Extend asset service life thanks to VibraTec’s expert...
Quality control is of utmost importance to industrialis...
Converting data into information to improve structural ...
MHEV, PHEV and BEV vehicle benchmarking...
Optimization of E-Powertrain acoustic treatment...
E-powertrain design to reach performance and NVH target...
Experimental validation of numeric planetary gear set b...
Improve your skills in our October training sessions...
Acoustic transparency of Alberich coatings under high w...
Get your school year off to a good start – with some ...
Bearing and gear fault detection using Machine Learning...
There are no passengers on spaceship earth....
Jessica Neufond will represent VibraTec in Le Mans on 1...
September 2018 International Railway Conference : ̵...
Dealing with gear noise of real industrial systems: an ...
Innovate with VibraTec ! We will be at the Smart Indust...
The JASA (Journal of the Acoustical Society of America)...
Small company or multinational ? Come talk to VibraTec ...
The VibraTec Group – actively involved in training to...
VibraTec – preparing students for the real world...
VibraTec E-Noise Training in Shanghai China...
Why wait to schedule your 2018 training programs ?...
VibraTec’s training programs referenced by DataDo...
Extend asset service life thanks to VibraTec’s expertise in fatigue analysis and approach to evaluate remaining life
Remaining life provides visibility of the structure’s future life to anticipate difficulties and guarantee long-term quality of service. Analysis of this parameter is an important part of asset management for structures designed to last for decades, like railway transportation networks.
In this specific case, the method quantitatively assesses the remaining life of railway network car bodies. Operation and maintenance road maps serve as guides to reach service life objectives.
Structural modification can also be evaluated to optimize life duration, providing support for investment teams, helping them optimize their asset management strategy.
Quality control is of utmost importance to industrialists
VibraTec is able to assist clients with completely adapted and bespoke solutions.
VibraTec and Aptiv recently worked together to develop a contact force test rig to validate product quality on the production line.
And it’s a success !
Converting data into information to improve structural diagnosis
A step back on how to best use the wide variety of Machine Learning tools and data processing in predictive maintenance applications.
The aim is to present a flexible methodology that can be generalized to predictive maintenance problems. How to adapt raw signal pre-processing according to objectives ?
The outcome of this work comes from the diverse projects carried out at VibraTec. With the current massive development of these technologies, it is important to select and master those that are most appropriate.
“Science without conscience is but the ruin of the soul”. Anyone can use Machine Learning; it is important to understand its potential and limitations to do so properly.
International conference on gears 2019 (VDI Munich)
Contact: Alexandre Carbonelli
MHEV, PHEV and BEV vehicle benchmarking
CO2 regulation of passenger cars forces automotive manufacturers to develop electrified vehicles. In this booming market, high-value NVH data is needed to define competitive technical strategies. VibraTec has the test capabilities and know-how to benchmark electrified vehicles from sub-system characterization (motor, gearbox, etc) to full powertrain Transfer Path Analysis (TPA), including rolling noise contribution analysis.
We provide full characterization of vehicle or subsystem NVH performances following client good practice needs / requirements:
- Compliance with OEM internal procedures,
- Reliability of results based on large NVH experience.
After other makes, VibraTec is currently benchmarking the Hyundai Kona and plans to measure other models in the future.
Optimization of E-Powertrain acoustic treatment
The ability to rank E-powertrain components in terms of acoustic contribution is essential to e-powertrain design. A useful second step is to evaluate acoustic treatment effectiveness.
VibraTec has built a test bench to address these needs. Several microphone arrays are used to measure acoustic maps of the powertrain installed on the bench. Within 2 weeks, the components responsible for the majority of the acoustic power are identified; 7 configurations are tested and ranked in terms of effectiveness.
No need of an anechoic chamber, tests can be realized anywhere.
More information, training programs and expert consultation here.
E-powertrain design to reach performance and NVH targets
Often, the first E-powertrain prototype does not correspond to NVH specifications. At this stage, there is little time for re-design, and only slight modifications are possible to address NVH requirements without performance loss.
VibraTec has developed a multiphysics optimization algorithm that takes client targets and constraints into account. The algorithm optimizes several parameters, virtually guaranteeing that NVH specifications will be respected.
On the whole, VibraTec’s algorithm reduces acoustic power levels at critical operating points by at least 5 dB, and up to 20 dB in certain cases. NVH specifications are fulfilled, performance and manufacturing processes are maintained and no acoustic treatment is required.
More information, training programs and expert consultation here.
Experimental validation of numeric planetary gear set behavior
The numerical model developed during Jessica NEUFOND’s thesis on the dynamic behavior of planetary gears has been validated by a campaign measuring a variety of planetary gears presenting a large number of tooth profile modifications. From the characterization of static transmission error to the vibratory state of the housing, the experimental data were compared to the numerical results from a dynamic model, validating the developed model.
Contact us for more information.
Improve your skills in our October training sessions
The perfect occasion to upskill colleagues before the end-of-year stress:
- October 8th & 9th will clarify “Signal Processing”, providing an overview of various signal processing methods applied to acoustics and vibration, characteristics and criteria to choose among the different types of treatment.
- The 15th through the 17th will give you 3 days to get the global picture concerning Railway noise – vibration – reliability applied to three aspects of railway activity:
- Understanding railway noise, vibration & reliability,
- Establishing design and testing methods and procedures,
- Managing issues relating to both main lines (high-speed / freight trains) and urban conditions (subway / tramway).
VibraTec is a training center recognized by the French administration and French professional training funding centers. There are still openings for our sessions in October – why not try one out ?
Acoustic transparency of Alberich coatings under high water pressure: coupled simulation method
This innovative simulation method estimates the acoustic behavior of elastomeric coatings taking into account the influence of temperature and pressure conditions. The implemented procedure is based on the coupling between a nonlinear static simulation (taking into account the hyperelastic nature of the involved materials) and a linear acoustic simulation (taking into account the viscoelasticity of the materials).
This type of method is used for optimizing underwater coatings; VibraTec is an innovative player in the field.
The method is applicable to estimate the acoustic performance of any system incorporating elastomers under stress (seals, absorbent coatings, etc).
Get your school year off to a good start – with some professional training !
The aim of our training courses is to disseminate our knowledge and understanding of industrial vibration, acoustics, signal processing and related fields to our course delegates.
The 4th and 5th will provide an opportunity to learn more about “Finite Element Model Updating“: understanding the use of simulation before testing, correlating calculation / measurement, identifying and differentiating methods and tools.
The Oil & Gas industry course on the 11th and 12th of September will address “Vibration Control in the Oil & Gas Industry”: vibration phenomena, the technical support that computation and measurements can provide, efficient technical approaches to prevent and/or solve vibration problems.
New this year, a 2-day “Noise from Gear Systems” program on the 17th and 18th provides insight into how gear systems function, the forces, mechanical & dynamic phenomena involved, origins of gear noise – and will enable trainees to analyze a gear system’s dynamic behavior.
The 24th of September 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.
The 25th & 26th, our “Experimental Vibration Analysis” course will present the main causes of vibration problems in industry, an overview of various measurement techniques and notions of how to mitigate problems.
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.).
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.
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.
September 2018 International Railway Conference : ‘Rad-Schiene’ in Dresden
The French collaborative railway research project CERVIFER aims at accelerating Virtual Certification of Railway Systems. In this framework, computer models are used to compute the train-track interaction during the passage of switches.
From a geometrical description of a VOSSLOH switch and dynamic contact forces from measurements performed on an RATP commuter train, VIBRATEC built a multi-body model with the software VOCO, developed by IFSTTAR.
At the 16th International Railway Conference “Rad-Schiene” in Dresden, VIBRATEC specialist Martin Rissmann will present the difficulties and challenges of such models and the need of high quality measurement data.
Dealing with gear noise of real industrial systems: an overview of the difficulties and the achievements
Alexandre CARBONELLI will present the philosophy of the research led by VibraTec in the gear dynamics field at the International Gear Conference in Lyon-Villeurbanne from August 27th to 29th.
The presentation gives general feedback on the latest studies and on the position of a research engineer working in the gear dynamics field.
Between academic science and the pragmatic constraints of the engineer’s job, it is important to have a strong expertise in order to work with the correct assumptions and the appropriate tools.
The close collaboration with the Laboratory of Tribology and System Dynamics (LTDS) of the Ecole Centrale de Lyon makes it possible to invest research efforts to answer real industrial concerns.
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.
The JASA (Journal of the Acoustical Society of America) chooses MicrodB as the latest Technical Area Pick in Signal Processing
The article, entitled “Instantaneous Bayesian regularization applied to real-time near-field acoustic holography”, was published on August 16th 2017. It has been chosen among all articles related to signal processing published throughout 2017.
MicrodB’s technological developments make it possible to reconstruct non-stationary acoustic sources (closing doors, rotating sources, transitory phenomena) using acoustic imagery.
The main scientific development is to have solved the inverse problem by using a Bayesian approach that significantly increases the method’s stability. The method is also enhanced to allow the reconstruction of long signals.
Small company or multinational ? Come talk to VibraTec personnel at the INSA’s Professions Day on January 31st
VibraTec is a regular participant at this annual event organized by the INSA Lyon’s Mechanical Engineering Dept.
Four VibraTec experts will be participating this year :
- Hervé GOUTAGNY, Project Manager, will share his career experience;
- Emmanuel REYNAUD, Sales & Project Manager, will compare work in an SME and work in a multinational ;
- Cyril GAUMAIN, Head of Department, will explain how R&D is integrated in SMEs ;
- Fanny QUERVILLE will be at our stand to present current openings (internships & jobs) and review student resumés.
The VibraTec Group – actively involved in training tomorrow’s technicians and engineers
“Our continuous presence at the heart of higher education creates connections with our future clients and partners.” Christian Clerc, Scientific Director.
A few employees are on Engineering & Master’s program steering committees. Some complete Engineering school’s theory classes with concrete applications implicating state-of-the-art technology.
Others teach in technical schools throughout their 2- or 3-year programs. In this context, VibraTec opened its lab to a class of 1st-year students from the IUT in St Etienne on December 14th. The students shared the daily life of technicians and talked with alums who now work at VibraTec.
These diverse contacts with the reality of industrial life are an important element of each one’s career choices.
VibraTec – preparing students for the real world
This year as usual, VibraTec visited the IUT of Saint Etienne’s Applied Physics Department, helping to bridge the gap between academic theory and the reality of the working world.
VibraTec offers students the possibility to discover various examples of what a vibration – acoustics techician’s job is: concrete case studies, measurement methods & material, professional profiles, the pertinence of knowing English, etc. This helps clarify student orientation – and gives some the desire to work at VibraTec during their training and/or afterwards !
A group of students will also visit our headquarters in December to discover our lab and exchange with our teams on their day-to-day lives.
VibraTec E-Noise Training in Shanghai China
VibraTec, through its partner YiDuo is organizing its very first customized E-Noise training in China comprising a 3-day session on “Noise from Electromagnetic Origin” to be delivered in Shanghai from 25th – 27th September 2017. This training targets management, engineers and technicians working in the field of design and application of electric machines or vibroacoustics. The intended program will cover the following topics:
- Day 1: Electrical machines (architecture, operating principle and control) with their associated power converter and control strategies;
- Day 2: Noise from electrical machines and power converters (magnetic excitations, vibrational behavior, radiated noise, important parameters);
- Day 3: Examples and questions / answers.
Practical cases including illustrations from VibraTec’s own Research & Development projects in the automotive field (powertrain, power converters and electric motor) are also part of the itinerary.
The training will be delivered by one of VibraTec’s E-Noise specialists, Sylvestre LECURU.
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’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.
Technicians - we are recruiting !
If you are a noise &/or vibration specialist, this could be the perfect occasion to enrich your experience: our group, well-known for its expertise in acoustics and structural dynamics, works on very diversified projects.