EPJ manuscript No. (will be inserted by the editor) A new control strategy for shape memory alloy... more EPJ manuscript No. (will be inserted by the editor) A new control strategy for shape memory alloys actuators ⋆
Abstract The main goal of this paper is to propose some analytical or pseudo-analytical tools fac... more Abstract The main goal of this paper is to propose some analytical or pseudo-analytical tools facilitating the study and modeling of SMA helical spring-based actuators. Particular attention is paid to R-phase SMA helical spring-based actuators (i.e., springs made in NiTi and concerned by R-phase transformation phenomena). First, simplified models (i.e., based on beam theory framework) of R-phase SMA helical springs taking into account detwinning and assisted two-way memory effect are proposed and validated. Then, these models are used to determine the thermo-mechanical behavior of a linear bias-spring actuator. An actuator is built and used to validate the proposed models.
IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016
This paper deals with a hybrid control scheme for two-phase interleaved boost converter devoted t... more This paper deals with a hybrid control scheme for two-phase interleaved boost converter devoted to renewable energy and automotive applications. The control requirements, resumed in low input current ripples, are formulated as an optimal limit cycle stabilization problem, and are solved using hybrid systems formalism. The closed-loop consists in associating each discrete mode to a clearly defined region of the state space, in such a way that the optimal limit cycle is stabilized asymptotically. Mathematical proofs are provided alongside simulations to illustrate the effectiveness and the robustness of the proposed controller, especially with the use of a fuel cell as an input source.
In this paper, a new real-time implementation of a non-linear controller multivariable for multim... more In this paper, a new real-time implementation of a non-linear controller multivariable for multimachine power systems is outlined. The experimental setup of this power system includes two dc motors and two syn-chronous machines interconnected. The power system is modeled using a new decentralized modeling approach. Some responses of the system when the load changes after a sudden fault are presented. It is also shown that the system still keeps transient stability for slightly more severe faults .
IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468)
Abstract This paper presents a variable speed constant frequency system (VSCF) for aircraft appli... more Abstract This paper presents a variable speed constant frequency system (VSCF) for aircraft applications. The system consists in a doubly fed induction generator (DFIG) connected to a stand-alone aircraft grid through its stator windings. It uses back-to-back PWM converters ...
2007 46th IEEE Conference on Decision and Control, 2007
ABSTRACT In this study we propose an estimator for detecting impacts during the evolution of line... more ABSTRACT In this study we propose an estimator for detecting impacts during the evolution of linear systems subject to unilateral constraint with only the measurement of the position (possibly corrupted by noise). The detection scheme is based on fast algebraic estimator methods. This work provides an estimator, which is independent to the knowledge of the constraint position. Some simulation results are given in the presence of noise.
ABSTRACT The trajectory aspect of flatness is considered in this article from a feedforward point... more ABSTRACT The trajectory aspect of flatness is considered in this article from a feedforward point of view. This leads to the introduction of the notion of exact feedforward linearisation based on differential flatness.
Cette Note expose des conditions de rang necessaires et suffisantes pour le rejet dynamique de pe... more Cette Note expose des conditions de rang necessaires et suffisantes pour le rejet dynamique de perturbations et confirme l'importance du bouclage quasi-statique d'etat. Une unification du sujet est esquissee
Le language algebrique des filtrations fournit une transcription elegante des principales proprie... more Le language algebrique des filtrations fournit une transcription elegante des principales proprietes de l'algorithme de structure, dont on connait l'importance pour l'inversion entree-sortie. On en deduit le decouplage d'un systeme inversible a droite par un bouclage d'etat quasi-statique, qui n'exige integration d'equations differentielles
EPJ manuscript No. (will be inserted by the editor) A new control strategy for shape memory alloy... more EPJ manuscript No. (will be inserted by the editor) A new control strategy for shape memory alloys actuators ⋆
Abstract The main goal of this paper is to propose some analytical or pseudo-analytical tools fac... more Abstract The main goal of this paper is to propose some analytical or pseudo-analytical tools facilitating the study and modeling of SMA helical spring-based actuators. Particular attention is paid to R-phase SMA helical spring-based actuators (i.e., springs made in NiTi and concerned by R-phase transformation phenomena). First, simplified models (i.e., based on beam theory framework) of R-phase SMA helical springs taking into account detwinning and assisted two-way memory effect are proposed and validated. Then, these models are used to determine the thermo-mechanical behavior of a linear bias-spring actuator. An actuator is built and used to validate the proposed models.
IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016
This paper deals with a hybrid control scheme for two-phase interleaved boost converter devoted t... more This paper deals with a hybrid control scheme for two-phase interleaved boost converter devoted to renewable energy and automotive applications. The control requirements, resumed in low input current ripples, are formulated as an optimal limit cycle stabilization problem, and are solved using hybrid systems formalism. The closed-loop consists in associating each discrete mode to a clearly defined region of the state space, in such a way that the optimal limit cycle is stabilized asymptotically. Mathematical proofs are provided alongside simulations to illustrate the effectiveness and the robustness of the proposed controller, especially with the use of a fuel cell as an input source.
In this paper, a new real-time implementation of a non-linear controller multivariable for multim... more In this paper, a new real-time implementation of a non-linear controller multivariable for multimachine power systems is outlined. The experimental setup of this power system includes two dc motors and two syn-chronous machines interconnected. The power system is modeled using a new decentralized modeling approach. Some responses of the system when the load changes after a sudden fault are presented. It is also shown that the system still keeps transient stability for slightly more severe faults .
IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468)
Abstract This paper presents a variable speed constant frequency system (VSCF) for aircraft appli... more Abstract This paper presents a variable speed constant frequency system (VSCF) for aircraft applications. The system consists in a doubly fed induction generator (DFIG) connected to a stand-alone aircraft grid through its stator windings. It uses back-to-back PWM converters ...
2007 46th IEEE Conference on Decision and Control, 2007
ABSTRACT In this study we propose an estimator for detecting impacts during the evolution of line... more ABSTRACT In this study we propose an estimator for detecting impacts during the evolution of linear systems subject to unilateral constraint with only the measurement of the position (possibly corrupted by noise). The detection scheme is based on fast algebraic estimator methods. This work provides an estimator, which is independent to the knowledge of the constraint position. Some simulation results are given in the presence of noise.
ABSTRACT The trajectory aspect of flatness is considered in this article from a feedforward point... more ABSTRACT The trajectory aspect of flatness is considered in this article from a feedforward point of view. This leads to the introduction of the notion of exact feedforward linearisation based on differential flatness.
Cette Note expose des conditions de rang necessaires et suffisantes pour le rejet dynamique de pe... more Cette Note expose des conditions de rang necessaires et suffisantes pour le rejet dynamique de perturbations et confirme l'importance du bouclage quasi-statique d'etat. Une unification du sujet est esquissee
Le language algebrique des filtrations fournit une transcription elegante des principales proprie... more Le language algebrique des filtrations fournit une transcription elegante des principales proprietes de l'algorithme de structure, dont on connait l'importance pour l'inversion entree-sortie. On en deduit le decouplage d'un systeme inversible a droite par un bouclage d'etat quasi-statique, qui n'exige integration d'equations differentielles
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Papers by Emmanuel Delaleau