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Sine

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.

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Part number 9100

VR9100

An Industry Standard

sine vibration test profile in VibrationVIEW software

Sine is a standard test method in the vibration testing industry, so Vibration Research made sure to perfect every detail of its Sine software for efficient use. Use Sine for product evaluation and resonance search, as well as:

  • Production (pass/fail)
  • Accelerometer calibration
  • Shaker validation
  • Fixture/head expander mapping

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.

Easy Test Entry

  • 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

Input Configuration

Product stack with ObserVR1000, VR9500 and VR10500

Configure up to 512 input channels with multi-channel averaging or multi-channel extremal control. The standard frequency range is DC-4,900Hz, which can be extended up to 50kHz with the high-frequency option (VR9103).

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.

Configurable Safety Limits

Vibration Research controllers can be configured to abort if the control 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 over-driving the shaker in the case of a failed accelerometer.

Sine Sweep

sine sweep vibration test

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.

Additional Features

  • 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?

Test technicians use a sine sweep test to identify the resonant frequencies of a device under test, which is essential knowledge for product development and qualification.

Sine Resonance Phase Track & Dwell Software

VibrationVIEW SRTD logo

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

SRTD Software

Fundamentals of VibrationVIEW - Sine Resonance Track & Dwell plus High Q Sine Testing thumbnail

Fundamentals of VibrationVIEW - Sine Resonance Track & Dwell plus High Q Sine Testing

 

Additional Sine Capabilities

Accelerometer Calibration

Product collage with Shaker, VR9500, VibrationVIEW on tablet, and VR565

Perform automatic calibration and verification of IEPE and charge-mode piezoelectric transducers in-house. The calibration verification add-on software (VR9106) offers a user-friendly interface to calculate accelerometer sensitivity, saving you time and money. LEARN MORE.

Sine Data Reduction

Use the COLA output of any vibration controller to configure shaker control with a VR9500, VR10500, or ObserVR1000. Add-on software (VR9108). LEARN MORE.

Sine Step Control

Define a stepped-frequency test to step up/down a series of discrete frequency values instead of the standard continuous, varying sweep frequency. Add-on software (VR9107).

What is Sine Vibration Testing?

Sine VRU Testing CourseA sine vibration test outputs a single frequency sine tone at a defined amplitude and time. Technicians use it to identify resonances and run a test at 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

Should I Use Sine or Random?

Sine vs. RandomA 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

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