Distributed Digital Signal Processing Architecture

ABACUS is a compact, modular system, configurable with 4 to 32 input channels. The distributed digital signal processing hardware architecture is ideal for vibration control applications where signal processing speed is critical for realtime control. Each input module, providing up to 8 channels, has a 32-bit floating point DSP rated at 1 GFLOP. As the number of input channels in a system increases, so do the number of digital signal processors. The result is control loop processing that is not dependent on the number of input channels. ABACUS provides sample rates of up to 107 kHz for accurate reproduction of high frequency vibration. A local throughput disk in the ABACUS allows simultaneous recording to disk of time data at up to the maximum sample rate on all input channels with no loss of data.

Since measurement and output signal accuracy is essential to vibration control, high quality analog compo-nents with 24-bit analog to digital and digital to analog converters are used to provide up to 150 dB of dynamic range.

Software selectable single ended and differential inputs eliminate common mode noise associated with ground loop problems. TEDS support and ICP power are provided under software control.

Advanced Control Capabilities

Vector benefits from Data Physics more than 25 years of experience in developing proprietary algorithms for closed loop vibration control. Vector vibration control software encompasses the complete range of vibration environments. Random vibration can be controlled up to 20 kHz bandwidth, with up to 6400 frequency lines. Multi reference limit profiles provide the ability to limit the drive signal at frequencies where vibration levels can cause damage to the test article. Sine employs high quality digital tracking filters to accurately measure amplitude of true continuous swept sine signals. The resonance search and dwell option automates the identification of resonances and enables phase tracked dwell for fatigue testing.Transient frame sizes of up to 65,535 points and sample rates up to 107 kHz allow both long duration seismic and high frequency pyrotechnic shock control.

Powerful Analysis Capabilities

SignalStar Vector provides up to 32 input channels for analysis of the dynamic response of devices under test. The powerful graphical user interface makes extensive online analysis possible. Vector displays can be configured with up to 32 graph windows containing up to 16 signals each. All relevant signals are available for live display such as Control, Response Channels, Drive, Error, Transfer Functions, Reference, and Tolerance Limits. Live test data is available in both time and frequency domain. Single, dual, harmonic and peak pick cursors are available on every graph. Cursors can be locked for synchronized movement among windows, or they can be controlled independently. Annotation can be added to graphs in the form of user text or param-eters automatically extracted from the test setup or data file.

Independent Measurements

Vector has the ability to make independent measurements of transfer functions, auto spectra, and cross spectra during random vibration control tests. These measurements may be independently scheduled to occur at any time during the random test and may be tailored to the analysis task. Measurement data may be used for further analysis, such as operating deflection shape and operating modal analysis.

Throughput to Disk

Disk throughput allows continuous (gap free) simultaneous time streaming to the local disk in the ABACUS hardware during vibration control testing for all channels at up to 107 kHz. Throughput can be manually started and stopped multiple times during a single test. Throughput data can be post processed using either SignalCalc Analyzer or SignalCalc DSA software. Analysis Options include auto and cross spectrum analysis, Sine Data Reduction, and SRS Analysis.

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SignalStar Vector
Vibration Controller





The Industry Standard
SignalStar Vector is a Vibration Controller that runs on ABACUS, the world's first DSPcentric engine. Vector provides a comprehensive system satisfying all modes of vibration testing: Random, Sine, Resonance Search and Dwell, Classical Shock, SRS, Transient, Sine on Random, Random on Random, and FFT Analysis.

Powerful DSPcentric Architecture

Closed loop vibration control requires a large amount of real-time computation. SignalStar Vector Vibration Controller distributes this burden over multiple Digital Signal Processors. Vector can be configured with 8 to 32 channels, any or all of which can be combined into one control signal as an averaged or external spectrum. Remaining inputs may be used as limit channels to protect the test item. Differential inputs on all channels eliminate potential ground loop problems and provide a high level of protection against noisy environments. ICP power for all channels is standard. With a 24 bit ADC per channel, you get increased signal-to-noise ratio for accurate measurements required to control "high-Q" resonances or deeply notched references. Dual cascaded DACs with reconstruction filters generate pure analog signals for all applications, including true analog sine-sweep to excite all frequencies in a specified band.

SignalStar Vector Vibration Controller interfaces to any PC, desktop or laptop, running Windows via a high speed Ethernet connection. More features...
SignalStar Vector Vibration Controller
   

8-32 input channels
Random, Sine, Shock, SRS, Mixed Modes and Time Data Replication
Single-Axis

 
Vector.