Fluides et systèmes énergétiques (FISE)http://hdl.handle.net/10985/1742018-06-21T04:54:39Z2018-06-21T04:54:39ZVector Control of Piezoelectric Transducers and Ultrasonic ActuatorsGHENNA, SofianeGIRAUD, FrédéricGIRAUD-AUDINE, ChristopheAMBERG, Michelhttp://hdl.handle.net/10985/131952018-05-24T00:58:18Z2018-01-01T00:00:00ZGHENNA, Sofiane; GIRAUD, Frédéric; GIRAUD-AUDINE, Christophe; AMBERG, Michel
IEEE Transaction on Industrial Electronics
This paper presents the implementation of a novel vibration amplitude control and resonant frequency tracking for piezoelectric transducers (PTs) and ultrasonic motors (USMs). It is based on a generalization of the vector control method to the PT and the USM, which is explained in the first part. We show that two independent controllers with a similar structure are required: one tracks the resonant frequency and the second controls the amplitude. We
then present the implementation into a low-cost digital signal processing controller with a sampling period of 200 µs. Experimental results on a Langevin transducer achieved a time response of 20 ms approximately, and the generality of the method is further demonstrated on a 2-D tactile stimulator at the end of this paper.
2018-01-01T00:00:00ZGHENNA, SofianeGIRAUD, FrédéricGIRAUD-AUDINE, ChristopheAMBERG, MichelThis paper presents the implementation of a novel vibration amplitude control and resonant frequency tracking for piezoelectric transducers (PTs) and ultrasonic motors (USMs). It is based on a generalization of the vector control method to the PT and the USM, which is explained in the first part. We show that two independent controllers with a similar structure are required: one tracks the resonant frequency and the second controls the amplitude. We
then present the implementation into a low-cost digital signal processing controller with a sampling period of 200 µs. Experimental results on a Langevin transducer achieved a time response of 20 ms approximately, and the generality of the method is further demonstrated on a 2-D tactile stimulator at the end of this paper.Differentiated Haptic Stimulation by Modal Synthesis of Vibration FieldENFERAD, EhsanGIRAUD-AUDINE, ChristopheAMBERG, MichelLEMAIRE-SEMAIL, BettyGIRAUD, Frederichttp://hdl.handle.net/10985/130742018-05-04T00:52:45Z2018-01-01T00:00:00ZENFERAD, Ehsan; GIRAUD-AUDINE, Christophe; AMBERG, Michel; LEMAIRE-SEMAIL, Betty; GIRAUD, Frederic
To date, Several focusing techniques have been proposed to realize localized stimulation on haptic interfaces: phased arrays of actuators with delayed excitation, or time reversal techniques which require a preliminary learning phase. Additionally, these techniques are sensitive to parameters variation and disturbances. Modal decomposition allows to realize arbitrary vibration fields congruent with the boundary conditions and in this paper, Modal decomposition is proposed to realize a desired vibration velocity field in order to have differentiated stimuli. The experimental results validate the ability of the method to approximate satisfactorily a desired reference form. The psychophysical evaluations show that users can differentiate and localize the stimulation while exploring a surface with two fingers.
2018-01-01T00:00:00ZENFERAD, EhsanGIRAUD-AUDINE, ChristopheAMBERG, MichelLEMAIRE-SEMAIL, BettyGIRAUD, FredericTo date, Several focusing techniques have been proposed to realize localized stimulation on haptic interfaces: phased arrays of actuators with delayed excitation, or time reversal techniques which require a preliminary learning phase. Additionally, these techniques are sensitive to parameters variation and disturbances. Modal decomposition allows to realize arbitrary vibration fields congruent with the boundary conditions and in this paper, Modal decomposition is proposed to realize a desired vibration velocity field in order to have differentiated stimuli. The experimental results validate the ability of the method to approximate satisfactorily a desired reference form. The psychophysical evaluations show that users can differentiate and localize the stimulation while exploring a surface with two fingers.Successive bifurcations in a fully three-dimensional open cavity flowPICELLA, FLOISEAU, J.LUSSEYRAN, fROBINET, jCHERUBINI, sPASTUR, lhttp://hdl.handle.net/10985/130142018-06-05T11:21:26Z2018-01-01T00:00:00ZPICELLA, F; LOISEAU, J.; LUSSEYRAN, f; ROBINET, j; CHERUBINI, s; PASTUR, l
Journal of Fluid Mechanics
The transition to unsteadiness of a three-dimensional open cavity flow is investigated
using the joint application of direct numerical simulations and fully three-dimensional
linear stability analyses, providing a clear understanding of the first two bifurcations
occurring in the flow. The first bifurcation is characterized by the emergence of
Taylor–Görtler-like vortices resulting from a centrifugal instability of the primary
vortex core. Further increasing the Reynolds number eventually triggers self-sustained
periodic oscillations of the flow in the vicinity of the spanwise end walls of the
cavity. This secondary instability causes the emergence of a new set of Taylor–Görtler
vortices experiencing a spanwise drift directed toward the spanwise end walls of the
cavity. While a two-dimensional stability analysis would fail to capture this secondary
instability due to the neglect of the lateral walls, it is the first time to our knowledge
that this drifting of the vortices can be entirely characterized by a three-dimensional
linear stability analysis of the flow. Good agreements with experimental observations
and measurements strongly support our claim that the initial stages of the transition
to turbulence of three-dimensional open cavity flows are solely governed by modal
instabilities.
2018-01-01T00:00:00ZPICELLA, FLOISEAU, J.LUSSEYRAN, fROBINET, jCHERUBINI, sPASTUR, lThe transition to unsteadiness of a three-dimensional open cavity flow is investigated
using the joint application of direct numerical simulations and fully three-dimensional
linear stability analyses, providing a clear understanding of the first two bifurcations
occurring in the flow. The first bifurcation is characterized by the emergence of
Taylor–Görtler-like vortices resulting from a centrifugal instability of the primary
vortex core. Further increasing the Reynolds number eventually triggers self-sustained
periodic oscillations of the flow in the vicinity of the spanwise end walls of the
cavity. This secondary instability causes the emergence of a new set of Taylor–Görtler
vortices experiencing a spanwise drift directed toward the spanwise end walls of the
cavity. While a two-dimensional stability analysis would fail to capture this secondary
instability due to the neglect of the lateral walls, it is the first time to our knowledge
that this drifting of the vortices can be entirely characterized by a three-dimensional
linear stability analysis of the flow. Good agreements with experimental observations
and measurements strongly support our claim that the initial stages of the transition
to turbulence of three-dimensional open cavity flows are solely governed by modal
instabilities.Five-phase SPM machine with electronic pole changing effect for marine propulsionZAHR, HusseinSCUILLER, FranckSEMAIL, Erichttp://hdl.handle.net/10985/129992018-04-18T00:51:42Z2016-01-01T00:00:00ZZAHR, Hussein; SCUILLER, Franck; SEMAIL, Eric
In this paper, the possibility of designing a fivephase Surface-mounted Permanent Magnet (SPM) machine with 20 slots and 8 poles for a low power marine propulsion system
is examined. Due to its particular winding and surface magnet design, the machine inherently offers an electronic pole changing effect from 3×4 pole pairs at low speed to 4 pole pairs at high speed. At high speed, in the constant power range, according to Finite Element Analysis, the Maximum Torque Per Ampere strategy appears not to be the right solution to minimize the whole machine losses (copper, iron and magnets). In particular,
a strategy that favors the 4-pole rotating field at high speed allows to mitigate the magnet losses, thus limiting the risk of magnet overheating.
2016-01-01T00:00:00ZZAHR, HusseinSCUILLER, FranckSEMAIL, EricIn this paper, the possibility of designing a fivephase Surface-mounted Permanent Magnet (SPM) machine with 20 slots and 8 poles for a low power marine propulsion system
is examined. Due to its particular winding and surface magnet design, the machine inherently offers an electronic pole changing effect from 3×4 pole pairs at low speed to 4 pole pairs at high speed. At high speed, in the constant power range, according to Finite Element Analysis, the Maximum Torque Per Ampere strategy appears not to be the right solution to minimize the whole machine losses (copper, iron and magnets). In particular,
a strategy that favors the 4-pole rotating field at high speed allows to mitigate the magnet losses, thus limiting the risk of magnet overheating.Integrated Traction/Charge/Air Compression Supply using 3-Phase Split-windings Motor for Electric VehicleLHOMME, WalterDELARUE, PhilippeDOS SANTOS MORAES, Tiago JoseNGUYEN, Ngac KySEMAIL, EricCHEN, KeyuSILVESTRE, Benedictehttp://hdl.handle.net/10985/129982018-04-18T00:51:40Z2018-01-01T00:00:00ZLHOMME, Walter; DELARUE, Philippe; DOS SANTOS MORAES, Tiago Jose; NGUYEN, Ngac Ky; SEMAIL, Eric; CHEN, Keyu; SILVESTRE, Benedicte
Transactions on Power Electronics
High cost, no-ideal driving range and charge time limit electric vehicle market share. Facing these challenges, an in-tegrated motor drive/battery charger system has been proposed by Valeo. A further advancement, based on this system, is present in this paper; for the first time, the integration of traction, charging and air-compressor supply modes is proposed and tested by real-time experimentation. This integrated system is expected to in-crease the vehicle component compactness and power, therefore potentially reduce the cost and battery charging time. An overall and unique control scheme is detailed to achieve the three main operating modes: traction, charging and air-compressor supply modes. The real-time experimentation results show the system fea-sibility.
2018-01-01T00:00:00ZLHOMME, WalterDELARUE, PhilippeDOS SANTOS MORAES, Tiago JoseNGUYEN, Ngac KySEMAIL, EricCHEN, KeyuSILVESTRE, BenedicteHigh cost, no-ideal driving range and charge time limit electric vehicle market share. Facing these challenges, an in-tegrated motor drive/battery charger system has been proposed by Valeo. A further advancement, based on this system, is present in this paper; for the first time, the integration of traction, charging and air-compressor supply modes is proposed and tested by real-time experimentation. This integrated system is expected to in-crease the vehicle component compactness and power, therefore potentially reduce the cost and battery charging time. An overall and unique control scheme is detailed to achieve the three main operating modes: traction, charging and air-compressor supply modes. The real-time experimentation results show the system fea-sibility.Data-Driven Model Order Reduction for Magnetostatic Problem Coupled with Circuit EquationsPIERQUIN, AntoineHENNERON, ThomasCLENET, Stephanehttp://hdl.handle.net/10985/129972018-04-18T00:51:38Z2018-01-01T00:00:00ZPIERQUIN, Antoine; HENNERON, Thomas; CLENET, Stephane
Transaction on Magnetics
Among the model order reduction techniques, the Proper Orthogonal Decomposition (POD) has shown its efficiency to solve magnetostatic and magneto-quasistatic problems in the time domain. However, the POD is intrusive in the sense that it requires the extraction of the matrix system of the full model to build the reduced model. To avoid this extraction, nonintrusive approaches like the Data Driven (DD) methods enable to approximate the reduced model without the access to the full matrix system. In this article, the DD-POD method is applied to build a low dimensional system to solve a magnetostatic problem coupled with electric circuit equations.
2018-01-01T00:00:00ZPIERQUIN, AntoineHENNERON, ThomasCLENET, StephaneAmong the model order reduction techniques, the Proper Orthogonal Decomposition (POD) has shown its efficiency to solve magnetostatic and magneto-quasistatic problems in the time domain. However, the POD is intrusive in the sense that it requires the extraction of the matrix system of the full model to build the reduced model. To avoid this extraction, nonintrusive approaches like the Data Driven (DD) methods enable to approximate the reduced model without the access to the full matrix system. In this article, the DD-POD method is applied to build a low dimensional system to solve a magnetostatic problem coupled with electric circuit equations.Iterative Kriging-based Methods for Expensive Black-Box ModelsDENG, SiyangEL BECHARI, RedaBRISSET, StéphaneCLENET, Stéphanehttp://hdl.handle.net/10985/129962018-04-18T00:51:38Z2018-01-01T00:00:00ZDENG, Siyang; EL BECHARI, Reda; BRISSET, Stéphane; CLENET, Stéphane
Transactions on magnetics
Reliability-Based Design Optimization (RBDO) in electromagnetic field problems requires the calculation of probability of failure leading to a huge computational cost in the case of expensive models. Three different RBDO approaches using kriging surrogate model are proposed to overcome this difficulty by introducing an approximation of the objective function and constraints. These methods use different infill sampling criteria (ISC) to add samples in the process of optimization or/and in the reliability analysis. Several enrichment criteria and strategies are compared in terms of number of evaluations and accuracy of the solution.
2018-01-01T00:00:00ZDENG, SiyangEL BECHARI, RedaBRISSET, StéphaneCLENET, StéphaneReliability-Based Design Optimization (RBDO) in electromagnetic field problems requires the calculation of probability of failure leading to a huge computational cost in the case of expensive models. Three different RBDO approaches using kriging surrogate model are proposed to overcome this difficulty by introducing an approximation of the objective function and constraints. These methods use different infill sampling criteria (ISC) to add samples in the process of optimization or/and in the reliability analysis. Several enrichment criteria and strategies are compared in terms of number of evaluations and accuracy of the solution.Influence of the Manufacturing Process of a Claw-Pole Alternator on Its Stator Shape and Acoustic NoiseTAN-KIM, AntoineHAGEN, NicolasLANFRANCHI, VincentCLENET, StephaneCOOREVITS, ThierryMIPO, Jean-ClaudeLEGRANGER, JeromePALLESCHI, Frédérichttp://hdl.handle.net/10985/129952018-04-18T00:51:26Z2017-01-01T00:00:00ZTAN-KIM, Antoine; HAGEN, Nicolas; LANFRANCHI, Vincent; CLENET, Stephane; COOREVITS, Thierry; MIPO, Jean-Claude; LEGRANGER, Jerome; PALLESCHI, Frédéric
Transactions on Industry Applications
This paper shows the influence of the manufacturing process of a claw-pole alternator on its acoustic noise. First, the stator welds and the assembly of the stator in the brackets are linked to deformations of the inner diameter of the stator. Then, the influences of these deformations on the magnetic forces and the subsequent acoustic noise are investigated. Results show that the deformations caused by the manufacturing process significantly increase the sound power level of particular orders.
2017-01-01T00:00:00ZTAN-KIM, AntoineHAGEN, NicolasLANFRANCHI, VincentCLENET, StephaneCOOREVITS, ThierryMIPO, Jean-ClaudeLEGRANGER, JeromePALLESCHI, FrédéricThis paper shows the influence of the manufacturing process of a claw-pole alternator on its acoustic noise. First, the stator welds and the assembly of the stator in the brackets are linked to deformations of the inner diameter of the stator. Then, the influences of these deformations on the magnetic forces and the subsequent acoustic noise are investigated. Results show that the deformations caused by the manufacturing process significantly increase the sound power level of particular orders.Five-Phase Bi-Harmonic PMSM Control under Voltage and Currents LimitsZAHR, HusseinTRABELSI, MohamedSEMAIL, EricNGUYEN, Ngac Kyhttp://hdl.handle.net/10985/129942018-04-18T00:51:39Z2017-01-01T00:00:00ZZAHR, Hussein; TRABELSI, Mohamed; SEMAIL, Eric; NGUYEN, Ngac Ky
For a particular five-phase synchronous machine, this paper investigates the sensitivity of a vectorial control strategy on the required peak phase voltage whose value is fundamental for the choice of the DC bus voltage. The specificity of the machine is that the first and third harmonic components of the back electromotive force (back-emf) have the same amplitude. As a consequence, the torque can be produced by one of them or both with suitable currents. This degree of freedom is interesting for optimizing the efficiency and generating high transient torque. However, using two harmonics having the same amplitude leads to a necessity to analyze the constraints on the required phase machine voltage. Considering a Maximum Torque Per Ampere (MTPA) strategy, the paper examines the impact of some parameters such as the phase shift between currents and back-emfs or the ratio between the third and the first harmonic of current on the torque and maximum voltage value. Experimental tests with a limited DC bus voltage have been carried out and compared to the results obtained by a Finite Element Analysis.
2017-01-01T00:00:00ZZAHR, HusseinTRABELSI, MohamedSEMAIL, EricNGUYEN, Ngac KyFor a particular five-phase synchronous machine, this paper investigates the sensitivity of a vectorial control strategy on the required peak phase voltage whose value is fundamental for the choice of the DC bus voltage. The specificity of the machine is that the first and third harmonic components of the back electromotive force (back-emf) have the same amplitude. As a consequence, the torque can be produced by one of them or both with suitable currents. This degree of freedom is interesting for optimizing the efficiency and generating high transient torque. However, using two harmonics having the same amplitude leads to a necessity to analyze the constraints on the required phase machine voltage. Considering a Maximum Torque Per Ampere (MTPA) strategy, the paper examines the impact of some parameters such as the phase shift between currents and back-emfs or the ratio between the third and the first harmonic of current on the torque and maximum voltage value. Experimental tests with a limited DC bus voltage have been carried out and compared to the results obtained by a Finite Element Analysis.Experimental investigation on the effect of load distribution on the performances of a counter-rotating axial-flow fanRAVELET, florentBAKIR, faridSARRAF, christopheWANG, juanhttp://hdl.handle.net/10985/129742018-04-14T00:47:58Z2018-01-01T00:00:00ZRAVELET, florent; BAKIR, farid; SARRAF, christophe; WANG, juan
experimental thermal and fluid science
In the design procedure of a counter-rotating axial-flow stage, parameters such as the angular velocity ratio and the repartition of the work performed by each rotors are to be chosen. In the present Article, three counter-rotating stages are designed to meet the same working point. These stages have different repartitions of load between the front and rear rotor, different angular velocity ratios or mean stagger angles of the blades of the front rotors. The stage global characteristics and the unsteady features of the flow between the counter-rotating rotors are measured and compared. The three systems all have satisfying overall performances at the design point. Strong differences are observed in the flow field at partial flow rates, the rear rotor reducing the hub recirculation. The behaviour at partial flow rates is thus triggered by the rear rotor characteristics. The best compromise is obtained with a repartition of the loading of 60% for the front rotor and 40% for the rear rotor, with almost equal angular velocities
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2018-01-01T00:00:00ZRAVELET, florentBAKIR, faridSARRAF, christopheWANG, juanIn the design procedure of a counter-rotating axial-flow stage, parameters such as the angular velocity ratio and the repartition of the work performed by each rotors are to be chosen. In the present Article, three counter-rotating stages are designed to meet the same working point. These stages have different repartitions of load between the front and rear rotor, different angular velocity ratios or mean stagger angles of the blades of the front rotors. The stage global characteristics and the unsteady features of the flow between the counter-rotating rotors are measured and compared. The three systems all have satisfying overall performances at the design point. Strong differences are observed in the flow field at partial flow rates, the rear rotor reducing the hub recirculation. The behaviour at partial flow rates is thus triggered by the rear rotor characteristics. The best compromise is obtained with a repartition of the loading of 60% for the front rotor and 40% for the rear rotor, with almost equal angular velocities