Patrick Marconnet
University of Reims Champagne-Ardenne
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Publication
Featured researches published by Patrick Marconnet.
Control Engineering Practice | 2004
Fabrice Bolaers; Olivier Cousinard; Patrick Marconnet; Lanto Rasolofondraibe
The aim of this article is to show the interest of spectral subtraction for the improvement of the sensitivity of scalar indicators (crest factor, kurtosis) within the application of conditional maintenance by vibratory analysis on ball bearings. The case of a bearing in good conditions of use is considered; the distribution of amplitudes in the signal is of Gaussian kind. When the bearing is damaged, the appearance of spallings comes to disturb this signal, modifying this distribution. This modification is due to the presence of periodical impulses produced each time a rolling element meets a discontinuity on its way. Nevertheless, the presence of background noise induced by random impulse excitations can have an influence on the values of these temporal indicators. The de-noising of these signals by spectral subtraction in different frequency bands allows to improve the sensitivity of these indicators and to increase the reliability of the diagnosis.
IEEE Sensors Journal | 2012
Lanto Rasolofondraibe; Bernard Pottier; Patrick Marconnet; Xavier Chiementin
This paper aims to present an experimental device, which measures the displacement of an outer ring of a roller bearing subjected to two loads: a stationary load and a rotational load. This displacement is measured with a very high degree of accuracy, by means of a capacitive probe. The probe and its associated electronics convert the displacement into a proportional voltage. The relation displacement/load is proportional since linear elasticity domain of the material is not exceeded. The empirical mode decomposition applied to the measured signal allows discriminating the stationary and rotational loads and thus gives an easy access to the value of the load. Both the numerical simulations and prototype testing confirm the relevance of the device. The applications are numerous: 1) located on the wheels of motor vehicles, potential optimization of the information received by the integrated safety devices; 2) opportunity to measure the load on lifting equipments; and 3) possibility to monitor the defects of machines through vibratory analysis.
IEEE Sensors Journal | 2011
Bernard Pottier; Lanto Rasolofondraibe; Patrick Marconnet; Danielle Nuzillard
An experimental setup has been conceived to measure the deformation of a rolling ring subjected by stress. This deformation is measured by means of a capacitive sensor. Such a sensor behaves like a displacement sensor that translates the displacement into an electrical signal. Mechanical and electrical operating points determine the sensitivity of the probe and its measurement range. Numerical simulations and tests performed on a prototype confirm the relevance of the device. Applications are numerous: i) mounted on the wheels of motorized vehicles, such sensors allow one to improve the quality information transmitted to integrated safety devices and ii) placed on devices of lift, they measure the load.
IEEE Sensors Journal | 2013
Lanto Rasolofondraibe; Bernard Pottier; Patrick Marconnet; Eric Perrin
The bearings of rotating machines are comprised of rolling elements arranged between two coaxial rings. Rolling elements transfer the external load from one raceway to the other. This loads distribution on the rolling elements is uneven and depends on the internal geometry of the bearing and on the amplitude of the external load. In order to measure the transferred charge by a rolling element, a capacitive probe is inserted into the fixed ring of the bearing. This forms with the raceway a capacitor with variable gap that depends on the transmitted load by the rolling element. A numerical model of this capacitors capacitance as a function of transmitted load by the rolling element has been established. This numerical model shows that there is a linear relation between the capacitance of the probe and the transmitted load by the rolling element. An experimental prototype has been established in order to precisely measure the probes capacitance; the numerical model facilitates the access to the loads value. By placing a capacitive probe in front of each rolling element, the load transmitted by each rolling element can be measured. Therefore, the reconstruction of the shafts external load on the rotary machines bearing can be easily done.
Mechanical Systems and Signal Processing | 2015
Sébastien Murer; Fabien Bogard; Lanto Rasolofondraibe; Bernard Pottier; Patrick Marconnet
Archive | 2009
Patrick Marconnet; Bernard Pottier; Lanto Rasolofondraibe
Mecanique & Industries | 2004
Olivier Cousinard; Philippe Rousseau; Fabrice Bolaers; Patrick Marconnet
Mechanical Systems and Signal Processing | 2016
Patrick Marconnet; Bernard Pottier; Lanto Rasolofondraibe; Jean-Paul Dron; Sanaa Kerroumi
Archive | 2008
Patrick Marconnet; Bernard Pottier; Lanto Rasolofondraibe
Archive | 2007
Patrick Marconnet; Bernard Pottier; Lanto Rasolofondraibe