Case Studies

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Carlisle Interconnect Technologies - a wiring and aerospace component manufacturer -  has benefitted greatly from its new range of testing capabilities after investing in a vibration test system, the engineering team at . As well as performing demanding tests for many engineers working in their group, they are now able to offer testing services for affiliated external companies

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ディーゼルエンジンの音質を改善するために、いすゞ自動車はブリュエル・ケアーと共同で音質メトリクスマッピングを開発しまし
た。ラウドネスやシャープネス、ラフネスなど、音の知覚に基づいたパラメータ（音質メトリクス）を用い、音の特徴別に騒音源の
位置を特定できます。同時に、ディーゼルエンジンのどこから衝撃的な騒音が発生しているかを特定するために、「インパルシブネ
ス」の新しい計算アルゴリズムも開発しました。いすゞとブリュエル・ケアーのプロジェクトによって、ビームフォーミングと
SONAH（統計的最適化近距離場音響ホログラフィ）システムで使用できる、世界初の音質メトリクスマッピング用ソフトウェアが
誕生しました

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Using a simulator is unusual for a tier-one automotive supplier and helps to both develop components to exacting specifications, and communicate with customers throughout the development process.

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Volvo is increasingly moving its Noise, Vibration and Harshness (NVH) development into computer simulation and modelling, with less traditional prototyping. A well-established customer of Brüel & Kjær, Volvo benefits greatly from the value added to their systems in terms of the minimised downtime, optimised functionality, and assistance with new applications - thanks to their PULSE Software Maintenance and Support Agreement.

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Lecture hall acoustics are essential for a positive learning environment. The essential goal of room acoustics is to ensure that every
seat is the best seat. This case study presents a comparison between measured and simulated acoustical parameters in a lecture
hall. The parameters validated were the reverberation time and the speech intelligibility. Brüel & Kjær’s ODEON version 10.0 was the
simulation software used to simulate the room and the results obtained at the midrange frequencies were within 5% of the measured
acoustical parameters. Large differences were found in the lower frequency range

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Continuing a long tradition of using Brüel & Kjær equipment, Burke E. Porter supplies their wind turbine gearbox test stands with PULSE Data Acquisition Hardware and PULSE software built in, as well as the associated transducers and cabling. In this way, they incorporate the complete sound and vibration testing solution from Brüel & Kjær into a cohesive system that tests wider parameters.

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Quality requirements for wind turbine components are high, especially for gearboxes. Nanjing High Speed Gear Manufacturing Co has implemented very stringent requirements – from materials to production – to ensure the highest product quality for its customers.

NGC and Brüel & Kjær have worked together since 2006, and NGC has used Brüel & Kjær’s PULSE Data Acquisition and Analysis platform for a range of applications ranging from R&D, quality control, production testing and validation to field measurements.

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Environmental issues, particularly the impact of aircraft noise, comprise the most significant constraint on the growth potential of attractive airport businesses.

The proactive use of impact reduction approaches has resulted in significant outcomes for many airports and remains an important part of any balanced programme, however the increasing use of sophisticated tolerance-building initiatives is heralding the arrival of the new, collaborative, fourth generation aviation airport environment management.

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The automotive glass subwoofer technology has been in the development stage for a few years now. Read how The University of Windsor, using Brüel & Kjær hardware and PULSE software, including Reflex, has played an integral role in its development

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The Department of Aerospace Science and Technology (DCTA) is the Brazilian national military research centre for aviation and space flight. DCTA is subordinated to the Brazilian Air Force and coordinates all technical and scientific activities related to the aerospace sector. Noise and vibration testing play a vital role in many phases of operations and DCTA benefits from Brüel&Kjær’s complete measurement solutions. They have a large installed base of Brüel&Kjær products ranging from shakers for environmental and structural testing, noise and vibration sensors for a wealth of applications from rugged flight-testing to highly sophisticated laboratory use, multichannel data acquisition and analysis platforms, and an enormous range of noise, vibration and shock software application packages.

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The Brazilian Air Force tasked the IAE division of the Department of Aerospace Science and Technology (DCTA) with testing and validating the impact of modifications made to a medium-weight,  multi-purpose helicopter – modifications that could potentially influence both the structural and aerodynamic behaviour of the helicopter.

Using Brüel & Kjær’s PULSE data acquisition and analysis platform, Operational Modal Analysis (OMA) was carried out on both the modified and unmodified helicopter during on-ground and in-flight tests. These tests made it possible to identify any critical modes that would significantly influence the structural and aerodynamic behaviour of the helicopter with consequential maintenance and safety issues.

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Brüel & Kjær is working closely with the Institute of Aeronautics and Space (Instituto de Aeronaútica e Espaço, IAE) division of Brazil’s Department of Aerospace Science and Technology (DCTA) to deliver a range of sensors and airborne amplifiers to provide critical flight data for their on-board telemetry system for the VLS-1 satellite launch vehicle program. The VLS-1 rocket is designed to launch small satellites with payloads ranging from 100 – 380 kg for equatorial circular orbits and 75 –275 kg for polar circular orbit.

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Christie Digital Systems Canada Inc., manufactures cinema projectors and LED illumination display devices, and is a leader in visual solutions for world-class organisations, offering diverse applications for business, entertainment, and industry. Brüel & Kjær products, including the PULSE LAN-XI platform in conjunction with an LDS V875 shaker, are used as part of the stringent product testing regime to improve the design and performance of Christie’s projectors.

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Roxtec develops, manufactures and sells complete sealing solutions for cables and pipes. The Roxtec sealing system is based on Roxylon™ rubber modules with removable layers that enable a perfect fit for cables and pipes of different sizes. A PULSE LAN-XI system is used for internal R&D purposes, where Roxtec validates its existing seals and makes experimental tests on rubber. The portable LAN-XI and battery module also make the system perfect for on-site visits to customers.