CATS Modal

CATS Modal adds fully integrated data acquisition, modal analysis and report generation to the Computer-Aided Test Suite. 

With options like Operating Deflection Shapes (ODS), Time Domain Animation (TDA), Forced Response Simulation (FRS) and Structural Dynamics Modification (SDM), CATS Modal provides comprehensive structural dynamics test and analysis capabilities. 

All of these features are bundled with the same powerful networking and report generation capabilities that are inherent in the Computer-Aided Test Suite.

Data Acquisition

Integrated data acquisition makes acquiring and managing large sets of modal data easier than ever.  Automated management of measurement DOF simplifies data acquisition for multiple data sets and reduces test time. 

A built-in signal generator provides user-specified excitation type (random, sine, chirp, burst random, user-defined) and amplitude control.

Upgrading to Premier Modal Data Acquisition adds the ability to acquire multiple-input, multiple-output (MIMO) modal data.

For acquisition of long time history events, the optional removable SCSI throughput disk provides simultaneous acquisition of time data to disk for 16 input channels at up to 51.2 kHz sample rate per channel

Data Analysis

By integrating data acquisition with analysis, CATS Modal simplifies the data acquisition task and provides the same powerful function data viewing capability for both data acquisition and analysis.  Function data displays include:

The optional Virtual Calculator can even provide math processing of live data streams and stored data files for complete flexibility in signal processing.

Optional modules for Transient Analysis (SRS) and Swept Sine Analysis give CATS extremely powerful and versatile signal analysis capabilities.

Modal Analysis

From creating the test geometry to animating the mode shapes, CATS Modal is designed to simplify your task.  With the automated mesh generator you can quickly building a complex geometry from rectangular, spherical and cylindrical elements.

The widest variety of curve fitters in the industry (Peak, SDOF, MDOF, and Global) ensures that the appropriate curve fitter is available for the test.

Comprehensive tools help identify modes and evaluate your results:

CATS Modal provides both time and frequency animation, with real-time control of rotation, perspective, speed, amplitude, zooming and panning.

CATS Modal Options

Advanced Curve Fitting- The Advanced Curve Fitter is a hybrid algorithm using Least Squares Complex Exponential (LSCE) and polynomial techniques which is used in estimating modal parameters for multi-reference or MIMO data as well as single reference data.

Structural Dynamics Modification - Structural Dynamics Modification allows the user to take modal analysis results and simulate changes to the structure to determine its effect on the dynamic response.

Forced Response Simulation - Forced Response Simulation uses modal results to simulate the response of the structure to a user-specified force at one or more locations on the structure. 

Time Domain Analysis - Time Domain Analysis uses measured time history data to animate a structure showing its motion during a transient, non-linear, or frequency-variant events (e.g. machine run-up/coast-down or shock response).

Operating Deflection Shapes - Motion due to excitation of the structure, such as, external forces, rotating imbalance, and gear chatter can be analyzed using Operating Deflection Shapes. 

Powerful Networking and Report Generation Capabilities