Set up and perform a sine vibration test with ease
Automatically detect resonances using a swept and/or fixed-frequency sine wave test with control of acceleration, velocity, and displacement. Then, use a sine resonance tracked dwell (SRTD) test to determine the number of cycles required to generate a failure at a specific resonant frequency. Sine features include easy test entry, configurable tracking filters on input channels, and a large numeric readout.
Enter frequency or amplitude breakpoints in an easy-to-read, tabular format. VibrationVIEW supports 1,024 breakpoints, suitable for virtually any test specification.
Control constant or ramped acceleration, velocity, or displacement.
Automatically calculate the frequency of the intersection between any constant acceleration, velocity, or displacement.
Configure up to 512 input channels with multi-channel averaging or multi-channel extremal control. The standard frequency range is DC-4,990Hz, which 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.
Specify linear or logarithmic sweeps.
Change the sweep type while the test is running.
Easily repeat tone sequences with the looping function.
Set individual sweep rates and tolerances by segment.
When Should I Run a Sine Sweep Test?
Engineers use a sine sweep test to find the resonant frequencies of a test item. The identification of these resonant frequencies is essential for product development and qualification. A resonance test such as the sine sweep should be performed if a test engineer needs to identify and observe a product’s response to a resonant frequency.
Sine Big Display
A configurable large numeric readout displays the current test frequency and channel amplitudes. Use the manual control to manually control the sweep direction, sweep rate, and scale the amplitude with your mouse cursor.
Configurable Safety Limits
Vibration Research controllers can be configured to abort if the controlled acceleration goes above or below the user-defined dB level. Abort limits can also be enabled for individual monitoring channels. Drive limits can be configured to protect you from overdriving your shaker in case of failed accelerometers.
Sine Fundamentals Webinar
Fundamentals of VibrationVIEW - Sine
What is Sine Vibration Testing?
A sine vibration test outputs a single frequency sine tone at a defined amplitude and time. It is most often used to determine resonances and to expose the test item to a resonant frequency until failure. A sine test is:
A basic test that is simple to set up and perform.
One of the best methods for identifying resonances.
An effective way to bring a test item to failure, if the failure arises from the excitation of a known resonance.
There are several ways to conduct a sine test. A sine sweep exposes the test item to a sine tone with a frequency that varies across a defined range. The test engineer determines the resonant frequencies of the test item from the sweep test. Then, they can expose the test item to the resonant frequencies until failure or until enough time is spent at each resonant frequency to ensure a failure will not occur. A sine test sends all the shaker’s power to the resonant frequency where the failure will occur.
Should I Use Sine or Random?
A sine test outputs a single frequency sine tone at a defined amplitude and time. A random vibration test outputs random vibration throughout the test that includes the test’s entire frequency range. Random testing is more realistic than sine testing because real-world vibration is inherently random.
However, sine is a more suitable test method for:
Identifying resonances in a test item.
Identifying issues with the shaker system (cracked armature, loose bolts, etc.). Variations in the response, especially if there are resonances that shift significantly, indicate there is an issue in the shaker system.
Validating Fixtures. If the fixture has resonances in the test frequency range, the results of the test will be questionable.
Qualifying a product if product failure arises from the excitation of a known resonance.
What is a Resonance?
Resonance occurs when the frequency of an external force is the same or nearly the same as the natural frequency of a structure. The frequency response of the structure is amplified when its natural vibration is excited, which can result in structural fatigue or damage.
Sine Resonance Phase Track & Dwell Software
Automatically detect transmissibility peaks from a sine sweep, then run a dwell test at the resonance frequencies for a specified time duration or number of sine wave cycles.
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.
Dial-in on resonances and maintain peak amplitude by way of phase versus transmissibility.
Fundamentals of VibrationVIEW - Sine Resonance Track & Dwell plus High Q Sine Testing
What is Sine Resonance Track & Dwell (SRTD)?
A test engineer runs a sine resonance track & dwell (SRTD) after they have determined the resonances of a test item with a sine sweep. SRTD brings a product to failure by exciting the 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.