#Mine swept software#

It is important to test for resonances, as demonstrated in this lab example and many real-world applications. The resulting vibration would reduce visibility and could be a potential hazard. Now, suppose the metal beam was a car mirror, and the resonances were excited anytime the car was on a highway. These are the frequencies where the beam vibrated at a high level in response to a vibration near or at its natural vibrating frequency. The peaks in the acceleration over the frequency graph (Figure 2.5a) indicate the resonances of the metal beam. Second, the amplitude of the acceleration of Ch2 increases dramatically near the resonance, which the engineer could see and hear.

In other words, more cycles occur per second later in the test. First, the vibration’s frequency increases over time, and the cycles are spaced closer together as time increases. At 549.4Hz, the shaker shook at a level lower than 2G, and the end of the beam shook at 37.99G.įigure 2.5b displays a sample of the acceleration Ch2 experienced near the resonance. For example, at 68.77 Hz, the control (mounting point) vibrated at approximately 1G (as prescribed). The resonances of Ch2 are evident in the graph. The control accelerometer mostly experienced 1G during the test, although there was a deviation near the resonances. Interpreting the Graphsįigure 2.5a displays the acceleration over the frequency range. The acceleration over the frequency range.įigure 2.5b. In this case, we are interested in the resonances of the long arm of the beam.įigure 2.5a. The second accelerometer will record the accelerations at this location. A control accelerometer is attached to the mounting point and connected to Channel 1 on the controller.Ī second accelerometer is attached to the end of the beam and connected to Channel 2 on the controller. Example of a Sine Sweep Testįigure 2.4 displays a shaker set up with a metal beam that represents a product. The controller also monitors the DUT’s acceleration and displays the values on a graph for the test engineer. It sends the acceleration values of the shaker head and DUT to the vibration controller.ĭuring the test, the controller monitors the acceleration of the shaker head and ensures the correct levels are applied to the DUT. However, it may be vibrating at 5,000 cycles per second (5,000Hz) at the end of the test.Īn accelerometer is a device that measures acceleration and is placed on the shaker head and device under test (DUT). Necessary HardwareĪt the beginning of a sine sweep, the shaker may only be vibrating at a rate of ten cycles per second (10Hz). Run an example simple sine test in Module 1.1 of the VibrationVIEW Syllabus. After, the engineer can analyze the results and identify peak transmissibility: the ratio of input to output acceleration.

Upon completion, the test will have run over a range of frequencies. The engineer sets the parameters for a sine sweep test, which we will discuss in the following lessons. One sweep equals a single pass from a minimum to maximum frequency or vice versa (depending on the software). The motion of the shaker is sinusoidal however, the frequency of the vibration increases or decreases throughout the test. During a sine sweep test, a vibration shaker pans, or “sweeps,” through a range of frequencies. Sine Sweep ProcessĪ frequency sweep allows the engineer to quickly observe a product’s response in the frequency range of the operational environment.

#Mine swept software#

Pass/fail criteria: determining if resonances are found in critical frequency ranges during production or pre-productionĪ sine sweep test can be employed with the VibrationVIEW Sine software module ( free demo).Reproducing field failures at resonant frequencies.A resonance test such as a sine sweep helps identify and observe a product’s response to a resonant frequency. Identifying resonant frequencies is essential to product development and qualification. Resonance can lead to damage because it amplifies the product’s natural vibration. Resonance occurs when a product is exposed to an external vibration that matches its natural frequency. Engineers use a sine sweep test to find a product’s resonant frequencies.