Sine-on Random test

Description

The Sine-on-Random test (SoR test) is a combination of the broadband random vibration test and the sine sweep test. One or more harmonic sinusoidal oscillations with a fixed or sliding frequency are superimposed on a random-shaped basic oscillation (broadband random vibration). The intensity or strength of the broadband random profile is characterized by the Power Spectral Density (PSD). It typically has the unit (m/s²)²/Hz or g²/Hz.

Application using the example of vehicle and aircraft construction

SoR tests are used for products that are exposed to both random and sinusoidal vibration excitations in real operation. Components in vehicles or airplanes often experience sinusoidal excitation from the drive units in addition to the random vibration load from the environment. With the help of the SoR test, both types of excitation can be demonstrated simultaneously in accordance with practical use.