Bearing and gear fault detection using Machine Learning

Maintenance services are beginning to use conditioned-based maintenance with vibration sensors. New methods in signal post-processing are being coupled with Machine Learning (ML) algorithms.

The method proposed by VibraTec is to add a qualitative analysis in case of fault detection (bearing or gear faults, etc.)

This new step helps maintenance services to focus more efficiently on the faulty part of the system, inducing more rapid repair. This involves less downtime, leading to significant gains in productivity.

This research work was developed for maintenance services, in order to increase the efficiency, maintenance scheduling, and organization.

The work, focusing on the railway sector, was developed in the scope of the Run2Rail project (Shift2Rail). However, it can be applied to any industrial sector (aeronautics, automotive, etc.).


Annual Meeting : French Mechanics Association Rotating Equipment Committee

VibraTec is working on a new approach to early gear fault detection. This vibration monitoring method detects, locates and characterizes the evolution & criticality of bearing and tooth faults. Large quantities of data are collected; classification is performed with AI algorithms.

Renaud BERTONI presented this method on June 4th at the annual French Mechanics Association Rotating Equipment Committee meeting at Honeywell-Garrett France’s headquarters in the Vosges. This committee, composed of academia and industrial partners, meets once a year to discuss scientific & technological issues pertaining to rotating equipment (digital and experimental aspects). Meetings are also the occasion to visit industrial installa

VibraTec is a longtime member and acting secretary, sharing its technical developments relating to rotating equipment.


Railway monitoring: Autonomous Embedded Vibroacoustic

The development of communication tools and electronic components, the increase in computation capabilities and the enhancement of MEMS sensors make it possible to design an efficient Proof Of Concept (POC) for corrugation analysis. This embedded system provides timely information about the state of the rail infrastructure.

This prototype solution dedicated to railway maintenance management was developed in order to prevent rail corrugation effects on the track and on rolling stock.

The paper focuses on the rail corrugation monitoring system developed in the scope of the MAVICO project.


XIX International Wheelset Congress: “IWC” in Venice, 16th -20th June, 2019

Vibratec presents new methods to estimate railway rolling noise.

Rolling noise can now be estimated by combining laboratory measurements, e.g. sound pressure, with STARDAMP calculations. The developed procedure allows to account for real operating conditions (speed, load, track conditions) when it comes to design new wheels and railway dampers.

The new methods were developed in a cooperation with our client BONATRANS, a leader in wheelset and damper design.

Our railway acoustics expert Martin Rissmann will present our new methods at the IWC 2019 in Venice. He will be happy to meet you there.


International Congress: “SIA POWER TRAIN & ELECTRONICS” in Port Marly (Paris), 11 -13th June, 2019

Multi-objective optimization of electrical machines including NVH, energy and thermal considerations

Vibratec will present a paper at the international congress “SIA POWER TRAIN & ELECTRONICS3 at Port Marly (Paris).

This paper describes a new method to optimize the electromagnetic design of electric motors in order to minimize the radiated noise under mechanical, efficiency and thermal constraints

This noise is closely related to the electromagnetic design of the machine. Taking it into account right from the design stage keeps it under control. The advantages are many: high quality products, time and money savings (no later design changes, no heavy and expensive countermeasures). This methodology relies on a multi physical model involving all the electro mechanical parameters of the motor. It is included in a multi-objective, multi-constraint optimization process.

This optimization process has been implemented for several motor manufacturers in the field of automotive and railway industry.

Learn more about motor optimization: sylvestre.lecuru@vibratec.fr


European Test and Telemetry Conference (ETTC 2019)

A new vision for the MRO market

VibraTec will attend the next ETTC 2019 conference, on June 11-13th 2019 in Toulouse, France.

Renaud Bertoni and Lionel Duvermy will introduce a new approach for gear and bearing fault detection.

VibraTec develops a prognostic process to monitor the mechanical behavior of the driving chain.

Applied on a dedicated Health Monitoring Systems (HMS) test bench, a review of the methodology is proposed, from instrumentation to the classification using Machine Learning process.


25th AIAA/CEAS Aeroacoustics Conference, 20-23 May 2019, Delft, Netherlands

Validation with experimental data of a heterogeneous turbulent wall pressure fluctuation model in a FEM structural context


Romain Leneveu will present our last development to address noise and vibration transmission due to the wall pressure fluctuations induced by turbulent boundary layers.

In the frame of the CLEANSKY 2 CANOBLE project, VibraTec and their partners Ecole Centrale de Lyon and GIE S2A have developed and validated a numerical strategy with experimental data to take into account non-uniform turbulent boundary layer profiles into a vibroacoustic FEM response when the structure is loaded by turbulent wall pressure fluctuations. Comparison with experimental data will be presented and discussed.

Session IN/SA-03, on May 23rd 2019 at 2PM


Vehicle Symposium EVS32 « A world of E MOTION » in Lyon (France), May 19 – 22nd, 2019

Acoustic optimization of electric powertrain

Vibratec will be present on May 20th at EVS32 Lyon.

Henri Saucy will present our latest development in optimization of electric powertrains: methods, tools, and application to automotive cases.

The powerful algorithms used by Vibratec and its customers to design energy efficient e-motors allowed significant acoustic gains, removing tonal peaks and lowering overall sound level.

This new offer expands Vibratec already wide range of services to support the EV and HEV industry: acoustic troubleshooting, simulation, and NVH integration of the e-motor in the vehicle.

Most major actors of the electric vehicle world already trust Vibratec: car manufacturers, motor and accessories suppliers.

electric powertrain optimization

There are no passengers on spaceship earth.

The VibraTec Group guides its clients toward eco-friendly solutions whenever possible, and also encourages the use of public transportation, cycling and carpooling among its employees.

In this context, AirFrance’s CO2Zero program supporting CO2OL provided us a good way to compensate our air travel carbon footprint by helping to reforest the Panama Canal Zone. To date, over 7.5 million trees have been planted, 15 endangered species have a new habitat and 150 jobs have been created.

green carbon footprint

Improve your skills in our springtime training sessions

The perfect occasion to upskill colleagues:

  • Rotating Equipment Vibration Diagnosis” from May 14th to 16th: to be able to identify common rotating machine defects and understand diagnosis tools & methods.
    • Principles of vibration
    • Principles of data acquisition
    • Principles of signal processing
    • Vibration standards
    • Common defects
    • Detection tools
    • Case studies
  • Experimental Modal Analysis (EMA)” on May 21st and 22nd: to understand and be able to use this structural characterization technique.
    • Basic theory
    • Mode identification methods
    • Model tuning
    • Establishing a measurement procedure
    • Case studies on a mock-up
  • Specialized Testing, Iso-damage Approach” on May 23rd: to be able to write a specific Scope of Work for product & equipment suppliers.
    • Review of structural fatigue resistance
    • Standard hypotheses
    • Principles of signal processing
    • Personalizing for modal structures
    • Taking variability into account
    • Case studies
  • Rotor Dynamics” on May 28th, as a complement to the Rotating Equipment course or on a stand-alone basis: in order to hold intelligent, pertinent discussions with suppliers – and know the ‘right’ questions to ask.
    • Principles of vibration
    • Theoretical basis of rotor dynamics
    • Rotor modelling
    • Rotor dynamic stiffness mapping
    • Critical speed calculation
    • Unbalance response calculation
    • Stability analysis calculation
    • Case studies

Consult our training catalog.

VibraTec is a training center recognized by the French administration and French professional training funding centers.

Technical training

Acoustic Optimization of E-Machines

Minimizing e-machine noise levels without impacting energy efficiency is now possible thanks to VibraTec’s new acoustic optimization method.

This innovative algorithm generates modifications of rotor and stator geometry, drastically reducing unwanted vibration and noise for a given set of operating conditions.

Working in close cooperation with its customer on the design of an automotive traction motor, and focusing on a specific tonal noise in the center of the machine speed range, VibraTec achieved a 14 dB reduction in sound power level on an order tracking.

VibraTec provides a vast range of services in the acoustic design and optimization of electric machines: support in pre-design to choose the quietest architecture from the beginning, vibro-acoustic simulation, integration in complete vehicle FE-models, experimental characterization of noise sources and high speed test benches.

electric car motor noise reduction

VIBRATEC is now proposing a maintenance aid service for railway networks

VIBRATEC has been involved in track and rolling stock dynamic behavior analysis for over 30 years, using both measurement techniques in operation and interaction models between rail and rolling stock.

Using its expertise, VIBRATEC is now proposing a maintenance aid service. This service is based on two approach, experimental and numerical:

  • a smart autonomous monitoring system to detect rail defects (squat, corrugation, squealing,…),
  • a digital (virtual) approach to evaluate the remaining life of your rolling stock and rail.

Data are not only used for condition monitoring but also to prompt maintenance operations.  VIBRATEC’s asset management aims to shift from a reactive maintenance mode to a proactive one; to ensure the durability of your asset and to optimize the exploitation to extend the service life of the rail and the rolling stock.

See the video

Contact: Anne COULON – tel – anne.coulon@vibratec.fr


2 days dedicated to Signal Processing

The perfect occasion to upskill colleagues in this field during our “Signal Processing” training course on April 2nd and 3rd. They will learn how to choose the appropriate signal processing method & selection criteria, and then analyze results.

  • Signal classification,
  • Time analysis,
  • Spectral analysis,
  • System analysis.

Consult our training catalog.

VibraTec is a training center recognized by the French administration and French professional training funding centers.

signal processing training

VibraTec training – sessions in March 2018

VibraTec will hold 4 open course sessions in March 2018. All are based on case studies.

  • From the 12th to the 14th of March: “Noise from Electromagnetic Excitation”: discover the basic electric motor operation & power supply, the efforts & magnetic phenomena implicated, phenomena capable of producing electromagnetic noise in electric machines. Learn how to set up an experimental & numeric method to understand the vibratory behavior of electric machines.
  • The 19th of March will be the occasion to learn about standards and requirements regarding “Human Vibration Exposure” to negotiate with suppliers more effectively, improve worker / colleague protection and fully comply with applicable legislation.
  • 20th & 21st of March: “Experimental Vibration Analysis” – explore industrial vibration issues, measurement & analysis methods and mitigation solutions.
  • 26th & 27th of March: first official session for our new “Railway Maintenance & Dynamics” course: optimize your maintenance programs with an increased understanding of the physics of wheel-rail contact, the faults they create and how they evolve over time.

Consult our training catalog.

VibraTec has French training accreditation and is referenced with DataDock. Sessions for French company employees can be funded by accredited French fund-collecting agencies (OPCA).

technical training

ShareLab – invite yourself to VibraTec !

Do you wonder about the vibration or acoustic behavior of your products and think that measurements would clarify things ?

VibraTec welcomes you to our lab and gives you free access to our sensors, data acquisition systems and facilities.

One day a month, you can set up shop at one of our test benches (with or without gantry crane) or in our semi-anechoic chamber and use our large stock of equipment (microphones, accelerometers, acoustic arrays, multi-channel analyzers, recorders, etc.) An in-house expert will be on hand to get you started.

Take advantage of this opportunity: schedule the date, then just come and install your equipment, do your testing and leave with results that you can analyze back in the office.

Sign up now: our dates this fall:

  • February 1st
  • March 1st
  • March 29th

sharing measurement equipment

Why wait to schedule your 2019 training programs ?

NEW this year !  Courses dedicated to Finite Element Model Updating, Railway Maintenance & Dynamics and also Noise from Gear Systems. The first sessions are at the end of January.

The specific web pages give the schedule for our Open programs held in France. We also organize all of our courses on demand on-site for clients worldwide who wish to train groups of employees together, focusing on their specific field / job.

Referenced as an official training center and registered on the DataDock platform to enable public funding for our course attendees (from French companies), VibraTec offers courses centered around industrial vibration, acoustics, signal processing and related fields targeting engineers and technicians.

Feel free to contact our training department for more information.


qualified professional training

Jessica Neufond will represent VibraTec in Le Mans on 15-16 Nov at the Young Researchers’ Days in vibrations, Acoustics and Noise

She will present results of a study of the vibroacoustic behavior of planetary gears, from the determination of internal excitation to the vibration state of the housing.

The method developed reduces computation time (under an hour for a complete simulation) while using the real gearbox geometry.

This study focuses on planetary gear whining noise by determining internal excitation by simultaneously taking into account all meshings to include coupled interactions. The dynamic response is then calculated at any point in the housing via the resolution of the coupled equations of motion in the spectral domain and via an iterative process. Finally, experimental testing was performed to compare calculation and measurement results.

This is the subject of Jessica’s CIFRE thesis, in partnership with the Laboratory of Tribology and Systems Dynamics (LTDS, Ecole Centrale de Lyon) resulting from the common Ladage laboratory. VibraTec‘s expertise on the topic of gears is thus extended to the case of planetary gears.

Finite Element Model

Customized asset management and monitoring solutions: learn about at Achema, from 11th to 15th of June 2018

Surveillance or maintenance: ignorance is bliss?

Do not stay in the dark! Have better nights: discover our Smart Solutions to plan your maintenance and ensure the quality of your activity.

To find out more, come see us at the ACHEMA trade show in Frankfurt, 11th to 15th of June 2018, hall 11.0 booth A58. We will answer your questions, especially in the production, process and energy industries.

If you want free invitation, contact us.


VibraTec at the ENOVA Toulouse event on the 30th and 31st of May 2018

Come and meet us on booth B10 and discuss your needs for optimizing the design of your equipment in noise, vibration, and reliability. We will also present innovative instrumentation solutions, embedded or not, for the diagnosis and control of the life cycle of your products. Among the presented solutions: the SoundCam solution developed by our subsidiary MicrodB to perform a rapid acoustic diagnosis of a complex mechanical system; and an original solution for diagnosing the components of a transmission chain.


Ignorance is bliss ?

Why would you monitor your production line, when it’s so much simpler to just wait for it to break down and bring your entire activity to a full stop?

If “Ignorance is bliss” isn’t your motto, if you sleep better with your maintenance well-scheduled and a rigorous quality control, you may be interested by our Smart Solutions.

Combining multi-physics sensing with state of the art modelling and Digital Twin technology, VibraTec offers customized asset management and monitoring solutions independent of any specific hardware or software.

To learn more, come and see us at ACHEMA in Frankfurt, Germany, from 11th to 15th of June 2018, hall 11.0 booth A58, where we can introduce you to our experience with the manufacturing, process, and energy industry.


Comprehensive innovative monitoring solutions to be presented at ACHEMA

Looking for a comprehensive, innovative solution to monitor your production process or characterize your products and raw materials?

VibraTec will participate in the ACHEMA trade show in Frankfurt from June 11th to 15th. We will present our SmartSolutions applied to a variety of industries and processes: energy, transportation, pumps, medical devices, test benches, safety and quality control.

Come and visit us to see how we can help you boost productivity and manage your assets the smart way!

Henri, Nicolas, and Katja will be waiting for you at booth A58, Hall 11.0.


Innovate with VibraTec ! We will be at the Smart Industries event during the Global Industrie fair in Paris from 27 to 30 March

VibraTec was chosen to represent the Auvergne-Rhone-Alpes region as an SME with innovative products & services (predictive maintenance, innovative sensors, digital twins, etc).

Agnès Gerphagnon and Lucille Lamotte will present the group’s latest innovations, including the LMS SoundCamera developed by MicrodB and our predictive maintenance SmartSolutions connected, autonomous sensors.

The Global Industrie fair focuses on the Industry of the Future and brings together stakeholders from the entire manufacturing ecosystem and all industry sectors. It is backed by President Macron, the French government and the Industry of the Future Alliance (AIF). From March 27th to the 30th, almost 3 thousand exhibitors will welcome over 50 thousand visitors.

connected sensors

VibraTec participates at JAAN on the 26th and 27th of October 2017 in Toulon

VibraTec contribution to JAAN 2017 (Ollioules, France, 26th and 27th of October 2017): « Acoustic transparency of Alberich coatings under high water pressure: coupled simulation methodology »

VibraTec will present a coupled simulation methodology for the estimation of the acoustic transparency (as well as reflection) of rubber coatings with periodic air inclusions (as Alberich coatings) under high water pressure. These panels are made for being implemented on underwater structures. Many challenges must be addressed: the large strain of the coating under static water pressure, the highly non-linear behavior of the hyperviscolastic material, the influence of the static deformation on the acoustic behavior. The possibilities offered by this method are of utmost interest: optimizing the design of the coating and the properties of the material to improve the acoustic performance of the coating under given pressure and temperature conditions.


Why wait to schedule your 2018 training programs ?

Referenced as an official training center and registered on the DataDock platform to enable public funding for our course attendees (from French companies), VibraTec offers courses centered around industrial vibration, acoustics, signal processing and related fields targeting engineers and technicians.

The 2018 catalogue gives the schedule for our Open programs given in France.

We also organize all of our courses on demand on-site for clients worldwide who wish to train groups of employees together, focusing on their specific field / job.

Feel free to contact our training department for more information.


VibraTec will be at SERMA’s Technology Days on September 21st and 22nd near Bordeaux

VibraTec and Serma will present the fruit of their collaboration regarding the reliability of mechatronic equipment. Very different, electronic and mechanical reliability are rarely studied together. The work carried out by VibraTec and Serma aimed to couple the two approaches in order to produce reliable mechatronic equipment. The resistance/stress reliability approach and specific mechatronic applications will be presented.


VibraTec’s training programs referenced by DataDock

VibraTec has been referenced as an official French training center for many years: we are now also registered on the DataDock platform, which centralizes information concerning French training centers to facilitate funding by “OPCA” (accredited fund-collecting / funding agencies), associations in charge of funding professional training throughout workers’ careers.

Yet another sign of VibraTec’s commitment to quality in all aspects of our activity.


We will be at the 8th VDI conference on wind turbine vibration in Bremen/Germany on June 27th-28th, 2017

VibraTec will be at the 8th VDI conference on wind turbine vibration in Bremen on June 27th-28th, 2017. We will present our expertise on experimental and numerical vibratory diagnosis techniques in this context.

 After a wind turbine was retrofitted with a new generator, much higher noise levels recorded at the foot of the tower raised concerns about its reliability. VibraTec was called to perform a thorough on-site diagnosis to determine the origin of the noise and assess the risks on the fatigue behavior of the structure. To take all possible vibration sources into account, a multi-physics approach was applied, covering electromagnetic excitation, torque pulsation, cogging torque, unbalance and bearing condition. Advanced experimental techniques such as simultaneous recording of sound pressure, current signals and accelerations were applied to assess the vibrational behavior of the wind turbine.

The results of the diagnosis gave conclusive arguments on the safety of the operation in the new conditions.



Presentation of a publication at Surveillance 9 Conference in Fes, Morocco, May 22nd to 24th, 2017

The noise from “Root” type vacuum pumps is a major disadvantage to wider use. The noise sources and the mechanisms involved in these pumps are complex, strongly coupled and their modeling is delicate (3D fluid calculations in a cavity of changing geometry, coupled with a nonlinear meshing dynamic).

The collaborative project FUI ARPE (Acoustics and vibration of vacuum pumps) aims to significantly improve the multi-physical modeling of these pumps. In this context, a measurement campaign was set up, on the one hand, to recalibrate the models and, on the other hand, to establish a vibro-acoustic diagnosis of the pumps.

VibraTec will be at the Surveillance 9 Conference in Fes, Morocco, from May 22nd to 24th May, 2017, to present the measurements performed and their uses (shock detection, psycho acoustic criteria, etc.)

New Acoustics or Vibration graduates – join our team !

We offer you the opportunity to develop your skills through rewarding and varied missions.