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Sine

Searching for those resonances have never been easier with our Sine testing module. Here are some of the main features:

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Easy test entry

Enter frequency/amplitude breakpoints in an easy to read table form. Operator can select to control constant or ramped acceleration, velocity, or displacement. Automatically calculate and enter the frequency of intersection between any combination of constant acceleration, velocity, or displacement lines. Over 1024 separate frequency/amplitude breakpoints can be entered, allowing entry of virtually any test spec.

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Sweep type

Either linear (Hz/minute or minutes/sweep) or logarithmic (octave/minute, decade/minute, minutes/sweep) sweeps can be specified. Sweep rate can be changed in the test while running.

Test duration

Test duration can be entered in terms of length of time, number of sine wave cycles, or number of sweeps.

Tone tests

Sequences of fixed-frequency tones of a specified acceleration, velocity, or displacement can be run. Looping functions allow easy entry of repeating tone sequences.

Tracking filters

Input channels have individually selectable tracking filters to remove harmonics and out-of-band noise from the measurements. The tracking filter bandwidth and signal averaging is user configurable.

Data Storage

All of the test data can be stored to the disk for later retrieval. Data storage can be done manually, or programmed to automatically save at user-defined intervals.

Sine Webinar SRTD Webinar

Control channels

The control signal can be a single input channel, or configured from 2 to 128 input channels with either multi-channel averaging or multi-channel extremal control.

Frequency Range

Standard frequency range is DC-4,990Hz. The frequency range can be extended up to 50,000Hz with the VR9103 High Frequency option.

Sine Resonance Phase Track & Dwell – SRTD (Optional) VR9105

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 an advanced phase tracking controls that allow you to ‘dial in’ on a resonance and maintain peak amplitude by way of Phase vs Transmissibility.

Configurable safety limits

The controller can be configured to abort if the controlled acceleration goes above or below the desired level by an operator-configured number of dB. Abort limits can also be enabled for individual monitoring channels. Drive limits can be configured to protect from overdriving your shaker in case of failed accelerometers.

Multi-channel Extremal

Allows more than one input channel for control in a control strategy where the highest, lowest or an average of accelerometer readings will be used for control of the test

Large Numerical Readout

A configurable large numeric readout displays the current test frequency and channel amplitudes.


 

Force Limiting Vibration for Satellite Testing from Vibration Research

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