APS ball bearing shakers air bearing exciters

Air Bearing Exciter

Vibration Exciter for Calibration and Testing Purposes

The APS Dynamics series of the air bearing long stroke vibration exciters provide excellent properties for low-frequency excitation of accelerometers and other low-frequency instruments and sensors.

These are DC response electrodynamic shakers that operate at frequencies up to 200 Hz with a peak-to-peak stroke of 150 mm (6 inches). Acceleration amplitudes as high as 60 m/s2 (6 g) can be achieved.

Some models have a horizontal air bearing table coupled to the driver unit that allows high payloads up to 23 kg for the calibration of geophones and other devices. The shakers can also operate in the horizontal or vertical orientation.

Ball Bearing Exciter

Component Testing

The APS Dynamics series of ELECTRO-SEIS shakers with ball bearings are force generators specifically designed to be used alone or in arrays for modal excitation of various structures.

They find use in forced excitation of complex structures such as floors, bridges, aircraft, spacecraft, and automobiles. Furthermore, they can be used for low-frequency vibration testing of components and assemblies.

Examples of shaker applications:

Excitation of bridges to test dynamic properties

Have you ever heard of the tragic collapse of Tacoma Narrows Bridge in 1940 which was later called the “Pearl Harbor of engineering“? Unfortunately, the structure of the bridge had not been tested the way our APS shakers can test its dynamic properties.

Airplane wing

Determination of dynamic properties, fatigue testing of substructures

Seismic Simulation

Earthquake Simulation, Field data replication


Sine excitation of forklift structure

Reference Projects

Boeing Commercial Airplanes

The APS 400 and 420 shakers were used to do modal testing at the large jet engine.

US Geological Survey

Measuring the dispersive nature of surface waves in the ground (using APS 400)

Virginia Tech

Portable Tuned Mass Damper Testing for Vibration Control of Pedestrian Bridges (using APS 113)

For more info, download the product catalogs:

SPEKTRA Catalog with calibration solutions 

SPEKTRA Catalog for structural tSPEKTRA Catalog for structural testing

For more info, please visit the APS Dynamics website.