Fatigue testing may require multiple sine sweeps through the frequency range at different sweep rates. Use Sine-on-Sine to run a multi-sine vibration test and excite up to 32 sine tones simultaneously. Sine-on-Sine is one of the three mixed-mode testing modules in VibrationVIEW.
Download Demo All Software ModulesEngineers often use a standard SRTD test to bring the device under test (DUT) to failure. For a fatigue test, they may need to run multiple sweeps through the frequency range at different sweep rates. The time required to do so can exceed tens of hours.
With a multi-sine vibration test, the engineer can run multiple sine tones at different rates simultaneously. This feature saves time for engineers running fatigue testing and allows for the excitation of multiple resonant frequencies at once.
Enter frequency or amplitude breakpoints of the background random acceleration spectrum in an easy-to-read, tabular format. You can use frequency or amplitude breakpoints or enter one endpoint and the desired dB/octave slope. VibrationVIEW supports 1,024 breakpoints, suitable for virtually any test specification.
1 to 32 true floating-point precision sine tones can be superimposed on the background random spectrum and swept back-and-forth between frequencies at a user-programmable rate. The amplitude and frequency sweep parameters are all user-programmable.
Configure up to 512 input channels with multi-channel averaging or multi-channel extremal control. The standard frequency range of DC-4,990Hz can be extended up to 50,000Hz with the VR9103 High-Frequency option.
VibrationVIEW supports multiple control input channels (multi-channel extremal) when using the highest, lowest, or average accelerometer readings for test control. Input channels can have individual tracking filters to remove harmonics and out-of-band noise from measurements.
Run sequences of fixed-frequency tones of a specified acceleration, velocity, or displacement. Test duration options include the length of time, the number of sine wave cycles, and the number of sweeps.
A test engineer may run a sine resonance track & dwell (SRTD) after they have determined the resonances of a test item with a sine sweep. SRTD is meant to bring a product to failure by exciting a known resonance.
During a sine dwell test, the vibration controller runs a single sine tone at the product’s resonant frequencies rather than sweeping through the frequency range. A product experiences the most fatigue when exposed to its natural resonance. The test is run until failure occurs, or sufficient time has passed without failure.
Transmissibility peaks can be automatically detected from a sine sweep, and then dwell tests run at the detected resonance frequencies for a specified time duration or number of sine wave cycles. In a sine dwell test, the controller can automatically track the resonance frequency to keep the output on resonance even when fatigue damage causes the resonance frequency to shift. Track High Q or sharp resonances with advanced phase tracking controls that allow you to dial in on resonance and maintain peak amplitude by way of Phase vs. Transmissibility.
