Patents by Inventor Sylvain LEIRENS
Sylvain LEIRENS has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20250013713Abstract: A method for determining spatial coordinates of a source causing a dispersion effect in a domain, the dispersion effect being approximated by a system of partial differential equations, the method including computer-implemented steps, of obtaining measurements each quantifying at a point in space in the domain and at a given time a state variable modeled by the system of partial differential equations at the point and at the time, and of iteratively minimizing differences between the measurements and the computations of the system of equations to locate a position of the source. The system of equations is expressed in terms of finite differences generated by radial basis functions, the system of equations being solved in a least-squares context, using a least-squares solver, the system of equations having been subject to adjoint quadratic solution with radial basis functions chosen from polyharmonic-spline functions, inverse-multiquadric functions, or Gaussian functions.Type: ApplicationFiled: July 2, 2024Publication date: January 9, 2025Inventors: Roman LOPEZ-FERBER, Sylvain LEIRENS, Didier GEORGES
-
Publication number: 20240388208Abstract: The present invention [relates to] a regulation system (28) for a multi-active bridge converter (10) with hybrid supply, comprising: an input current port (20) comprising an H-shape switch bridge (30) having a switch (T1) controlled by a first law having a first duty cycle, at least one output voltage port (22, 24) comprising an H-shape switch bridge (38, 40), one switch (T 21, T 31) of which is controlled by a second law which is phase-shifted with respect to the first law, the regulation system (28) regulates the converter (10) to a setpoint comprising a setpoint current value for the current of the current port (20) and a setpoint voltage value for a voltage port (22, 24).Type: ApplicationFiled: May 10, 2024Publication date: November 21, 2024Applicants: Commissariat à l'énergie atomique et aux énergies alternatives, UNIVERSITE GRENOBLE ALPES, Centre national de la recherche scientifique, INSTITUT POLYTECHNIQUE DE GRENOBLEInventors: Rebecca TARRAF, David FREY, Sylvain LEIRENS, Sébastien CARCOUET, Xavier MAYNARD
-
Publication number: 20240356449Abstract: The present description concerns a method of controlling a converter comprising two H bridges coupled by a transformer. Repetitions, at a repetition frequency (fsw), of two switching sequences between a plurality of states are respectively applied to the two bridges. The method comprises first and second modes (MODE 1, MODE 2) of application of the two sequences to the two bridges. Each transition between the first mode (MODE 1) at a nominal value (fsw0) of the repetition frequency (fsw) and the second mode (MODE 2) at the nominal value (fsw0) of the repetition frequency (fsw) comprises an adaptation (fsw1, fsw2) of the repetition frequency (fsw) determined by a first duration of switching dead times.Type: ApplicationFiled: April 11, 2024Publication date: October 24, 2024Inventors: Sylvain LEIRENS, Xavier MAYNARD, Serge LOUDOT
-
Publication number: 20220358386Abstract: A method, implemented by computer, for determining a level of a space-time trending physical quantity in the presence of physical obstacles in any zone, includes in a learning phase, determination, by means of machine learning receiving as input a first set of physical obstacles and a first set of data, of a model for the physical quantity in the predefined zone; in an operation phase, determination of a second level of the physical quantity in any zone, from the model for the physical quantity receiving as input a second set of physical obstacles, distinct from the first set of physical obstacles, and a second set of data.Type: ApplicationFiled: April 8, 2022Publication date: November 10, 2022Inventors: Mouhcine MENDIL, Sylvain LEIRENS, Patrick ARMAND, Christophe DUCHENNE
-
Publication number: 20220083077Abstract: A method is provided for collaboratively detecting tangible bodies in an environment employing a plurality of distance sensors with which respective carriers are equipped, including: for each sensor, acquiring a series of measurements of distance of a closest tangible body along a line of sight; applying an inverse model of the sensor on a local occupancy grid; and constructing a consolidated local occupancy grid via Bayesian fusion of the occupancy probabilities thus determined; and, computing occupancy probabilities of the cells of a global occupancy grid via Bayesian fusion of the occupancy probabilities of corresponding cells of at least certain of said consolidated local occupancy grids. A system for implementing such a method is also provided.Type: ApplicationFiled: September 13, 2021Publication date: March 17, 2022Inventors: Alex PEREIRA DA SILVA, Sylvain LEIRENS, Suzanne LESECQ, Diego PUSCHINI PASCUAL
-
Publication number: 20210359613Abstract: The present description concerns a method of controlling a converter (100) including two H bridges (110, 120) coupled by a transformer (130), wherein: repetitions of two switching sequences between a plurality of states are respectively applied to the two bridges; the switchings of the sequences occur at times resulting from calculations based on a desired equality between values of a current in the transformer at one of said times of one of the two sequences and at one of said times of the other one of the two sequences; and for each one of said calculations, a constant frequency, common to said repetitions and identical for the two bridges, is selected prior to the calculations.Type: ApplicationFiled: May 14, 2021Publication date: November 18, 2021Inventors: Sylvain LEIRENS, Xavier MAYNARD, Serge LOUDOT
-
Publication number: 20210359609Abstract: The present description concerns a method of controlling a converter including two H bridges (110, 12) coupled by a transformer (130), wherein: two switching sequences between states are respectively applied to the two bridges; one of the states of a first one of the sequences corresponds to a given direction of application of a voltage to the transformer by the bridge having the first one of the sequences applied thereto; the first one of the sequences varies during a same halfwave of an AC voltage (V1) across one of the bridges (110), so that: during at least a first period, switchings into and out of said one of the states occur in a same state of a second one of the sequences; and during at least a second period, switchings into and out of said one of the states occur in different states of the second one of the sequences.Type: ApplicationFiled: May 14, 2021Publication date: November 18, 2021Inventors: Sylvain LEIRENS, Xavier MAYNARD, Serge LOUDOT
-
Publication number: 20210359610Abstract: The present description concerns a method of controlling a converter including two H bridges (110, 12) coupled by a transformer (130), wherein: repetitions of two switching sequences between a plurality of states are respectively applied to the two bridges; and the two sequences are generated from a same value representative of an interval between switching times of the two sequences, said same value being selected according to whether a ratio between the respective voltages across the H bridges is greater or smaller than a transformation ratio (n) of the transformer.Type: ApplicationFiled: May 14, 2021Publication date: November 18, 2021Inventors: Sylvain LEIRENS, Xavier MAYNARD, Serge LOUDOT
-
Publication number: 20190302199Abstract: A method for initializing a sensor array comprises executing a statistical test on a set consisting of first measurements measured by the sensors of the array, the statistical test being able to detect in the first measurements at least one aberrant measurement caused by a presence of an object, called a disruptor, this disruptor modifying the measured physical quantity nonuniformly, wherein if the execution of the statistical test detects at least one aberrant measurement, then the method comprises signaling the presence of the disruptor, and if the execution of the statistical test does not detect at least one aberrant measurement, then the method comprises acquiring second measurements of the physical quantity, the second measurements being measured by the sensors.Type: ApplicationFiled: March 27, 2019Publication date: October 3, 2019Applicant: Commissariat a l'energie atomique et aux energies alternativesInventor: Sylvain LEIRENS
-
Publication number: 20180031639Abstract: An estimation method for estimating a cell's state-of-charge includes obtaining a capacitance prediction for a cell based at least in part on a preceding capacitance thereof and correcting that prediction by acquiring measurements of a physical quantity that depends on a summation of currents passing through the cell. The correction is based at least in part on a difference between the measurement of the physical quantity and a prediction for that quantity.Type: ApplicationFiled: November 26, 2015Publication date: February 1, 2018Inventors: Vincent HEIRIES, Sylvain LEIRENS
-
Publication number: 20170370997Abstract: A method estimates physical quantities that are characteristic of an electric battery. The method includes acquiring values of a voltage across terminals of the electric battery and values of an intensity of a current output by the electric battery, over a determined duration. The method also includes obtaining the values of the physical quantities by solving a system of linear equations modeling an electrical behavior of the electric battery, unknowns of which are mathematically linked to the physical quantities and coefficients of which are obtained beforehand, by integrating voltage functions or intensity functions over the determined duration.Type: ApplicationFiled: December 16, 2015Publication date: December 28, 2017Applicant: RENAULT s.a.s.Inventor: Sylvain LEIRENS
-
Publication number: 20170356964Abstract: An automatic estimation procedure for estimating a battery's state-of-charge includes predicting the state-of-charge using a state model that includes a state-transition matrix. An observation model then uses an observability matrix in connection with predicting a measured value of a parameter. State noise, the covariance of which is characterized by a state-noise covariance matrix contaminates this prediction. Similarly, measurement noise, the covariance of which is characterized by a measurement covariance matrix, contaminates this prediction. The values of these covariance matrices are then adjusted during the estimation procedure.Type: ApplicationFiled: November 26, 2015Publication date: December 14, 2017Inventors: Vincent HEIRIES, Sylvain LEIRENS
-
Publication number: 20170276734Abstract: Automatically determining state-of-charge of a battery with cells includes, for each cell, scheduling refreshment times for the cell as a function of the cell's priority level, at times that correspond to refreshment times for the first cell, fully executing an estimation algorithm for the first cell, for at least a second cell of the set of cells, and at times other than those that correspond to refreshment times for the second cell, partially executing the estimation algorithm for the cell thereby obtaining an estimate of the second cell's state-of-charge, and determining a state-of-charge of the battery from states-of-charge estimated for each of the cells of the battery. The estimation algorithm estimates a cell's state-of-charge at a particular time as a function of a measured voltage and a measured current, both of which are obtained at the particular time.Type: ApplicationFiled: November 26, 2015Publication date: September 28, 2017Inventors: Vincent HEIRIES, Sylvain LEIRENS
-
Publication number: 20160377684Abstract: A method for evaluating a quantity of energy at constant power of a battery includes determining a value of a capacity parameter for the battery, constructing a table of values for a parameter of voltage across terminals of the battery as a function of a value of a current parameter, for N values of a state of charge parameter, determining a value of an internal resistance parameter for the battery, providing a table of values of an open-circuit voltage parameter, estimating a value of the state of charge parameter at an initial time, and estimating a quantity of energy parameter between a final and initial states of charge using a function whose variable is the state of charge parameter and whose parameters are said value of the capacity parameter for the battery, said value of the internal resistance parameter, and said value of the open-circuit voltage parameter.Type: ApplicationFiled: December 2, 2014Publication date: December 29, 2016Applicant: RENAULT s.a.s.Inventors: Sylvain LEIRENS, Sylvain LALLICH
-
Publication number: 20160290948Abstract: An electrochemical system includes an electrolyte that includes at least one ionic form of a chemical element A chosen from lithium and sodium. The electrolyte is in contact with a comparison electrode, a working electrode and a counterelectrode. The comparison electrode includes a first part in contact with the electrolyte and including a metal M capable of alloying with the chemical element, or a metal alloy of the metal M and of the chemical element A. The comparison electrode also includes a second part including an electrically conducting material, chemically inert with respect to the chemical element A and its ionic form and in direct contact with the first part of the comparison electrode.Type: ApplicationFiled: November 19, 2014Publication date: October 6, 2016Applicant: RENAULT s.a.s.Inventors: Sylvie GENIES, Melanie ALIAS, Sylvain LEIRENS
-
Publication number: 20160290959Abstract: A method recalibrates in situ a comparison electrode integrated into an electrochemical system. The electrochemical system includes a working electrode, a counter electrode, and an electrolyte. The method includes verifying a potential of the comparison electrode relative to the working electrode or to the counter electrode in situ, detecting whether there is a drift in the potential of the comparison electrode relative to a potential plateau for which the comparison electrode was functionalized or designed, and when the drift is detected, recalibrating the comparison electrode in situ.Type: ApplicationFiled: November 14, 2014Publication date: October 6, 2016Applicant: RENAULT S.A.SInventors: Sylvie GENIES, Melanie ALIAS, Sylvain LEIRENS, Angel Zhivkov KIRCHEV