Vibration Controller


Sdyn’s Vibration Controllers are tailored in 4/8/16 channel configuration to bring users the most advanced and complete range of vibration testing solutions. Our Vibration Controllers are compatible with any make of amplifier and shaker combination available worldwide.

These controllers are perfectly suitable to perform vibration testing in all segments of the industry including defence, space, automobile, seismic, field equipment and consumer electronics. Coupled with analysis and documentation tools, our Vibration Controller makes the complete vibration system user friendly and an ideal means for checking the performance and reliability of your product against hazardous vibration environment to which your product would be exposed during usage. Our Vibration Controller can drive the complete range of electro-dynamic and servo-hydraulic shakers for single axis and multi-axis control applications in single and multi-shaker configurations.

Sdyn’s Vibration Controllers employ high speed Digital Signal Processing (DSP) technology, low noise hardware design, optimised vibration control algorithms and high speed data transfer protocols. The software and firmware are based on multi-tasking topology with close-loop control operation between DSP and PC. This ensures true efficiency of real-time control with timely correction in input excitation to counter sudden change in response of the test system. We provide powerful features, high performance, greater than 110 dB of dynamic range and control frequency range up to 20 kHz, besides providing test engineers easy-touse application software packages.

These Vibration Controllers are available with 4 to 16 input channels and are consistently modified/ upgraded to meet the demand of the latest vibration testing needs. Bundles of application software and embedded functions are specifically designed to work together so as to offer the best loop time and stable control during vibration testing. Our Vibration Controllers have the capability for making independent measurements of transfer functions and spectra of all the channels in use during vibration testing. These measurements may be independently scheduled at any time during the test and can be specifically set for analysis. Test data can be exported or imported into our software in all popular formats. Sdyn’s Vibration Controllers can be interfaced with any desktop or laptop running on Windows through USB or Ethernet interface.

Spandon Front

Spandon Back

Major Control Application of the Vibration Controller are:

Sine Control Application

scaSine Control Application provides all excitation energy at a single frequency. It generates analog signal with the help of programmable sweep parameters. Sine control application is most applicable to measure the dynamic response of any Unit Under Test (UUT).


  • Fatigue and Durability test at a single frequency or swept across a frequency band
  • Characterisation of the structural dynamics of the UUT

Resonance Search, Track, and Dwell (RSTD) Control Application

rstdRSTD performs a swept sine test to locate the resonant frequency of the UUT, tracks this resonance and dwells on it. This is an invaluable tool for automation of fatigue testing. During dwelling, a special tracking filter is used for computing phase angle information to adjust the drive frequency to track the resonance as its changes during dwelling.


  • Fatigue and Durability test at a single frequency or swept across a frequency band
  • Characterisation of the structural dynamics of the UUT

Random Control Application

rstdRandom vibration generates real word vibration environment which excites a combination of frequencies at any given instance. Due to the simultaneous generation of all frequencies within the specified frequency band, it is also called accelerated testing. Data to be recreated in represented in ‘g2/Hz’ vs. ‘Frequency’ format.


  • Production test, stress screening, prototype testing and qualification of products
  • Field measurement replication

Sine on Random (SoR) Control Application

rstdSoR is a combination of broadband random and sine tone. Sine tone can be shifted over a band of frequencies with a speed which can be linear or logarithmic.


  • Periodic bursts of gunfire form flying helicopters
  • Propeller driven aircraft
  • Automobile vibration in engine, drive train and transmission during speed changes

Random on Random (RoR) Control Application

rstdRoR merges overall power spectral density where one source of random vibration is consistent and the other varies.


  • An accelerating or decelerating vehicle on a rough road
  • Propeller driven aircraft

Sine on Random on Random (SoRoR) Control Application

rstdSoRoR control application can create profile with narrowband random and sine tone signal superimposed on broadband random signal, which can be moving or stationery. User can activate or deactivate SoR or RoR profile individually to simulate acceleration, deceleration or periodic force acting on the UUT.


  • Testing of launch vehicles
  • Gun fire from helicopter or propeller driven aircraft

Classical Shock Control Application

rstdDrop test methods do not provide accuracy and repeatability like Classical Shock testing. This tests determines if the UUT can withstand transient vibrations encountered during its life in real environmental conditions..


  • Computation of shock response spectrum
  • Bump/ Impact test replacement by shaker

Shock Response Spectrum (SRS) Control Application

rstdShock Response Spectrum testing provides the ability to synthesize a complex waveform that can be applied to a shaker in a controlled manner. It varies from Classical Shock as it provides maximum achievable response in a single degree of freedom to a given transient signal. The severity of Shock test is maximised using SRS techniques.


  • Qualification of equipment sensitive to seismic activity like Nuclear Reactor
  • A military aircraft taking off or landing on a ship – a high level and complex shock is
    induced in all the equipment while the engine is working

Transient Time History (TTH) Control Application

rstdTTH control application provides a library which can be used to create a waveform like sine, chirp, beats and white noise signal. TTH can also play a short recorded data form field to simulate a transient or a pulse.


  • Reproduction of recorded data form field on laboratory shaker system
  • Door slam testing can be conducted with TTH control application

Long Time History (LTH) Control Application

rstdLTH control application recreates field recorded data on the shaker. Unlike TTH, LTH can reproduce vibration on the shaker same as road vibration. Recorded data can be an earthquake or bumps on a road.


  • Reproduction of recorded data form field on laboratory shaker system
  • Door slam testing can be conducted with LTH control application

Technical Specifications

Spandon Vibration Controller
Channels 4, 8, 16
Resolution 24-bit ADC
Voltage Range ±10 V
Gain 1, 10 or 100
Filtering Analog + 160 dB/octave Digital Filter
Coupling Charge*, IEPE & TEDS
Bandwidth 0.1 to 10 kHz**
Dynamic Range 110 dB
Channels Drive & COLA
Resolution 24-bit DAC
Voltage Range ±10 V
Filtering Analog + 160 dB/octave Digital Filter
Bandwidth 0.1 to 10 kHz**
Dynamic Range 110 dB
AC Power 220 V, 50 Hz
Consumption 45W
Operating System Windows 7/ 8/ 10
Protocol USB 2.0
Temperature 5°-45° C
Humidity 10%-95% RH non-condensing
Regulatory Compliance
Compliance CE Marking
Safety EN 61326-1:1997, EN 61010-1:2001
  1. * Not available in all models
  2. ** With low frequency and high frequency extension package
  3. Please contact Sdyn for advice on the optimum specifications to meet your testing requirements
  4. Specifications are correct at the time of publication and are subject to improvement or amendment without prior notice

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