Structural and modal analysis

SignalCalc 900 Provides a Complete Modal Data Acquisition Solution for Small or Large Structural Tests

Modal measurements are typically done with an impact hammer or with a modal shaker. Both require special signal processing features such as pre-triggering, special windowing functions, source triggering, preview capture, etc. which are standard features in the SignalCalc 900 Analyzer suite.

The software also provides an automated book-keeping scheme that tags each measurement with structural geometry information that can be easily exported to modal animation or curve fitting applications.

Transfer Function Measurements

>140 dB dynamic range

Useful for high signal-to-noise measurements and is imperative for high Q structures such as turbine blades

Transfer Function Measurements

TRFs based on H1, H2 and Hv (opt 71) techniques are provided to account for the presence of noise on the input/output channels

Rectangular, Hanning, Flat Top, Force, Exponential Windows

Minimize spectral leakage as needed for your setup

Preview Average mode

Examine time and frequency domain views of impact hammer data before accepting into the measurement

Up to 51,200 frequency lines of resolution

Isolate closely spaced modes

Structural Geometry

Dynamic Signal Analyzer Training with Data Physics

Structural Geometry Information

Easily assign Rectangular, Cylindrical or Spherical coordinates to measurements

Programmable sequencer to tag point and direction

Automate the tagging of point/direction when taking many measurements –  Particularly useful during an Impact Hammer test when roving the hammer across different locations

File Export to modal analysis or animation programs

Automatically or manually export to MEscope, UFF, Matlab, SDF, ASCII/CSV

Shaker Excitation and MIMO Analysis

Shaker Testing Excitation

SignalCalc 900 offers a large range of output (DAC) signals to cater to variety of measurement situations – Random, Burst Random, Pseudo Random, Sine, Swept Sine, Square, Swept Square, Chirp, Impulse, etc.

Multi Output Multi Input Analysis (opt 71)

Analyze modal properties in complex structures by exciting with multiple shakers at different locations simultaneously. Excitations from different DAC channels are uncorrelated ensuring highest quality transfer functions

MIMO Dual Shaker Modal

Custom Reports and Data Review/Export

Fully Customizable Plots

Include readouts including test parameters, customer and test article name, operator, test time, etc

Overlay Data

Data from one or more runs/saves can be overlaid in Review Mode within seconds.  The overlaid plots can be placed in a report.

Data Export

Data can be exported automatically during or after a test

Create Custom Report Templates in Word

Create a report template in Microsoft Word and have SignalCalc 900 populate the report parameters, plots, and images automatically after each test (DP900-68)

Images and Media

Attach images of the test article or setup and have them printed in the report

Generate Reports Anywhere

Generate Reports on the PC that conducted the test, or on any networked PC

1 Measurement Saves

Review panel provides a quick way to browse through the individual saves or overlay them for comparison

2 Modal Damping

A single degree of freedom circle fit method is provided to identify natural frequencies and estimate damping values

3 Hammer Impact

Pre-trigger delay provides a way to display the complete impact hammer signal