Controller Offers Non-Gaussion Random Vibration

Bruel and Kjaer and HBM-Ncode offer products that reduce vibration test times without exposing the vehicle or component to unrealistic vibration levels. With manufacturers facing constant pressure to shorten product design cycles, accelerating traditional vibration test times is a critical consideration. Traditional Gaussian random test signals can't accurately represent the 'peaky' vibration signals seen in the real-life use of many products.

To address this, the LDS Laser USB Vibration Controller from Bruel and Kjaer offers non-Gaussian random vibration through its Kurtosis Control software. The ability to tailor kurtosis, or 'peakedness', allows for accelerated fatigue testing that saves time, as testing with high kurtosis delivers more time at high acceleration levels. For a durability test lasting many hours, high-kurtosis testing delivers more fatigue damage than a Gaussian random test.

For simulating the conditions that brought about the measured field data, Ncode Glyphworks software by HBM makes it possible to quantify the fatigue of vibration testing and subsequently create a representative PSD or swept-sine shaker vibration test. Ncode Glyphworks enables the combination of multiple time or frequency domain data sets into representative test spectra that accelerate the test, while matching the fatigue damage seen in the field data. As HBM is a sister company to Bruel and Kjaer under the Spectris umbrella, accelerated test spectra exported from Ncode Glyphworks are easily imported into Bruel and Kjaer controllers to perform shaker table tests.

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