References of "Darouach, Mohamed"
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See detailGlucose-Insulin System based on Minimal Model: a realisitic approach
Aguilera Gonzalez, Adriana UL; Voos, Holger UL; Darouach, Mohamed

in IEEE UKSim-AMSS Int. Conference on Modelling and Simulation, Cambridge, UK, 2015 (2015, March)

This paper presents a new approach to represent the glucose and insulin levels on patients with diabetes type 1 based on the well known minimal model. In this work it is proposed a new mathematical model ... [more ▼]

This paper presents a new approach to represent the glucose and insulin levels on patients with diabetes type 1 based on the well known minimal model. In this work it is proposed a new mathematical model that attempts modeling properly the exactly malfunction of this system. The model takes into account both: the description of the glucose level in the subcutaneous layer and a meal disturbance term. In silico simulations are used to evaluate the effectiveness of the proposed work. [less ▲]

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See detailA Formal Modeling Framework for Anaerobic Digestion Systems
Chaib Draa, Khadidja UL; Voos, Holger UL; Darouach, Mohamed

in IEEE UKSim-AMSS Int. Conference on Modelling and Simulation, Cambridge, UK, 2015 (2015, March)

The complexity of modeling the anaerobic digestion process meets the difficulty to describe and analyze them mathematically. In this paper, a simplified mathematical model for anaerobic digestion process ... [more ▼]

The complexity of modeling the anaerobic digestion process meets the difficulty to describe and analyze them mathematically. In this paper, a simplified mathematical model for anaerobic digestion process of organic matter, in a continuous stirred tank reactor is proposed. With the aim of upgrading the produced biogas and integrate biogas plants in a virtual power plant, new control inputs reflecting addition of stimulating substrates (acetate and bicarbonate) are added. Based on two step (acedogenesis-methanogenesis) mass balance non linear model, a step-by-step model parameter’s identification procedure is presented in the first step, then in the second step, the yield coefficients and the microbial growth rates are estimated when the later is assumed to be unknown a priori. [less ▲]

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See detailDesign and Simulation of a Real-Time Implementable Energy-Efficient Model-Predictive Cruise Controller for Electric Vehicles
Schwickart, Tim Klemens UL; Voos, Holger UL; Minaglou, Jean-Régis UL et al

in Journal of the Franklin Institute (2015), 352(2), 603-625

This paper presents the design of a novel energy-efficient model-predictive cruise controller for electric vehicles as well a simulation model of the longitudinal vehicle dynamics and its energy ... [more ▼]

This paper presents the design of a novel energy-efficient model-predictive cruise controller for electric vehicles as well a simulation model of the longitudinal vehicle dynamics and its energy consumption. Both, the controller and the dynamic model are designed to meet the properties of a series-production electric vehicle whose characteristics are identified and verified by measurements. A predictive eco-cruise controller involves the minimisation of a compromise between terms related to driving speed and energy consumption which are in general both described by nonlinear differential equations. Considering the nonlinearities is essential for a proper prediction of the system states over the prediction horizon to achieve the desired energy-saving behaviour. In this work, the vehicle motion equation is reformulated in terms of the kinetic energy of the moving vehicle which leads to a linear differential equation without loss of information. The energy consumption is modeled implicitly by exploiting the special form of the optimisation problem. The reformulations finally lead to a model-predictive control approach with quadratic cost function, linear prediction model and linear constraints that corresponds to a piecewise linear system behaviour and allows a fast real-time implementation with guaranteed convergence. Simulation results of the MPC controller and the simulation model in closed-loop operation finally provide a proof of concept. [less ▲]

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See detailDecentralized Dynamic Observer-Based Control for Large Scale Nonlinear Uncertain Systems
Gao, Nan; Darouach, Mohamed; Alma, Marouane et al

in American Control Conference ACC 2015, Chicago, USA (2015)

The objective of this paper is to propose a decentralized control for a class of large scale uncertain systems. These systems consist of interconnected subsystems where the nonlinear interconnections are ... [more ▼]

The objective of this paper is to propose a decentralized control for a class of large scale uncertain systems. These systems consist of interconnected subsystems where the nonlinear interconnections are quadratic bounded. The proposed control is based on a new form of dynamic observer (DO) and the popular used proportional observer (PO) and proportional integral observer (PIO) are only particular cases of it. The control method is derived from the solution of linear matrix inequalities (LMIs), on the basis of the algebraic constraints obtained from the analysis of estimation error. A numerical example is provided to illustrate the effectiveness of the proposed method. [less ▲]

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See detailGlucose-Insulin Minimal Model Augmented: Identification and Validation
Aguilera Gonzalez, Adriana UL; Voos, Holger UL; Darouach, Mohamed

in AMCA Congreso Nacional de Control Automatico 2015, Guernavaca, Mexico, 2015 (2015)

In this paper a new mathematical model of the glucose-insulin system is presented. The proposed model represents Type 1 Diabetes Mellitus patients and seeks to give a suitable model of the malfunction of ... [more ▼]

In this paper a new mathematical model of the glucose-insulin system is presented. The proposed model represents Type 1 Diabetes Mellitus patients and seeks to give a suitable model of the malfunction of the pancreas. Based on the classic minimal model, this new approach takes into account the description of the glucose dynamic in the subcutaneous layer and a meal disturbance term, together with an additional term that represents the insulin injections, which make this proposal a more realistic approach. Virtual data from UVA/Padova T1DMS software are used for rst evaluations of the effectiveness of the proposed model. [less ▲]

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See detailNonlinear protocols for distributed consensus in directed networks of dynamic agents
Li, Yumei UL; Voos, Holger UL; Darouach, Mohamed

in Journal of the Franklin Institute (2015), 352(9), 3645-3669

This paper deals with the distributed consensus problem of multi-agent systems. While existing work mainly considers the design of linear protocols, we derive nonlinear protocols for directed networks of ... [more ▼]

This paper deals with the distributed consensus problem of multi-agent systems. While existing work mainly considers the design of linear protocols, we derive nonlinear protocols for directed networks of dynamic agents with fi xed and switched topologies, respectively. The obtained nonlinear protocols have the same effectiveness as the existing linear protocols, however they can satisfy the input constraints of real world physical systems, as well as the state value restrictions of agents, which ensure the smooth communication of the whole network and the correct data transmission among agents under the limited bandwidth. In contrast to most existing approaches that commonly use the Lyapunov function theory in order to prove the consensus problem, simple and effective mathematical methods are developed here for this purpose. Based on the equivalent in fi nitesimal functions and differentials as well as linear approximations as comparatively simple mathematical tools, we prove that the distributed consensus is asymptotically reachable and derive the group decision values. For balanced topology structures, these nonlinear protocols in particular guarantee that the agents asymptotically reach an average-consensus. Furthermore, the obtained protocols relax the constraints on the communication links among the agents. Finally, simulations comprising the vertical alignment maneuver of a team of unmanned aerial vehicles (UAVs) and the phase synchronization of three oscillators are studied, respectively. The simulation results underline that the developed nonlinear protocols are effective and feasible for distributed consensus in directed networks of dynamic multi-agent systems. [less ▲]

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See detailH-infinity dynamic observer design for linear time invariant systems
Gao, Nan; Darouach, Mohamed; Voos, Holger UL et al

in 2014 IEEE 53rd Annual Conference on Decision and Control (CDC), Los Angeles, USA (2014, December)

This paper proposes an H-infinity dynamic observer (DO) for a class of linear time invariant (LTI) systems in the presence of disturbances. It generalizes the existing results on the proportional observer ... [more ▼]

This paper proposes an H-infinity dynamic observer (DO) for a class of linear time invariant (LTI) systems in the presence of disturbances. It generalizes the existing results on the proportional observer (PO), the proportional integral observer (PIO) and the DO. The design method is derived from a new formulation of linear matrix inequality (LMI), based on the solutions of the algebraic constraints obtained from the unbiasedness conditions of the estimation error. A numerical example is provided to show the applicability and performances of our observer. [less ▲]

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See detailH-infinity Adaptive Observer Design and Parameter Identification for a Class of Nonlinear Fractional-Order Systems
N'Doye, Ibrahima; Voos, Holger UL; Laleg-Kirati, Taous-Meriem et al

in 53rd IEEE Conference Decision and Control, CDC’14, Los Angeles, USA, 15-17 Dec. 2014 (2014, December)

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See detailH∞ decentralized dynamic-observer-based control for large-scale uncertain nonlinear systems
Gao, Nan; Darouach, Mohamed; Alma, Marouane et al

in IEEE Int. Conf. on Control, Decision and Information Technologies (CoDIT), Metz, France, 3-5 Nov. 2014 (2014, November)

In this paper an H∞ decentralized observer-based control is proposed for large-scale uncertain nonlinear systems. These systems are coupled by N interconnected subsystems where the interconnections ... [more ▼]

In this paper an H∞ decentralized observer-based control is proposed for large-scale uncertain nonlinear systems. These systems are coupled by N interconnected subsystems where the interconnections satisfy the quadratic constraints. The proposed control is based on a new form of dynamic observer (DO) which generalizes the existing results on the proportional observer (PO) and the proportional integral observer (PIO). The design approach is derived from the solution of matrix inequality and based on the algebraic constraints obtained from the analysis of the estimation error. A numerical example is provided to show the effectiveness of the proposed control. [less ▲]

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See detailA Stochastic Cyber-Attack Detection Scheme for Stochastic Control Systems Based on Frequency-Domain Transformation Technique
Li, Yumei UL; Voos, Holger UL; Darouach, Mohamed

in Au, Man ho (Ed.) International Conference on Network and System Security, NSS 2014, Xi'An, China, 15-17 October 2014 (2014, October 15)

Based on frequency-domain transformation technique, this paper proposes an attack detection scheme for stochastic control systems under stochastic cyber-attacks and disturbances. The focus is on designing ... [more ▼]

Based on frequency-domain transformation technique, this paper proposes an attack detection scheme for stochastic control systems under stochastic cyber-attacks and disturbances. The focus is on designing an anomaly detector for the stochastic control systems. First, we construct a model of stochastic control system with stochastic cyber-attacks which satisfy the Markovian stochastic process. And we also introduced the stochastic attack models that a control system is possibly exposed to. Next, based on the frequency-domain transformation technique and linear algebra theory, we propose an algebraic detection scheme for a possible stochastic cyber-attack. We transform the detector error dynamic equation into an algebraic equation. By analyzing the rank of the stochastic matrix E(Q (z0)) in the algebraic equation, residual information is obtained and anomalies in the stochastic system are detected. In addition, sufficient and necessary conditions guaranteeing the detectability of the stochastic cyber-attacks are obtained. The presented detection approach in this paper is simple, straightforward and more ease to implement. Finally, the results are applied to some physical systems that are respectively subject to a stochastic data denial-of-service (DoS) attack and a stochastic data deception attack on the actuator. The simulation results underline that the detection approach is efficient and feasible in practical application. [less ▲]

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See detailExponential Synchronization for a New Class of Complex Dynamical Network with PIPC and Hybrid TVD
Pan, Lin UL; Voos, Holger UL; Darouach, Mohamed

in IEEE Multi-Conference on Systems and Control, MSC 2014 (2014, October 08)

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See detailA Real-Time Implementable Model-Predictive Cruise Controller for Electric Vehicles and Energy-Efficient Driving
Schwickart, Tim Klemens UL; Voos, Holger UL; Darouach, Mohamed

in IEEE Multi-Conference on Systems and Control (MSC), Antibes, France, Oct. 2014 (2014, October)

This paper presents a novel energy-efficient model-predictive cruise control formulation for electric vehicles. The controller and the underlying dynamic model are designed to meet the properties of a ... [more ▼]

This paper presents a novel energy-efficient model-predictive cruise control formulation for electric vehicles. The controller and the underlying dynamic model are designed to meet the properties of a series-production electric vehicle whose characteristics are identified by measurements. A predictive eco-cruise controller involves the minimisation of a compromise between terms related to driving speed and energy consumption which are in general both described by nonlinear differential equations. In this work, a coordinate transformation is used which leads to a linear differential motion equation without loss of information. The energy consumption map is approximated by the maximum of a set of linear functions which is implicitly determined in the optimisation problem. The reformulations finally lead to a model-predictive control approach with quadratic cost function, linear prediction model and linear constraints that corresponds to a piecewise linear system behaviour and allows a fast real-time implementation with guaranteed convergence. Simulation results of the MPC controller in closed-loop operation finally show the effectiveness of the approach. [less ▲]

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See detailUncertainty Quantification of Group Synchronization and Control of a New Class of Adaptive Complex Dynamical Network with Brownian Motion and Time-varying Delay
Pan, Lin UL; Voos, Holger UL; Darouach, Mohamed

in Control Conference (CCC), 2014 33rd Chinese (2014, July 28)

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See detailRobust H ∞ cyber-attacks estimation for control systems
Li, Yumei UL; Voos, Holger UL; Darouach, Mohamed

in Proceedings of the 33rd CCC, Nanjing 28-30 July 2014 (2014, July 28)

This paper deals with the robust H ∞ cyber-attacks estimation problem for control systems under stochastic cyber-attacks and disturbances. The focus is on designing a H ∞ lter which maximize the attack ... [more ▼]

This paper deals with the robust H ∞ cyber-attacks estimation problem for control systems under stochastic cyber-attacks and disturbances. The focus is on designing a H ∞ lter which maximize the attack sensitivity and minimize the effect of disturbances. The design requires not only the disturbance attenuation, but also the residual to remain the attack sensitivity as much as possible while the effect of disturbance is minimized. A stochastic model of control system with stochastic cyber-attacks which satisfy the Markovian stochastic process is constructed. And we also present the stochastic attack models that a control system is possibly exposed to. Furthermore, applying H ∞ ltering technique-based on linear matrix inequalities (LMIs), the paper obtains suf cient conditions that ensure the ltering error dynamic is asymptotically stable and satis es a prescribed ratio between cyber-attack sensitivity and disturbance sensitivity. Finally, the results are applied to the control of a Quadruple-tank process (QTP) under a stochastic cyber-attack and a stochastic disturbance. The simulation results underline that the designed lters is effective and feasible in practical application. [less ▲]

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See detailRobust unified H_infinity dynamic observer design for uncertain systems
Gao, Nan; Darouach, Mohamed; Voos, Holger UL et al

in 33rd Chinese Control Conference (CCC), Nanjing, China, 28-30 July 2014 (2014, July)

In this paper, a new robust unifiedH∞ dynamic observer (UDO) design for systems in the presence of time-varying uncertainty and disturbances is presented. The observer design method is derived from the ... [more ▼]

In this paper, a new robust unifiedH∞ dynamic observer (UDO) design for systems in the presence of time-varying uncertainty and disturbances is presented. The observer design method is derived from the solution of the liner matrix inequality (LMI), based on the solution of the algebraic constraint obtained from the analysis of the estimation error. A numerical example is presented to show the performance of the proposed observer. [less ▲]

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See detailA Novel Model-Predictive Cruise Controller for Electric Vehicles and Energy-Efficient Driving
Schwickart, Tim Klemens UL; Voos, Holger UL; Minaglou, Jean-Régis UL et al

in A Novel Model-Predictive Cruise Controller for Electric Vehicles and Energy-Efficient Driving (2014, July)

This paper presents a novel energy-efficient model-predictive cruise control formulation for electric vehicles. A predictive eco-cruise controller involves the minimisation of a compromise between terms ... [more ▼]

This paper presents a novel energy-efficient model-predictive cruise control formulation for electric vehicles. A predictive eco-cruise controller involves the minimisation of a compromise between terms related to driving speed and energy consumption which are in general both described by nonlinear differential equations. In this work, a coordinate transformation is used which leads to a linear differential motion equation without loss of information. The energy consumption is modeled by the maximum of a set of linear functions which is determined implicitly by the optimisation problem and thus leads to a piecewise linear model. The reformulations finally result in a model-predictive control approach with quadratic cost function, linear prediction model and linear constraints that corresponds to a piecewise linear system behaviour and allows a fast real-time implementation with guaranteed convergence. The controller and the underlying dynamic model are designed to meet the properties of a series-production electric vehicle whose characteristics are identified by measurements. Simulation results of the MPC controller and the simulation model in closed-loop operation finally provide a proof of concept. [less ▲]

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See detailGroup Synchronization and Control of a New Class of Adaptive Complex Network with Brownian Motion and Time-varying Delay
Pan, Lin UL; Voos, Holger UL; Darouach, Mohamed

in Control Conference (ECC), 2014 European (2014, June 24)

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See detailChaos in a Fractional-Order Cancer System
N'Doye, Ibrahima; Voos, Holger UL; Darouach, Mohamed

in European Control Conference (ECC), Strasbourg, France, 24 - 27 June 2014 (2014, June)

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See detailCyber-attack detection based on controlled invariant sets
Rosich, Albert; Voos, Holger UL; Darouach, Mohamed

in European Control Conference (ECC), Strasbourg, France, 24-27 June 2014 (2014, June)

This paper explores a new method for detecting cyber-attacks on a controller. Specifically, the proposed detector is based on invariant sets in order to determine whether an attacker has hijacked the ... [more ▼]

This paper explores a new method for detecting cyber-attacks on a controller. Specifically, the proposed detector is based on invariant sets in order to determine whether an attacker has hijacked the controller and perpetrated a cyber-attack. One particularity of this detection method is that few information about the controller is required. Thus, the detector becomes useful for a large range of control laws and its vulnerability can be reduced by limiting its accessibility. Finally, a simple but significant example is presented in order to show the benefits and the flaws of the proposed methodology. [less ▲]

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See detailObserver Design for a Nonlinear Minimal Model of Glucose Disappearance and Insulin Kinetics
Boutat, Driss; Darouach, Mohamed; Voos, Holger UL

in The 7th International Conference on Bio-inspired Systems and Signal Processing BIOSIGNALS, Angers, France, 3-6 March 2014 (2014, March)

Detailed reference viewed: 104 (3 UL)