Random-on-random Vibration Control

Random-on-random vibration simulates the vibration environment in military tracked vehicles or any vehicle in which the overall random power spectral density is related to a variable speed device or shifts with time. The vibration stress on a truck's headlights while the truck changes speed over a rough highway would be another example of using random-on-random to simulate the real world on a lab shaker system. 

  • Simulation of vibration characterised by broadband random with one or more superimposed narrowbands
  • Military tracked vehicles or propeller-driven aircraft
  • Truck vibration during speed changes


  • General features of random vibration control software are included
  • Up to 12 narrowbands
  • Narrowbands may sweep or be fixed with harmonic or non-harmonic sweeps
  • Amplitude-frequency profile for each narrowband with PSD amplitudes and frequencies plus slopes with automatic crossover calculation
  • Manual on/off control of individual narrowbands during a test
  • Choice of summing method for narrowbands and broadband

In random-on-random, the broadband random is a user-specified breakpoint table of power spectral density versus frequency, as in the random vibration control software. Each narrowband has an independently set PSD amplitude, frequency sweep range, and sweep rate. The user can also define a profile of the PSD amplitude profile versus frequency. Narrowband can sweep independently or in a harmonic mode.

Random on random vibration control
Random-on-random simulates vibration environments inside tracked vehicles, propeller driven aircraft, and trucks driving on a highway.
We help our customers measure and manage the quality of sound and vibration in their products and in the environment

Brüel & Kjær Sound & Vibration Measurement A/S. P +45 77 41 20 00. F +45 45 80 14 05. info@bksv.com
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