Force Measurement Device
General Description
The Force Measurement Device (FMD) is a versatile assembly of high performance/high stiffness, pre-loaded force links, installed in the load path between the shaker and specimen interface during vibration testing. It generates the 3 global interface forces and the 3 interface moments using a transformation matrix that is based on the individual force signals and the specific position of the individual force links w.r.t. a reference point.
The FMD global output signals can be used to directly control in real-time the test item interface forces and moments, thus enabling force limited vibration testing.
Each individual force link provides the local forces in three orthogonal directions and is geometry controlled in terms of height, flatness and parallelism in order to ensure proper load transfer.
The top side interface flatness of force link assemblies is controlled through shimming. In total up to 24 tri-axial force-links can be combined to support various standard interfaces as well as customized test setups.
Standard configurations with 12, 16 and 24 force links are available, covering the most common launcher interfaces and providing a 80x80mm M10 insert pattern for test article fixation.
A full model of the FMD is available for numerical simulations, such as coupled load analysis.
TECHNICAL PARAMETERS
Description
Value
Lateral Force
360 kN(*)
Vertical Force
1.800 kN(*)
Overtuning Moment
489 kNm
Torsional Moment
919 kNm
Usable Frequency range
3 – 200 Hz
(*) Indicates Values in a configuration of a circular 24x loadcell setup with 2554 mm diameter.