SignalForce ELECTRODYNAMIC SHAKERS
SignalForce ELECTRODYNAMIC SHAKERS
Force Outputs 80kN to 222kN
Force Outputs 9N to 60kN
Force Outputs 30N to 250N
WATER COOLED SHAKERS
Data Physics’ range of water cooled shakers are used for many different applications, such as testing automotive sub-assemblies, military and defense components, large electronic components, and even fully assembled satellites.
By utilizing the dual hydrostatic bearings that are incorporated in the shaker design, payloads with high overturning moments can be tested without the need for external guidance systems.
The water cooled shakers may also be supplied with horizontal slip table systems for 3 axis testing.
Shakers from 80 kN to 222 kN
All Models are water cooled. Large force systems include chillers.
Dual Hydrostatic Bearings
Good axial and torsional stability
Special suspension options
Automatic Load Support and armature centering
Payload Support up to 1365 kg
Water cooled shakers cover the force range 80 kN to 222 kN.
These shakers all produce 3″ (76.2 mm) displacement all are water-cooled.
All models may be supplied on high quality pneumatic mounts, for vertical vibration isolation, in trunnions for horizontal and vertical operation, or in monobases for three axis testing using a slip plate.
All water cooled shakers have axial guidance using dual hydrostatic bearings and pneumatic load support they may also be supplied with automatic load support systems to ensure the armature remains in its central position when payload is added or removed.
By using hydrostatic bearings, the SignalForce water cooled shakers are able to handle large overturning moments without requiring external guidance in the head expander.
Larger payloads may be supported through the use of load bearing platforms and head expanders.
AIR COOLED SHAKERS
Air-cooled shakers are the workhorses for many component testing applications such as automotive assemblies and consumer electronics equipment.
The Data Physics range includes many shaker models with axial guidance bearings and 2 inches (50mm) displacement with our largest air-cooled model offering 2.5 inches (63.5mm) continuous displacement.
All cooling blowers for these shakers include noise reduction silencers, all models feature high levels of efficiency.
Data Physics’ range of small shakers is in use all over the world. Some have even been taken into space for special experiments under zero gravity conditions.
Applications have included medical research, electronic component testing, materials analysis, automotive component testing, tyre balancing and actuator applications for antenna positioning using low axial stiffness special suspension units.
Data Physics’ range of air-cooled shakers have found application testing in Formula 1 racing cars, mobile telephones, health & safety type approvals, materials analysis, avionics systems and electronic sub-systems testing.
These shakers provide high lateral and torsional stiffness to provide maximum stability and support. This produces high performance and low distortion levels.
MODAL & INERTIAL SHAKERS
The M series of modal shakers use linear bearings, in place of the more common suspension systems, to produce virtually zero axial stiffness and virtually zero mechanical damping.
When combined with Data Physics’ linear amplifiers, operating in current mode, the resultant system force output will exhibit typically less than 1% electrical damping and the phase shift between drive current and force output will be typically less than 1°.
When large structures need to be tested, inertial shakers provide the ideal solution. The central spigot is attached to the structure under test and the body then provides the inertial mass.
These shakers have found applications for testing buildings, floor loading resonances, ship’s decks for helicopter loading, squeaks and rattle testing in cars, geological exploration, helicopter rotor simulation and active vibration cancellation.
The Modal shaker series exhibits almost zero axial stiffness, while offering very high radial stiffness for stability.
This performance combination is achieved through the use of a linear guidance bearing.
There are 6 models of modal shakers with a total of 10 variants.
Previous applications include the testing of airframes, space lab structures, automotive chassis, road surfacing materials and artificial limb joints.
Force outputs from 80N to 2,115 N
Virtually zero axial stiffness
Testing of large structures can often present considerable difficulties, so when the payload can’t be mounted on the shaker Data Physics can provide a shaker that can be mounted on the payload.
Inertial shakers are fully enclosed, permanent magnet shakers that can be mounted on to structures at any angle – they are entirely self-supporting.
Inertial shakers have found applications testing car chassis, building structures, ships’ flight decks, helicopters, submarines, geophysical surveys and vibration cancellation systems.
Force outputs from 30N to 250N
Tunable suspension to produce peak force at low resonant frequencies
Options for cooling by airline or by standard blowers
SELECTING THE RIGHT SHAKER
The first step in selecting an appropriate Shaker is to define the test profiles that are to be run (sine, random, shock, replication, etc.) and to gather dimensional information on the test article and fixtures that will need to be used (LxWxH and total mass).
For any shaker, the added mass of the DUT (Device Under Test) and fixtures moves the performance envelope from the black line to wherever the blue line might be. Shaker sizing calculations are done to make sure all test profiles will fit within the envelope.
Watch and video below and download the Data Physics selection guide to learn more