Mazda began automobile production in Japan 1931
❍ Based in Hiroshima, in 2003, Mazda manufactured more than 800 000 cars and trucks
❍ Mazda is one of the largest employers in western Japan with some 20 000 employees
❍ Mazda’s relationship with Brüel & Kjær goes back over many years and, during this
time, Mazda has continually invested in its R&D NVH analysis facilities
❍ Mazda has several dozen PULSE ‘frames’ which provide very versatile NVH testing
and analysis capabilities
❍ In July of 2002, Mazda placed an order for a large 220-channel system for modal
analysis applications in its advanced NVH laboratory
❍ The purpose of the OMA system is to further optimise the noise parameters in the
powertrain
❍ The PULSE system can measure sound and vibration up to 12.8 kHz on all 220 channels
simultaneously
❍ The decisive factors in placing the order were Mazda’s long-term relationship with
Brüel & Kjær, its satisfaction with the existing PULSE systems, and Mazda’s confidence
in the powerful algorithms and features in Brüel & Kjær’s Operational Modal Analysis
Type 7760 software
❍ OMA’s great benefits are that it is easy to setup and modal testing can be carried
out during typical operating conditions
❍ By applying test data at the design stage, and by effective troubleshooting,
development times have been significantly shortened
❍ “High frequency noise will be a problem in the future. Therefore, we made a decision
to introduce Operational Modal Analysis based on PULSE. This is a strong and flexible
tool for multichannel and high-frequency analysis”
❍ “Using OMA, we find it easy to identify gear noise problems such as the structural
resonances of gearboxes and the effect of internal gear resonances, even if there are
complicated situations due to the high orders of rotating components, and a lot of
resonances of related structures”
❍ “Brüel & Kjær is highly competitive to other companies providing NVH solutions. We
are very pleased with our new OMA system, we have achieved significant testing
improvements, and we can use it for many different types of tests. We are expecting
even stronger cooperation with Brüel & Kjær in the future”
Mazda began automobile production in Japan 1931❍ Based in Hiroshima, in 2003, Mazda manufactured more than 800 000 cars and trucks❍ Mazda is one of the largest employers in western Japan with some 20 000 employees❍ Mazda’s relationship with Brüel & Kjær goes back over many years and, during thistime, Mazda has continually invested in its R&D NVH analysis facilities❍ Mazda has several dozen PULSE ‘frames’ which provide very versatile NVH testingand analysis capabilities❍ In July of 2002, Mazda placed an order for a large 220-channel system for modalanalysis applications in its advanced NVH laboratory❍ The purpose of the OMA system is to further optimise the noise parameters in thepowertrain❍ The PULSE system can measure sound and vibration up to 12.8 kHz on all 220 channelssimultaneously❍ The decisive factors in placing the order were Mazda’s long-term relationship withBrüel & Kjær, its satisfaction with the existing PULSE systems, and Mazda’s confidencein the powerful algorithms and features in Brüel & Kjær’s Operational Modal AnalysisType 7760 software❍ OMA’s great benefits are that it is easy to setup and modal testing can be carriedout during typical operating conditions❍ By applying test data at the design stage, and by effective troubleshooting,development times have been significantly shortened❍ “High frequency noise will be a problem in the future. Therefore, we made a decisionto introduce Operational Modal Analysis based on PULSE. This is a strong and flexibletool for multichannel and high-frequency analysis”❍ “Using OMA, we find it easy to identify gear noise problems such as the structuralresonances of gearboxes and the effect of internal gear resonances, even if there arecomplicated situations due to the high orders of rotating components, and a lot ofresonances of related structures”❍ “Brüel & Kjær is highly competitive to other companies providing NVH solutions. Weare very pleased with our new OMA system, we have achieved significant testingimprovements, and we can use it for many different types of tests. We are expectingeven stronger cooperation with Brüel & Kjær in the future”
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