Analyzer

Access additional graphing capabilities

Gain a deeper understanding of complex relationships between signals that are not readily apparent in basic graphs. The optional Analyzer module enhances Sine, Random, and Shock tests by comparing the characteristics of two or more signals in a series of graphs. It includes additional graphing capabilities, plots, configurable function generators, and more.

Download Demo ALL SOFTWARE MODULES

Advanced Graphing Functions

With Analyzer, data can be displayed in a number of advanced graphing functions, including transfer function, total harmonic distortion, coherence, and cross-spectrum. The available graphs are dependent on the test type.

Analyzer also offers a configurable function generator for outputting user-defined voltage waveforms. Pretest uses a low-level drive signal and uses the control and response channels to predict the requirements at full level. Intelligent startup uses the information from the pretest in the full-level control algorithm.

Watch: Analyzer Functions Webinar

Sine

Graphs	Test Settings
Scatter Plot Spectrum Transmissibility vs Phase	Pre-Test Analyzer with Swept THD Option Open-Loop Waveform Synthesis Scatter

Random

Graphs	Test Settings
Cross Spectrum Scatter Plot Transfer Function Coherence	Pre-Test with Memorized Drive (Version 2014 and Newer) Open-Loop Waveform Synthesis

Shock

Graphs

Test Settings

Transfer Function
Coherence

Pre-Test with Memorized Drive; Classical Shock Only
Transfer Function Parameters; Transient Capture Only

(Version 2014 and Newer)

Field Data Replication (FDR)

Graphs	Test Settings
Cross Spectrum Scatter Plot Transfer Function Coherence	Open-Loop Waveform Synthesis

Understanding Waveform Relationships

Fast Fourier transform (FFT) and power spectral density (PSD) mathematics are powerful tools for analyzing the characteristics of a waveform. In addition to FFT and PSD, there several types of mathematics used to understand the relationships between two or more waveforms.

To learn more, please enroll in our VRU course Mathematics for Understanding Waveform Relationships.

Transfer Function (Random & Shock)

The transfer function uses two graphs to compare:

Ratio of PSD values for two signals across a specified frequency range
Phase relationships between the two signals

Use the transfer function graph to determine phase relationships between two signals.

Coherence (Random & Shock)

Identify the relationship between the response signal and drive signal. Two signals are coherent if they have a constant phase difference and the same frequency and waveform.

Total Harmonic Distortion (THD) (Sine)

Determine the amount of harmonic content in a signal by comparing the accelerations at a specific frequency with the accelerations at the next ten harmonics. THD can be used to measure how well a shaker recreates a signal from the controller.

Cross-Spectrum (Random & Shock)

Compares one signal with another signal in time. The Cross-Spectrum graph contains data on the differences in amplitude and phase of the two signals.

Pre-Test

The pre-test feature is available only with Analyzer. Pre-test applies a low-level, open-loop output to the shaker and then uses the output and the measured response to predict the amplitude levels of the full-level test.

Watch: Analyzer Functions Pre-Test