Why W.M. Associates?

W.M. Associates has been a preferred supplier to Fortune 100 companies for their test and quality system needs for over 30 years. WMA remains a preferred supplier by providing comprehensive, well-engineered solutions comprised of standard software products, custom interfaces, communications software and a hardware platform which best suits the applications.

Contact Info
  • 13796 Spring Street
    Burton, Ohio 44021
  • 1-800-565-2390

Noise, Vibration, and Harshness Toolkit

The NVH system was developed for production environments and is available to assist test engineers with their NVH (Noise, Vibration, and Harshness) testing needs.

Product Overview

The NVH system consists of a combination of background processes and a user interface. The background processes run continuously, but only perform data collection and analysis by request. If utilized as a stand alone tool, all data collection and analysis is performed using the Vibration GUI. When using to NVH system in conjunction with the Test System, all data collection and analysis is performed via the test sequence. The second method is ideal for improving the overall quality of the particular assemblies that are being tested.

Data Acquisition

The NVH System supports three different high speed DAQ cards:

  • XYCOM XVME-566 VME CARDS
  • UEI POWER DAQ PCI CARDS
  • NATIONAL INTRUMENTS PCI CARDS

For order analysis, the tachometer and/or encoder signals are captured using a high resolution timer/counter cards in sync with the accelerometer/microphone signals. The system also supports physical calibration with calibrators and smart sensors with TEDS capabilities to ensure the flexibility and consistent accuracy of the test results.

Standard Functions

  • CONVENTIONAL BAND POWER LIMITS
  • STENCIL EXTENSIONS & TRAINING
  • TIME, FREQUENCY AND ORDER PLOTS
  • CHARACTERISTICS FREQUENCY & HARMONIC CALCULATIONS
  • POWER SUM & MAGNITUDE CALCULATIONS

Stensil Extensions

The following types of stencils are available.

  • TEMPLATE
  • BANDED
  • ENVELOPE
  • LINE MATCH
  • B_T COMPOSITE

Stencils can be overlaid with the current test spectra, allowing the user to quickly locate a problem area. Once a stencil has been created, it will need to be "trained". There are two different methods of performing the required stencil training.

  • BATCH MODE
  • AUTO MODE

Order Tracking

The NVH System also has the optional functionality of order tracking.

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