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System for multi-shaker or hammer excitation -
This LMS Test.Lab MIMO Modal Analysis solution provides an extremely productive state-of-the-art modal testing solution supporting structural excitation by up to 4 shakers or by impact hammer. Frequency Response Functions can be measured for up to 18 tri-axial vibration transducers or 59 single axis response channels. All channels support ICP® transducers or any Voltage signal, and are IEEE-1451.4 TEDS compatible.

The Geometry workbook allows fast generation of wireframe and full 3D visualization of test and analysis results. Through TEDS support, geometry creation is further accelerated with the position information from pre-programmed transducers.

The Modal Shake workbook provides dedicated test setups for a multiple shaker FRF test, including excitation level balance checks and input force de-correlation validation. The Modal Impact workbook offers embedded expert guidance for parameter settings, with immediate feedback showing the effect of parameters changes on the last measurement. Both workbooks support automatic active channel detection for one-man calibration functionality. The Operational Deflection Shapes add-in gives immediate feedback to validate the correctness of FRF (transducer position, orientation, calibration, SNR, etc.) by on-the-spot animation of the geometry model.

The Modal Analysis workbook offers various fast and accurate single or multiple reference parameter estimation algorithms, and a complete set of modal model validation tools, such as MAC and FRF synthesis. With the crystal-clear stabilization diagrams from the LMS PolyMAX parameter estimation algorithm, the analysis process is significantly simplified and operator-dependency of the resulting modal model (typical for complex, highly damped structures) is eliminated.

Features & Benefits

• Excitation by up to 4 shakers in parallel

• Online level and de-correlation check of all excitation inputs

• Parallel measurement functions (FRF, coherence, PCA, spectra, etc)

• Driving Point & on-line dynamic stiffness checks using online reference curves

• Immediate visualization of FRF measurements on 3D geometry

• LMS PolyMAX state-of-the art modal parameter estimation technology

• Advanced Data & Model validation toolset

• Reduced test setup time

• Minimal training required

• Reduced test execution time & minimized test item reservation through high channel count, multiple excitation DOF and on-the-spot analysis and validation

• Immediate validation of measurement and analysis quality – reliable base data and high quality modal model

• Effectively deals with highly damped structures and non-linear materials

• Yields user-independent results

• Easy traceability with full documentation, data management and reporting