powerful tools for all acoustic and vibration applications · 2020-01-14 · such as un ece r...
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M E A S U R E . A N A L Y Z E . A S S E S S . M A N A G E .
P O W E R F U L T O O L S F O R A L L A C O U S T I C A N D V I B R A T I O N A P P L I C A T I O N S .
Müller-BBM VibroAkustik Systeme is part of the Müller-
BBM group, an engineering company based near Munich in Germany,
founded more than 50 years ago. We are an internationally operating
company providing engineering services and sophisticated technical
products and software at the highest level. More than 1200 employees
worldwide contribute to the company's success every day. Our
active employee participation model (Müller-BBM is 100% employee
owned) guarantees our independence and enables us to operate in a
sustainable way.
• Sound Design
• Online Filtering
• Hearing Comparison
• Jury Validation
• Engine Roughness
• Impact Measurement
• Shaker Measurement
• MIMO, SIMO
• Operational Deflection
Shape Analysis
• TPA, TPS, CTC, PCA
• Matrix Inversion
Psychoacoust ics S tructura l Analysis
ABOUT US
Our tools for you:
Robot based 3D intensity measurement with automatically generated model of the test object
• Order Analyses
• Kalman Filtering
• Torsional Vibration
• Angle-based Analyses
• Combustion Analyses
Rotat ional Analysis
• Reverberation Measurement
• Sound Intensity
• Sound Power
• Octave Analyses
• Sound Localization
• Exterior Noise
Classical Acoust ics
We provide market-leading measurement and analyzing tools in the
fields of acoustics, vibration and strength. With PAK, our test bench
acoustics measurement system, users have the opportunity to
combine suitably configured hardware and software (on a computer or
a smart device) for your data acquisition. In doing so, users benefit
from being always ready to measure as well as direct graphical
representation of the measurement data. Data analysis, simulation,
assessment, and modification tasks are completed in a clear and
explicit way, during or after the measurement. Data management
is highly efficient and uses the latest cloud technology, allowing
worldwide access to the corporate data network.
Our Sys tem in Ac t ion:
Whether it’s a mobile system or synchronized larger system at a
test bench, we always have the appropriate solution for you. Our
modular system comprising of measurement hardware and analysis
tools, offers you the opportunity to grow along with the changing
requirements for your tasks. The PAK system is an established and
reliable partner at NVH test benches for the engineering of:
• Entire vehicles
• Power trains
• Components
Measurements acquired by our PAK system can be triggered via
connected host computers. It was especially designed this way for
a seamless test bench integration. We support all common sensor
types for the measurement of acceleration, power, strain, airborne
noise and structure-borne noise as well as the precise recording
of rotation. Due to the dynamic nature of these parameters, it is
essential that both analog and digital bus data (such as EtherCAT®,
CAN and FlexRay™) are sampled at exactly the same time to ensure
accurate representation of the environmental conditions.
PAK scope: All channels at a glance
Boasting an extremely powerful graphics, PAK is a valuable
and performant tool to help keep track of your measurement in
every situation. In order to perform efficient mobile measurements,
important data needs to be displayed quickly and clearly. New
PAK live technology assists users with this and even enables them
to undertake the measurement without any additional computer
software. For extensive measurements at the test bench, PAK offers
fixed processes that guarantee solid and sustainable accomplishment
of measurement tasks. Regardless of the application, our emphasis is
on an open concept. All data generated with PAK automatically can be
stored in the open ASAM ODS NVH ATF/XML standard.
Structural analysis is an essential to the development, simulation,
validation and troubleshooting process and an integral element within
the automotive industry. The application field is broad ranging from
power train and other active components, to the entire body. PAK
provides various tools tailored for these specific and varying tasks.
Applying the Operational Deflection Shape Analysis provides a first
insight into the vibrational properties of a structure. First operational
measurements are conducted at operating points with and without
abnormalities before being animated. In this way the mechanisms
between the excitation and response position as well as the resulting
vibration behavior at critical frequencies can be investigated. This can
be done for both translational and rotational vibration.
Operational deflection analysis of a brake disk and power train
Impact measurement on a test object
STRUCTUR AL ANALYS IS
A structure`s vibrational behavior is determined by the natural
resonances appearing at distinct frequencies. By means of modal
analysis, the vibrational behavior can be thoroughly investigated
and transformed into a modal model. A structure is therefore excited
with either an impact hammer or a shaker in order to compute the
transfer functions. Due to the low preparatory effort required, the
PAK impact measurement is the preferred tool for troubleshooting.
It is possible to determine whether the excited subsystem can be
modified in order to avoid the resonance, or if the more complex paths
of propagation should be investigated. The PAK system provides
specially designed workflow-oriented tools for both impact and shaker
measurements.
Transfer path network Example of a Response Modification Analysis
In order to investigate more complex structures consisting of both
active and passive subsystems, such as engine and body, PAK
offers an extensive package for Transfer Path Analysis (TPA). A
comprehensive physical description of structures can be achieved
with classical TPA methods, e.g. based on the Matrix Inversion.
This determines the forces between the subsystems and the transfer
paths themselves. Individual components can be described in detail
by applying the blocked force approach or in-situ measurements.
These insights and physical properties can be subsequently applied
in the simulation process and are essential for further validation during
development. The so-called Operational Transfer Path Analysis
(OTPA) or Contribution Analysis, also forms part of our wide range
of TPA approaches and is frequently applied when troubleshooting,
such as during the localization of unwanted or disturbing phenomena
in exterior noise development. Contributions of individual sources and
Exterior noise test bench
Contribution Analysis at an exterior noise test bench
Multi-channel overview
transfer paths can be ranked and indicate possible modifications. The
Response Modification Analysis provides a more detailed insight.
Following targeted adjustments of the response signal, the modification
of individual sources is suggested. In this way a sensitivity test for the
entire system is made.
Each powertrain, either on a combustion or electric engine, usually
comprises of various rotating parts, such as the clutch, gear and
crankshaft. Rotational and torsional vibration propagates along the
powertrain and is transmitted to connected components.
ROTAT IONAL ANALYS IS
ON POWERTR A INS
Time raw data Localization of knocking sound using the revolution signal at the angle domain
A successful rotational analysis requires a highly precise rotational
speed acquisition with a high number of pulses per revolution. Besides
the exact measurement of rotational speed it is now also possible to
exactly determine the angular velocity and then consequently the
torsional vibration of the rotating part. This for instance allows for
the thorough design of the dual mass fly wheel between the engine
transmission coupling.
Order analysis with and without digital order tracking
This high precision also allows for the transformation from the time
domain into the angular domain. While the torsional vibration is only
depending on the rotational speed, a wide range of phenomena can
only be observed at distinct angular positions in the system. These
include the combustion process, piston travel and the fuel injection
system. The analysis requires the time raw data, rotational speed
and the so-called OT signal, which indicates the initial position of the
rotating system, e.g. the ignition. The time raw data is now aligned
to the angular positions along one or multiple duty cycles, allowing
the assignment of an angle to each signal. Hence, knocking noise
resulting from a damaged gear can be precisely localized and isolated.
On the exterior noise test track the new PAK pass-by application
assists users with the measurement execution according to standards
such as UN ECE R 51.02/3 (car/truck), R 41.04 (motorcycle), idle noise
(51.02/3), horn noise, ASEP (51.03), tire roll noise, R117 tire labeling
and compressed air noise – even as a one-man operation. PAK live
technology enables the measurement of different vehicles at the
same time on the same track. Benefit from the assistance offered
by PAK in complying to set criteria and from the connection to your
own database. Here, measurement duties are linked with the relevant
vehicles; while inputs and results are forwarded to the relevant
recipients.
E X TER IOR NO ISE DE VELOPMENT
R117 TIRE LABELING
UN ECE R41.04
UN ECE R51.03
UN ECE R51.02
MULTI VEHICLE OPERATION PASS-BY
PAK also provides the appropriate tools for the development of
exterior noise on and off the track. In combination with OTPA and
acoustic Sound Localization, PAK is an efficient tool for identifying
the dominant sources in the exterior noise level. Additional tools, such
as the measurement of the time signal of the single sources of the
exterior noise, complete the analysis portfolio. Different sets of tires
can be varied and revised in order to determine the changes in the
exterior noise. During this process the PAK system can be connected
to the test bench host computer, in order to further automate operation
at the test bench.
© 2016. Müller-BBM VibroAkustik Systeme GmbH. PAK, edp Müller-BBM and VAS Graphics2Go are registered trademarks of Müller-BBM VibroAkustik Systeme GmbH. All other names marked with ™ or ® are trademarks or registered trademarks of other manufacturers in their respective countries. Information listed in this brochure is subject to change without notice due to product development. We accept no responsibility for the accuracy of the information provided. ATHO1605E.
HeadquartersMüller-BBM VibroAkustik Systeme GmbHRobert-Koch-Straße 13, 82152 Planegg, GermanyTel. +49-89-85602-400 • Fax +49-89-85602-444E-Mail: sales@MuellerBBM-vas.dewww.MuellerBBM-vas.dewww.MuellerBBM-vas.com
SubsidiariesBeNeLux & UK: Müller-BBM VibroAkustik Systeme B.V.Veldweg 81, 8051NP Hattem, The NetherlandsTel. +31 529 795 036 • Fax +31 38 8450-177 E-Mail: [email protected]
China: Müller-BBM VibroAkustik Systeme Beijing LtdUnit 1002-1003, North Ring Center, #18 Yumin Road, Xicheng District, Beijing 100029, ChinaTel. +86-10-5128-5118 • Fax +86-10-8225-1626E-Mail: [email protected]
France: Müller-BBM VibroAkustik Systeme S.A.R.L.Parc Saint Christophe, 10 avenue de l’Entreprise, 95865 Cergy-Pontoise Cedex, FranceTel: +33-1-34-22-58-84 • Fax: +33-1-3422-5885E-Mail: [email protected]
South Africa: Mecalc (Pty) Limited101 Witch-Hazel Avenue, Highveld Technopark, Centurion 0157, South AfricaTel. +27-12-682-9000 • Fax +27-12-682-9050E-Mail: [email protected]
South Korea: Müller-BBM VibroAkustik Systeme Korea Ltd4th Floor, Daesong Bldg., 70-2, Yangjae-Dong, Seocho-Gu, 137-889, Seoul, South KoreaTel. +82-2-529-0375 • Fax +82-2-529-0378E-Mail: [email protected]
USA: Müller-BBM VibroAkustik Systeme, Inc.3891 Ranchero Drive, Suite 30, Ann Arbor, MI 48108, USATel. +1-734-327-4147 • Fax +1-734-327-4143E-Mail: [email protected]
DistributorsAustralia: Vipac Engineers and Scientists Ltd279 Normanby Road, Port Melbourne, Victoria 3207, AustraliaTel. +61-3-9647-9700 • Fax +61-3-9646-4370E-Mail: [email protected]
India: Welan Technologies‘Nissim’, Plot 10A, Lane No 13, Ganesh Kripa Society, Paud Road, Pune 411038, IndiaTel. +91-9225510908 • Fax +91-20-25393126E-Mail: [email protected]
Italy: BPS s.r.l.Via I. Newton, 12, 20016 Pero (MI), ItalyTel. +39-02-3534830 • Fax +39-02-33912334E-Mail: [email protected]
Japan: TOYO Corporation1-6, Yaesu 1-chome, Chuo-ku, Tokyo 103-8284, JapanTel. +81-3-3279-0771 • Fax +81-3-5205-2030E-Mail: [email protected]
Scandinavia: Müller HRM EngineeringEriksbergstorget 11, 417 64 Gothenburg, SwedenTel. +46 10 480 85 95 • Fax +46 31 744-4431E-Mail: [email protected]
Turkey: BÏAS Mühendislik Ltd. Sti.Haluk Türksoy st. 12/3 Altunizade, 34662, Üsküdar Istanbul, TurkeyTel. +90 216 474 57 01 • Fax +90 216 474 57 05E-Mail: [email protected]
Please ask us formore details or adetailed productdemonstration.
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