Model 3900 NVH Squeal Rig Dynamometer


The Model 3900 NVH Squeal Rig (Model 3900-SR) is a full-sized test machine solely designed for brake noise testing on automotive and light truck applications up to 5,650 Nm. This state-of-the-art machine incorporates a specially designed AC motor that delivers precise high torque drag capability required for NVH brake testing. The unique feature of the Model 3900-SR is its single fixed inertia disc, relying exclusively on inertia simulation and requiring no technician disc change-outs.

Fixture style is a vehicle suspension system or knuckle type and is located within a climatic controlled acoustic free field chamber. The Model 3900-SR has one purpose in mind, to pinpoint the source of brake noise and eliminate it through successful design enhancement testing.


Key Benefits

  • Latest technology software and controls
  • Proven components with low maintenance
  • Controls and power cabinet Integrated onto machine
  • Isolated test fixture from any machine vibrations
  • Large test enclosure with free field properties
  • In-line rotating torque sensor
  • Suspension test fixtures
  • Knuckle test fixtures
  • Safety interlocks on all guard doors
  • Compact pedestal workstation
  • Calibration fixture for torque
  • Video monitoring camera

Key Features

  • Tabular step-by-step test script generation
  • Customizable graphical data review software (RevDataPlus)
  • Automated reporting tools through MS-Excel
  • High accuracy electric inertia simulation (I-Sim)
  • Servo brake profile control
  • Precision sensors for measurement: noise, vibration, shaft speed, torque, pressure, fluid displacement, brake temperature, cooling air speed, air temperature, humidity
  • Integrated solutions provided by auxiliary systems (DTV measurement, water spray, etc.)
  • Power brake bleed system
  • Environmental conditioning capabilities
  • Duct silencers
  • NVH measurement system
  • AC Motor (brushless system technology)