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The braking system is the most critical system of the vehicle. Maintenance and proper operation are vital for us, for this reason, and since the 70s, a growing number of scientists have been interested in the braking systems. Currently the braking system has become a mechatronic system. It consists of a hydraulic part, a mechanical part and an electronic part. Indeed, while the car is rolling, the...
Stratospheric ozone profiles from MLS and tropospheric ozone columns from IASI have been assimilated into the MOCAGE model during the month of July 2009, using a variational (3D‐FGAT) technique. This study compares the separate and combined analysis of IASI tropospheric columns and MLS stratospheric profiles, in order to investigate possible synergistic effects. The contributions on the ozone distribution...
An optimal design approach is developed for permanent magnet motors. First, parameterized design model is built. Second the significant shape parameters are identified using the Fisher test of ANOVA. Finally, an optimal design loop, delivering as final output optimized geometries of Permanent Magnet motors, is implemented.
For a better force computation of a three phase permanent magnet linear synchronous actuator, the self inductances of this actuator are modeled. A two dimensional axi-symmetric finite element model is built for the actuator taking into account saturation effects. The inductance values are computed for different current densities, over one pole pitch, using the flux linkage approach. Multimodal interpolation...
This paper presents performance comparison of three inverter control techniques. These techniques are respectively hysteresis control, PWM control and direct voltage control (DVC). They are applied for a PM Linear Tubular Synchronous Actuator (PMTLSA) drive fed, using a three phase voltage source inverter (VSI). This VSI is working with constant switching time intervals as in the standard torque control...
In order to minimize the oscillations and the overflow of the dynamic response of linear step actuators over two successive step displacements, a control approach, based on commutation instant optimization, is developed and applied to a linear step actuator. The obtained results are, then, validated using an experimental test bench.
In high-performance servo applications, a rapid and accurate torque control is required, preferable without the use of the motion-state sensor. The use of permanent magnet synchronous motors combined with direct torque control techniques provides many opportunities to achieve this goal. The purpose of this paper is to improve the modeling and the control of a typical tubular permanent-magnet linear...
Throughout this paper, we are going to use two different methods for the optimization of a shape coefficient Sc for a linear tubular step actuator range, allowing to maximize the trust force by Joule losses ratio. The first method is based on analytical computation and the second one is based on reluctance network modelling. These two methods converge to the same result which is validated by finite...
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