Showing papers by "Cédric Join published in 2012"
TL;DR: A flatness-based flight trajectory planning/replanning strategy is proposed for a quadrotor unmanned aerial vehicle (UAV) to drive the system from an initial position to a final one without hitting the actuator constraints while minimizing the total time of the mission or minimize the total energy spent.
Abstract: A flatness-based flight trajectory planning/replanning strategy is proposed for a quadrotor unmanned aerial vehicle (UAV). In the nominal situation (fault-free case), the objective is to drive the system from an initial position to a final one without hitting the actuator constraints while minimizing the total time of the mission or minimizing the total energy spent. When actuator faults occur, fault-tolerant control (FTC) is combined with trajectory replanning to change the reference trajectory in function of the remaining resources in the system. The approach employs differential flatness to express the control inputs to be applied in the function of the desired trajectories and formulates the trajectory planning/replanning problem as a constrained optimization problem.
179 citations
12 Sep 2012
TL;DR: In this paper, model-free control and intelligent proportional-integral (PI) controllers are successfully applied to freeway ramp metering control and several excellent computer simulations are provided and analyzed.
Abstract: ''Model-free'' control and the related ''intelligent'' proportional-integral (PI) controllers are successfully applied to freeway ramp metering control. Implementing moreover the corresponding control strategy is straightforward. Numerical simulations on the other hand need the identification of quite complex quantities like the free flow speed and the critical density. This is achieved thanks to new estimation techniques where the differentiation of noisy signals plays a key role. Several excellent computer simulations are provided and analyzed.
19 citations
Posted Content•
TL;DR: "Model-free" control and the related "intelligent" proportional-integral (PI) controllers are successfully applied to freeway ramp metering control thanks to new estimation techniques where the differentiation of noisy signals plays a key role.
Abstract: "Model-free" control and the related "intelligent" proportional-integral (PI) controllers are successfully applied to freeway ramp metering control Implementing moreover the corresponding control strategy is straightforward Numerical simulations on the other hand need the identification of quite complex quantities like the free flow sp\^eed and the critical density This is achieved thanks to new estimation techniques where the differentiation of noisy signals plays a key r\^ole Several excellent computer simulations are provided and analyzed
14 citations
Posted Content•
TL;DR: In this paper, the existence of trends in financial time series, based on a theorem published in 1995 by P. Cartier and Y. Perrin, lead to a new understanding of option pricing and dynamic hedging.
Abstract: An elementary arbitrage principle and the existence of trends in financial time series, which is based on a theorem published in 1995 by P. Cartier and Y. Perrin, lead to a new understanding of option pricing and dynamic hedging. Intricate problems related to violent behaviors of the underlying, like the existence of jumps, become then quite straightforward by incorporating them into the trends. Several convincing computer experiments are reported.
11 citations
Posted Content•
TL;DR: In this article, the existence of trends in financial time series, based on a theorem published in 1995 by P. Cartier and Y. Perrin, lead to a new understanding of option pricing and dynamic hedging.
Abstract: An elementary arbitrage principle and the existence of trends in financial time series, which is based on a theorem published in 1995 by P. Cartier and Y. Perrin, lead to a new understanding of option pricing and dynamic hedging. Intricate problems related to violent behaviors of the underlying, like the existence of jumps, become then quite straightforward by incorporating them into the trends. Several convincing computer experiments are reported.
10 citations
04 Jul 2012
TL;DR: In this paper, model-free control is applied to a magnetic bearing, which is a quite important industrial device, and the experimental results are compared to those obtained via other control techniques.
Abstract: Model-free control is applied to a magnetic bearing, which is a quite important industrial device. The experimental results are compared to those obtained via other control techniques.
8 citations
TL;DR: An algebraic method to fault diagnosis for uncertain linear systems is proposed to realize fault diagnosis only from knowledge of input and output measurements without identifying explicitly model parameters.
6 citations
29 Aug 2012
TL;DR: In this paper, the existence of trends in financial time series, based on a theorem published in 1995 by P. Cartier and Y. Perrin, lead to a new understanding of option pricing and dynamic hedging.
Abstract: An elementary arbitrage principle and the existence of trends in financial time series, which is based on a theorem published in 1995 by P. Cartier and Y. Perrin, lead to a new understanding of option pricing and dynamic hedging. Intricate problems related to violent behaviors of the underlying, like the existence of jumps, become then quite straightforward by incorporating them into the trends. Several convincing computer experiments are reported.
1 citations
Patent•
28 Feb 2012TL;DR: In this paper, the authors proposed a method of regulating traffic on a main traffic route through the control of an actuator, which controls access of vehicles to the main route from an access route.
Abstract: The invention relates to a method of regulating traffic on a main traffic route (2) through the control of an actuator (3) controlling access of vehicles to the main route (2) from an access route (7), in which: - at least one sensor (6) measures the density of vehicles on the main route (2), - a control device (4), linked to the sensor (6) and implementing a model‑free estimation of the behaviour of the flow of the vehicles on the main route (2), calculates a first control variable - the control device (4) determines a control variable by taking account of the first control variable; - the control device (4) despatches the control variable to the actuator (3); - the actuator (3) controls access by permitting or denying the access of the vehicles on the main route (2) as a function of the control variable, so that the traffic on the main route (2) is regulated.
Patent•
31 Aug 2012TL;DR: In this paper, a procedure for regulation of a trafic on an axe is presented, in which an action-neur controls l'acces de vehicules a l'axe.
Abstract: L'invention concerne un procede de regulation d'un trafic sur un axe (2) principal de circulation par la commande d'un actionneur (3) controlant l'acces de vehicules a l'axe (2) principal depuis un axe (7) d'acces, dans lequel: - au moins un capteur (6) mesure la densite de vehicules sur l'axe (2) principal, - un dispositif (4) de commande, relie au capteur (6) et mettant en œuvre une estimation sans modele du comportement de la circulation des vehicules sur l'axe (2) principal, calcule une premiere variable de commande, - le dispositif (4) de commande determine une variable de commande en prenant en compte la premiere variable de commande; - le dispositif (4) de commande envoie la variable de commande a l'actionneur (3); - l'actionneur (3) controle l'acces en autorisant ou non l'acces des vehicules sur l'axe (2) principal en fonction de la variable de commande, de sorte que le trafic sur l'axe (2) principal soit regule.