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In this paper, a new pose estimation solution for perspective vision system is presented and applied to a civil aircraft landing phase. Vision sensor is used to overcome the need for external technologies and runway knowledge. Two nonlinear observers are proposed for on-line estimation of the deviations of the aircraft w.r.t. the runway. These nonlinear observers are based, first, on a high-gain approach,...
This paper proposes an original solution for the observation of nonlinear uncertain systems. Features of this observer based on high order sliding modes are a finite and a priori known convergence time, robustness against unstructured (even unmatched) uncertainties and limited chattering. This is, as far as the authors known, the first observer structure which garantees an a priori known convergence...
This paper presents two perturbation observers for an electropneumatic system: the first one is based on differentiation by higher order sliding mode theory, whereas the second one is based on high gain approach. The main interest of these observers is the estimation of a perturbation external force, which offers the possibility to improve the robustness of the control law. Observability analysis...
This paper deals with a planar biped. The aim of this paper is the estimation, during the imbalance phases of a walking cyclic gait, of its absolute orientation by only using the measurement of the actuated joint variables. The main contribution is the experimental evaluation of an original finite-time convergent-posture observer.
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