LMS Qsources - Siemens PLM Software
Contents
1. lt 20 dB A Signal to noise ratio gt 110 dB Supplied accessories User manual Power cable Flight case Key features e High power output e Negligible self noise level e Robust lightweight housing2. hammer excitations provides inaccurate results and is often impossible to perform The frequency range allows the user to capture transfer functions over the complete frequency range from 20 to 2 000 Hz In addition its self supporting and self alignment features makes it a great exciter for modal analysis on components like engines and complete powertrains for example the average RMS force level is 6 N over the frequency range of 20 to 2 000 Hz Key features e Extremely small and powerful shaker for TPA and modal applications e Wide frequency range 20 to 2 000 Hz e Self suspending and self aligning with unique 3D internal stinger system e Internal force and acceleration measurement sensors e Built in protection electronics Application Transfer path analysis Frequency based substructuring Modal analysis Attachment point mobility measurements Physical specifications Dimensions 42 x 72 mm Total mass 0 35 kg Mass loading of the test structure 16 grams Performance Frequency range for random testing 20 to 2 000 Hz Frequency range for sine testing 40 to 2 000 Hz Force level 6 Nims Internal sensors type ICP Supplied accessories User manual Signal and power cables Electronic protection device Flight case Sensitivity sheet reference sensors Product requirements LMS Qsources measurement amplifier LMS Test Lab spectral acquisition or similar Options LMS Qsources measurement amplifier LMS Qsou
3. modal analysis using the internal volume displacement sensor as a reference Key benefits Fast reciprocal FRF acquisition e Miniature design e Accurate internal volume displacement sensor Wide frequency range Application Airborne source quantification Transfer path analysis Vibro acoustic modal analysis Physical specifications Dimensions 71 x 22 mm Mass 0 20 kg Performance Frequency response sensor 2 dB 50 to 1 000 Hz Internal sensor type Voltage Source input impedance 8 ohm nominal Power amplifier requirement 50 W and 20 Vrms Supplied accessories User manual Flight case Sensitivity sheet reference sensor Product requirements LMS Qsources measurement amplifier LMS Test Lab spectral acquisition or similar Options LMS Qsources measurement amplifier LMS Qsources sensitivity measurement Excitation hardware application training Key features e Calibrated sound source for low and mid frequency FRF measurements e Monopole characteristic e Frequency range 50 to 1 000 Hz e Real time accurate volume displacement signal e Built in protection electronics Since 1996 almost every original equipment manufacturer OEM and many automotive suppliers in the world use these sources for improving the acoustic performance of their products on a complete system level Volume acceleration sound sources are sophisticated acoustic excitation devices The source is capable of producing very high noise l
4. the reciprocal transfer functions can be measured Component suppliers in the industry use these sources to investigate vibro acoustic behavior of components like engines transmissions air conditioning units or other auxillaries The sound source level in combination with the frequency range makes this source a versatile measurement device designed to meet the needs of NVH R amp D departments To support pass by noise engineering a high frequency source has been optimized which allows to measure acoustic FRFs from 150 to10 000 Hz That same source Q MHF WIDE also offers significantly higher noise levels at frequencies over 5 kilohertz kHz making it suitable for vibro acoustic FRF measurements from interior to body interfaces and acoustic FRF measurements to other vehicle cavities Key benefits Fast reciprocal FRF acquisition e Accurate internal volume acceleration sensor e High sound pressure level e Lightweight compact design 12 The negligible diffraction makes it an accurate omni directional sound source The reference sensor is integrated at the aperture of the nozzle and measures the volume acceleration accurately The sensor is practically independent from the acoustic environment where the source is used Sophisticated electronics are integrated into the source to protect the acoustic driver against excessive power making the source a reliable and durable device To complete the service a yearly sensitivity
5. Nims Maximum peak to peak displacement 40 mm Output signal conditioning requirement ICP Mass loading axial radial 150 800 g Performances and dimensions of the device as stated above are only an approximation When used with broadband continuous random noise between 5 and 30 Hz Product requirements LMS Qsources measurement amplifier LMS Test Lab spectral acquisition or similar Key features e RMS force level up to 30 Nrms e Self supporting and self aligning e A 40 mm peak to peak displacement Full electric isolation from the test structure e Very low electromagnetic straw field Suitable for random large amplitude chirp and sine signals Miniature volume source The LMS Qsources miniature volume source has been developed to acquire acoustic FRFs at low and mid frequencies without disturbing the acoustic sound field by its presence The source incorporates electrodynamic actuators and an internal sound source strength sensor It outputs a real time volume displacement signal practically independent from the acoustic environment lts miniature size allows accurate acoustic transfer function measurements around intake and exhaust nozzles for airborne source quantification techniques The FRFs are acquired without the influence of a large low mid frequency source Its size allows it to excite structures from the inside In addition to airborne source quantification ASQ the source can be used for scaled
6. a Siemens PLM Software siemens com plm lms LMS Qsources Advanced excitation technology To design sound for the desired product sensation and brand identity a thorough understanding of the different noise contributors is key Noise vibration and harshness NVH engineers therefore require state of the art and highly accurate measurement equipment that enables new analysis methods The increasing number of product variants that need to be developed in a shorter period puts time pressure on the people conducting the measurement campaign Consequently NVH departments are demanding highly efficient excitation devices that can seamlessly be integrated into the measurement chain Benefitting from more than 30 years of experience in noise and vibration technology LMS Engineering services has provided innovative excitation hardware over the last two decades under the brand LMS Qsources hardware Covering a wide range of advanced excitation hardware LMS Qsources seamlessly matches hardware with LMS software This unique combination significantly exceeds current market standards with regard to productivity data accuracy and customer expectations The excitation hardware is developed with input from customers suppliers and LMS Engineering allowing high product functionality quality and reliability In this brochure you will find an overview of our standard products If you require a customized product LMS Engineering o
7. ction e Integrated internal stinger system Application Transfer path analysis Frequency based substructuring Modal analysis EMA Attachment point mobility measurements Time waveform replication TWR Statistical energy analysis SEA Physical specifications Dimensions 28 x 38 millimeters mm Total mass 100 grams Mass loading of the test object 10 grams Performance Sensor frequency range 2 decibels dB 50 to 5 000 Hz Accelerometer frequency range 2 dB 50 to 5 000 Hz Force level 2 Nims Internal sensors type integrated circuit piezoelectric ICP Amplifier requirement 16 root mean square of the voltage Vrms or 60 watts W to 4 ohm Accelerometer signal valid for local mass lt 10 kilograms kg and local stiffness lt 3e8 N m When using continuous broadband random noise Supplied accessories User manual Signal and power cables Electronic protection device Flight case Sensitivity sheet internal sensors Product requirements LMS Qsources measurement amplifier LMS Test Lab spectral acquisition or similar Options LMS Qsources measurement amplifier Q AMP LMS Qsources sensitivity measurement Q SR SENS Excitation hardware application training The LMS Qsources integral shaker has been designed to excite a very broad range of structures Typical test objects include complete road vehicles vehicle bodies powertrain driveline suspension systems aircraft and railway bodies an
8. d systems as well as machinery up to 10 meters m by length or 15 000 kg by weight The size allows the user to make accurate measurements in very narrow spaces Special attention is paid to the operating efficiency The installation is very easy with small removable rings This shaker can be glued to the test object with no need for extra support The special mounting bases protect the shaker from excessive glue Due to the unique suspension the force is aligned along the internal stinger axis This improves the efficiency of testing significantly by eliminating most of the support and alignment work associated with conventional shaker testing Key benefits e Optimized for use at difficult to reach locations e Extremely low mass and stiffness loading e Reduced measurement time due to easy and fast preparation e Suitable for very wide range of noise and vibration analysis The shaker installation is the only time the operator needs to be in or under heavy vehicle bodies The measurement can be performed remotely by only one operator located in a safe place as opposed to adding hammer measurements Transfer path analysis on vehicles requires a dedicated set of transfer functions from energy sources to target locations such as ear pressure or seat rail vibration If reciprocal measurements are not suitable this shaker is small enough to excite typical engine or subframe mounting locations in three directions By contrast using
9. determination of the internal reference sensor is available via your local office A one or multiple day training class provides the engineer with the necessary knowledge To deal with the challenges associated with issues such as pass by noise and electrical drivelines requiring a wider frequency band and higher noise levels the LMS Qsources high noise level version Q MHF WIDE is offered Key features e Volume acceleration sound source for mid and high frequency FRF measurements e Omnidirectional and negligible diffraction e Real time accurate volume acceleration signal e Built in protection electronics e Frequency range 200 to 10 000 Hz e Special wide frequency high noise level source optimized for high frequency excitation and pass by noise engineering Application Airborne source quantification Transfer path analysis Vibro acoustic modal analysis Statistical energy analysis Vehicle body airborne isolation Body panel and trim transmissibility Physical specifications Diameter nozzle 30 mm Tube length 4 m Mass 6 kg Performance Frequency response sensor 2 dB 200 to 10 000 Hz Internal sensor type Voltage Supplied accessories User manual Flight case Sensitivity sheet reference sensor Product requirements LMS Qsources measurement amplifier LMS Test Lab spectral acquisition or similar Options LMS Qsources measurement amplifier LMS Qsources ICP type reference sensor Q MHF ICP LMS Qsources h
10. evels more than sufficient for the excitation of complete vehicles The integrated volume acceleration sensor gives real time feedback on the emitted source strength and can be used as a reference for FRF measurements without any postprocessing The LMS Qsources low mid frequency source is designed to be used in the 10 to 1 000 Hz frequency band which is an important frequency band in vehicle development This source is typically used for transfer path analysis of structure borne or airborne noise cabin vibro acoustic modal analysis and frequency based substructuring Because most applications are for seat positions the device is optimized for quick positioning on a seat with the acoustic center at ear location which is compliant with International Organization for Standardization ISO 5128 Key benefits e Fast reciprocal FRF acquisition e Accurate internal volume acceleration sensor e High sound pressure level e Human torso diffraction effect 10 For linear systems the reciprocity principle applies As a vehicle can be seen as a linear system in practice the input and output can be switched allowing the introduction of acoustic energy at the ear location and measurement of acceleration at many force input points such as the connection of the suspension exhaust engine to the body This results in a shorter FRF acquisition time as it is not necessary to excite the system at every force input location with a hammer T
11. he unique properties of this low mid frequency source include compact human body diffraction simulation omnidirectional time stable sensitivity and high noise levels These features make this device extremely accurate and efficient for the analysis of transport vehicles like cars vans trucks buses trains and aircraft To complete the service a yearly sensitivity determination of the internal reference sensor is available via your local office A one or multiple day training provides the engineer with the necessary knowledge about these sources Key features e Volume acceleration sound source for low and mid frequency FRF measurements e Frequency range 10 to 1 000 Hz e Real time accurate volume acceleration signal e Built in protection electronics The LMS Qsources mid high frequency source is a general use monopole volume acceleration source with an internal reference sensor It is used by many research and development R amp D centers in various industry segments Automotive OEMs use these acoustic monopole sources for dedicated investigations like transfer path analysis airborne source quantification and other NVH related measurements and analyses These sources are also in use by full vehicle NVH departments for validation of the high frequency sound package of a prototype When following up the status of the sound package during a new vehicle development engineers appreciate the accuracy and the speed with which
12. igh noise level version LMS Qsources sensitivity measurement Excitation hardware application training 13 Low frequency monopole source The LMS Qsources low frequency monopole source is an omnidirectional noise generator combined with an internal sound source strength measurement The reference sensor is independent from the acoustic environment where the source is used It can excite the passenger and trunk cavity easily to measure FRFs without changing the cavity dynamics to perform accurate acoustic modal analysis This source therefore allows you multiple source excitation for accuracy and efficiency This high output source allows you to measure the typical vibro acoustic body noise transfer functions directly and reciprocally on a complete vehicle The Q MED also measures the FRF sets for pass by noise engineering Acoustic FRFs from target microphone to dominant sound sources in and around the vehicle Key benefits e 1kHz monopole source e Low frequency source e Compact design 14 Application Vibro acoustic cross vehicle FRF testing Acoustic modal analysis passenger cavity Pass by noise engineering Airborne source quantification Transfer path analysis Physical specifications Diameter 871 mm Length 200 mm Mass 1 9 kg Mounting thread M6 Sensor connector 10 to 32 male microdot Amplifier connection banana Performance Frequency response sensor 2dB 20 to 1 200Hz Sensor type Voltage alternat
13. ing current Vac Supplied accessories Manual Flight case Sensor sensitivity sheet Product requirements LMS Qsources amplifier LMS Test Lab spectral acquisition or similar Options Measurement amplifier Q AMP230V Sensitivity measurement Support solutions Training Key features Dual driver technology e Omnidirectional and negligible diffraction e Real time volume displacement signal e Integrated driver protection electronics e Frequency range vehicle FRF 30 to 1 000 Hz e Frequency range acoustic modal analysis 5 to 1 000 Hz Measurement amplifier Application Compatible with LMS Qsources exciters Mid high frequency volume source Q MHF Low mid frequency volume source Q LMF Miniature volume source Q IND Integral shaker Q ISH Miniature shaker Q MSH Thumper shaker Q TMP Custom LMS Qsources solutions Physical specifications Dimensions L W H 280 x 165 x182 mm Mass 2 15 kg Key benefits e Built in protection electronics securing connected exciters e Connectors are on the front allowing fast test setup e One amplifier for all LMS Qsources hardware e Low self noise level Performance Maximum input signal voltage 10 Vpeak Maximum output voltage 31 Vrms Maximum output current 6 5 Arms Amplification relative to input signal 32 to 28 dB Amplification accuracy 0 5 dB Frequency range 1 dB 3 dB 10 to 40 000 Hz Minimum maximum output load impedance 3 100 ohm Self noise level
14. ptimizes or develops new excitation hardware through co development This LMS Qsources miniature mini shaker has been developed to perform highly accurate structural excitation in a minimum space It provides excitation but with extremely low mass and stiffness loading of the test object The system includes integrated force and acceleration transducers This allows the engineer to obtain driving point frequency response functions FRFs very quickly The internal accelerometer measures acceleration of the stinger at the contact side The force generated by this structural exciter is not huge but it is sufficient for the excitation of car bodies engines transmissions machinery etc The mini shaker is especially suitable for those who plan to perform experimental modal analysis transfer path analysis TPA frequency based substructuring FBS and experimental statistical energy analysis The excitation device including the sensors has been miniaturized to the maximum providing an excellent solution for all those hard to reach excitation locations The mini shaker can introduce dynamic excitation where conventional shakers don t have access and impact hammers are impractical due to the connections from the suspension exhaust powertrain to the body or the interior acoustic cavity In addition the mini shaker is a very efficient exciter for modal analysis on engines gearboxes and similar components Key benefits e Uni
15. que miniature size for inaccessible locations e Efficient self supporting shaker e Reduced instrumentation time no manual alignment required e Increased accuracy integrated force and acceleration sensors e Wide frequency range 50 to 5 000 Hz Another advantage is the ability to perform FRF measurements with only one operator It improves the efficiency of testing by eliminating most of the support and alignment work associated with shaker testing and is self supporting To increase measurement speed the mini shaker can be glued to the test object easily and quickly The mini shaker is self aligning which means when the device is mounted on the structure the force is aligned along the axis of excitation saving additional setup time The mini shaker can be controlled by LMS Test Lab software spectral testing together with the LMS Qsources measurement amplifier The integrated transducers are integrated circuit piezoelectric type sensors and are compatible with LMS SCADAS hardware input modules To enable long reliable use LMS Engineering offers a specific sensitivity measurement service of the internal transducers including a detailed performance check The average force level is 2 real mean square of Newton Nims over the frequency range of 50 to 5 000 hertz Hz Key features e Unique internal 3D suspension system e Self suspending and self aligning shaker e Built in mechanical and electronic prote
16. rces sensitivity measurement Excitation hardware application training Thumper shaker The LMS Qsources thumper shaker is a compact very low frequency shaker intended for the 5 to 200 Hz frequency range The thumper shaker typically replaces instrumented sledgehammer applications and is able to excite where hammer excitation is not possible because of space constraints The lack of any external support enables fast instrumentation and there s no need to align the shaker the force sensor and the test object The shaker is mounted to a test structure by glued on rings They can be glued onto any test object in any orientation The thumper shaker s lean design makes it possible to excite in narrow spaces around machinery The force level makes it possible to apply it to large structures such as ships windmills and chemical industry installations for modal or other analyses An automotive application is available for the measurement of quasi static deformation of vehicle bodies Key benefits e High force in lean design Fast installation e Integrated axial force sensor e Very low frequency excitation e Excitation in any mounting orientation Supplied accessories Flight case Sensitivity sheet reference sensor Physical specifications Dimensioning 200 x 45 mm Weight excluding cable 1 kg Effective frequency range 5 to 200 Hz Frequency range force sensor 2 dB 5 to 1 100 Hz Maximum force level 25
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