A vibration controller feature used within a closed-loop test system to simultaneously generate a broadband random signal alongside multiple sinusoids.
Sine-on-random
Sine-on-random (SoR) vibration control simulates complex vibration environments with a combination of broadband random excitation and sinusoids or 'tones'. Generally, both signal types are present simultaneously and the tones may either appear at fixed frequencies or sweep over a frequency range.
A typical example is the vibration from an automobile drive train as the vehicle accelerates and the gear ratio is changed; another, is the periodic bursts of ammunition shot from an airborne helicopter.
In this type of test profile, the broadband random signal consists of a user-defined breakpoint table of power spectral density (PSD) versus frequency, as with pure random control. Up to 20 sine tones may be concurrently generated; a digital tracking filter is applied to each tone to accurately extract its amplitude from the control feedback signal.
Each tone usually has independently-set amplitude, frequency-sweep range and rate. The user may also specify a sine-sweep profile versus frequency within constant acceleration, velocity and displacement segments. Slopes and crossover points will be automatically calculated by the control algorithm.
A harmonic mode is available, whereby subsequent tones generated are an integer multiple of the first tone’s frequency. To simulate gunfire, sine tone on- and off-periods can be preprogrammed. Multi-sine functionality can be configured by disabling the broadband random, allowing multiple sine-tone excitation only.
SoR includes all of the automatic and manual test controls that are included in the random feature. A separate sine-tone track is usually displayed for each sweeping tone, providing a pre-test validation of the configuration.
File |
Description |
Type |
Languages |
Size |
---|---|---|---|---|
Vibration Control Software for VC-LAN Vibration Controller Types 7541 and 7542 | Technical Document | English | 867 KB |
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.
This will bring together HBM, Brüel & Kjær, nCode, ReliaSoft, and Discom brands, helping you innovate faster for a cleaner, healthier, and more productive world.