LMS Test.Lab Structures – Options

LMS SCADAS III Hardware -


1QDAC - 4 channel Digital-to-analog Source Signal Output Module

Output signals with ultra-low distortion and noise are ensured by the use of 24-bit digital to analog bit stream converters, analog and digital reconstruction filters and up-sampling digital filters with noise shaping. The four channel Quad Digital to Analog Converter (QDAC) module includes firmware to support sine, random, burst sine or random, chirp and arbitrary signal generation.

• 24-bit signal generation
• 20kHz bandwidth
• 15V output voltage
• Short circuit protected

PQFA - 4 channel Floating/V/ICP1/TEDS Signal Conditioner

The PQFA adds a number of features to the basic PQA concept. Floating inputs eliminate the risk of ground loops, and an analog programmable high pass filter removes unwanted low frequency components. Smart transducers (TEDS) can be connected directly to the PQFA module. It helps users to drastically reduce the setup time and even more important, to avoid cabling errors, which can possibly call for a rerun of the measurement.

The worksheet provides a comprehensive view on all available 2D data (order sections, frequency sections, octave spectra or octave sections, ...) and is designed to compare and average results from various tests very quickly, for validation and/or processing. Selected data are immediately displayed via powerful display filling modes in user defined screen layouts. Embedded navigation supports fast scrolling across functions or measurement points. Individual measurements are included or excluded from automatic average and envelope calculations by tick-box selection. Averages and envelopes can be stored in a project database.

Facilitates organized printing of large quantities of data according to multiple pre-defined plot formats, created in Microsoft Office applications, including Active Pictures. Absolute scale - printing to printer and electronic documents are supported.

This add-on to the LMS Test.Lab Modal analysis workbook provides dedicated processing of modal test data that were obtained through different sets of measurements. This acquisition technique is widely used when a limited set of accelerometers is used, that needs to be relocated to measure all response point of the structure. In such case, FRF inconsistencies (e.g. frequency shifts because of mass-loading) could affect the quality of the modal parameter estimation. Multi-run Modal Analysis automatically accounts for potential data inconsistency between runs when extracting modal frequencies and damping, and during the subsequent mode shape calculation.

Deflection shapes of structures in operational conditions can be analyzed starting from either time or frequency domain. Deformation patterns extracted from order and frequency sections, FRF or Cross-Power measurements in stationary operating conditions, highlight behavior at specific frequencies just like a stroboscope. Additionally, the user can investigate deformation shapes starting from time recordings and animate the structural deformation scrolling through the time axis like a slow motion camera. Depending on the selected analysis function, a comprehensive view is given on all available data. The user can select a range wherein the animation will automatically scroll, with the possibility to pause and restart the animation at all times. The workbook also includes features to selectively animate at peaks of the function, looks for maxima between 2 cursors, etc. Any analyzed vibration pattern can be stored for future detail analysis or reporting purposes.