a sensitivity analysis of complex models with both static and dynamic uncertain inputs. While several approaches have been proposed to compute the sensitivity indices of the static inputs (i.e. parameters), the ones of the dynamic inputs (i.e. stochastic fields) have been rarely addressed. For this(More)
When a vehicle equipped with tire is manoeuvred on the ground, the tires are submitted to a number of forces – longitudinal force when driving or braking torque is applied to the wheel and/or lateral force when the wheel is steered to turn at a corner. Pacejka model describes these forces that represent the reaction of the road onto the tire. This nonlinear(More)
A new adaptive synchronization scheme achieving a joint state and parameter estimation is proposed as an alternative to the well-known Extended Kalman Filter based on a first order approximation. It involves a polytopic observer which does no longer require a linearization. The resulting adaptive synchronization is global and holds for a large class of(More)
Global sensitivity has mainly been analyzed in static models, though most physical systems can be described by differential equations. Very few approaches have been proposed for the sensitivity of dynamic models and the only ones are local. Nevertheless, it would be of great interest to consider the entire uncertainty range of parameters since they can vary(More)
This paper studies two tyre models, the Fiala model and the Pacejka model. Both models are nonlinear and depend on parameters which must be identified from measurement data. A major problem is to efficiently prepare and plan the experiments. It is necessary to determine the parameters which have the greatest influence on the model output, and account for(More)
A sensitivity analysis of a suspension model has been performed in order to highlight the most influential parameters on the sprung mass displacement. To analyse this dynamical model, a new global and bounded dynamic method is investigated. This method, based on the interval analysis, consists in determining lower and upper bounds including the dynamic(More)
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