How does an electrodynamic shaker work?

In an Electrodynamic Vibration System the Electrodynamic Shaker works like the speakers of an audio system. The Vibration Controller generates the signal that is feed to a Power Amplifier much like an MP3 Player of an audio system. The Power Amplifier’s outputs is proportional to the input signal by a fixed gain.

What is electromagnetic shaker?

A reaction shaker is a shaker where the coil is mounted to a structure or item under test. The Model F3 electromagnetic shaker is a cylindrical, permanent magnet, reaction-type shaker that generates dynamic forces for structural excitation in vibration research and testing.

What is a shaker test?

Shaker testing allows you to predict the failure modes of an equipment or component and monitor their dynamic behaviour to improve their reliability.

How is vibration testing done?

Vibration testing is accomplished by introducing a forcing function into a structure, usually with some type of shaker. Alternately, a DUT (device under test) is attached to the “table” of a shaker. Vibration testing is performed to examine the response of a device under test (DUT) to a defined vibration environment.

Why do we do vibration test?

Vibration analysis is a process that monitors the levels and patterns of vibration signals within a component, machinery or structure, to detect abnormal vibration events and to evaluate the overall condition of the test object.

What are shaker systems?

From Wikipedia, the free encyclopedia. A shaker is a device used in vibration testing to excite the structure either for endurance testing or modal testing.

Why do we do vibration testing?

Vibration testing mimics the conditions that a product or structure might see during its lifetime while under a test environment. Used to ensure that products are robust and perform safely during operation or transit, vibration testing detects performance issues and potential failures before they start.

What is G in vibration testing?

Amplitude: The amplitude for a sine vibration test is usually specified as displacement or acceleration. G: One G is equal to the acceleration produced by earth’s gravity and is equal to 386.1 inches/sec^2 or 9.8 m/sec^2.

What are the 3 basic characteristics measured in vibration?

How far (amplitude or intensity), and how fast (frequency) the object moves helps determine its vibrational characteristics. The terms used to describe this movement are frequency, amplitude and acceleration.

What are the two types of vibration?

There are two types of vibration: whole body vibration and hand-arm vibration – both can cause ill health.

How much does a vibration analyst make?

Vibration Analysis Salary

What makes an electrodynamic shaker a shaker?

Conventional electrodynamic (ED) shakers use the same basic design configuration as a loud speaker – an AC voice coil suspended in a DC magnetic field that’s driven by an audio amplifier to produce vibration (sound). All conventional ED shaker designs have used this basic design configuration – just beefed up to industrial strength proportions.

What is the natural frequency of a shaker?

With the mounting hole open the shaker exhibited a natural frequency of 53.4375 Hz and a 3 dB band- width of only 5.46875 Hz. Blocking the mounting hole with tape or a threaded mount- There are many types of machines designed to deliber- ately vibrate structures.

How did the induct a ring Shaker work?

This inductive coupling action produces AC currents in the armature ring, thus delivering AC force output at the moving armature. This armature design was named “Induct-A-Ring” and was put into production by UD in the early 1970s. Since then, over 1,000 UD Induct-A-Ring Shakers have been built and installed in labs worldwide.

How does a pluck test work on a shaker?

Figure 2 illustrates a “pluck” test. The shaker is forced against its lower stroke-stop and held under pressure. This is abruptly released to allow the shaker to “ring.” On a small shaker such as this one, the human fingernail is an ideal load/ release tool; larger units may require alternate transient load- release fixturing.