ALL SOFTWARE MODULES

Multi-Loop/Four-Post Control

Control one test item on a single axis

Use multiple shakers to control one test item on a single axis. With the Vibration Research control system, individually control two, three, or four loops with the same or different profiles.

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Multi-Loop Control

Engineers can use multi-loop control to control one test item on a single axis – usually the z (up/down) axis. A four-post configuration employs four shakers moving along the same axis. This method is often used for full vehicle testing, where a shaker is placed under each wheel. Four recorded field data files from each wheel are played back. Then, the recorded vibrations are played back simultaneously as if the vehicle was in motion.

 

Automotive Vibration Testing

Automotive testing is critical during vehicle development and allows test engineers to characterize the effect of long-term, road-induced vibration, and shock on the performance and service life of vehicle/engine components.

Automotive Industry Applications

VR Controllers

One VR9500/VR10500 I/O unit is required for each control loop. Each controller’s output drives a separate shaker. Engineers can individually control two, three, or four loops and set up the same profile or different profiles for each loop. The phase of the output drive is synchronized between the outputs for Shock and FDR.

  • Random: Control 2, 3, or 4 output drive loops simultaneously.
  • Transient/Shock: Control 2, 3, or 4 output drive loops simultaneously; output phase is synchronized.
  • FDR: Control 2, 3, or 4 output drive loops simultaneously; output phase is synchronized.
  • Sine: One master controller is used with a drive signal ready for the other controllers. Use multiple input accelerometers for Sine: averaging, max, min, or extremal control.

VR9500 I/O Unit

Vibration Research’s best-selling control hardware for vibration and shock testing. Scalable to 128 channels and compatible with all electrodynamic and servo-hydraulic shakers. Features include up to 200kHz sample rate and 2 outputs.

VR10500 I/O Unit

Vibration Research’s high channel count control hardware for vibration and shock testing. Scalable to 512 channels and compatible with all electrodynamic and servo-hydraulic shakers. Features include up to 256kHz sample rate and 4 outputs for multiple shakers.

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