D. Koenig

The effect of delays in cancer surgery due to the COVID-19 pandemic on cancer resectability and postoperative mortality in different tumor entities

Antonia Stengler, Jörg Kleeff, Lisa Rieder, James Glasbey et autres

Functional switched H∞ Proportional Integral observer applied for road bank and vehicle roll angles estimation

Lghani Menhour, D. Koenig, Brigitte d’Andréa-Novel

The estimation problem of the road bank angle and the roll vehicle angle is presented in this work. These angles play an important role for the vehicle stability and the Vehicle Dynamic Control (VDC). However, the estimation of these angles requires a …

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Static and Dynamic Data Reconciliation for an Irrigation Canal

Nadia Bedjaoui, Xavier Litrico, D. Koenig, J. Ribot-Bruno et autres

This paper deals with the problem of fault detection and isolation in irrigation canals. We have developed a method which combines static and dynamic data reconciliation for the validation of measurements, detection, and isolation of sensors and actuator faults and reconstruction of …

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Unknown Input Observers for Switched Nonlinear Discrete Time Descriptor Systems

D. Koenig, Benoît Marx, Denis Jacquet

In this paper, a linear matrix inequality technique for the state estimation of discrete-time, nonlinear switched descriptor systems is developed. The considered systems are composed of linear and nonlinear parts. An observer giving a perfect unknown input decoupled state estimation is proposed. …

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Design of observers for Takagi–Sugeno descriptor systems with unknown inputs and application to fault diagnosis

Benoît Marx, D. Koenig, José Ragot

A method for state-estimation of Takagi–Sugeno descriptor systems (TSDS) affected by unknown inputs (UI) has been presented here. For ease of implementation's sake, the proposed observers are not in descriptor form, but in usual form. Sufficient existence conditions of the unknown input …

fr (code pays fourni par la source)

Unknown Input Observers Design for Time-Delay Systems Application to An Open-Channel

D. Koenig, Nadia Bedjaoui, Xavier Litrico

This paper deals with the problem of full-order observers design for linear continuous delayed state and inputs systems with unknown input (UI) and time-varying delays. A method to design an Unknown Input Observer (UIO) for such systems is proposed based on a …

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Observer Design for Unknown Input Nonlinear Descriptor Systems via Convex Optimization

D. Koenig

This paper treats the design problem of full-order observers for nonlinear descriptor systems with unknown input (UI). Depending on the available knowledge on the UI dynamics, two cases are considered. First, a UI proportional observer (UIPO) is proposed when the spectral domain …

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Design of observers for descriptor systems with delayed state and unknown inputs

D. Koenig, Benoît Marx

This note deals with the problem of full-order observers design for a class of linear descriptor systems with delayed state and unknown inputs (UI). The objectives are twofold. Firstly, the design of a full-order unknown input observer for descriptor systems with delays …

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Design with of Observers for Descriptor Systems delayed state and unknown inputs

D. Koenig, Benoît Marx

Absfract-This note deals with the problem of full-order observers design for a class of linear descriptor systems with delayed state and Unknown Inputs (ur). The objectives are twofolds. Firstly, the design of an full-order Unknown Input Observer for descriptor systems with delays …

Robust control and fault detection synthesis with application to tractor-semitrailer automatic steering

S. Mammar, V.B. Baghdassarian, D. Koenig

Automatic steering of tractor-semitrailer is studied with integrated control, detection and isolation of sensor and actuator fault (FDI) in closed loop. We formulate both the steering control and the fault detection and isolation problems using LMI-based H/sub /spl infin// design. Controller reduction …

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H/spl infin/ fault detection and isolation for descriptor systems: a matrix inequalities approach

D. Koenig, Saïd Mammar, Benoît Marx

A linear matrix inequality (LMI)-based H/spl infin/ filtering formulation is presented for fault detection and isolation (FDI) problems of linear time-invariant descriptor systems. The fixed-order H/spl infin/ FDI filter design is characterized in terms of definite LMIs with no equality constraint. Using …

Observers for Linear Systems with Unknown Inputs

D. Koenig, Sara Nowakowski, A. Bourjij

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