High Frequency Shaker - Qhsh
The Qsources high frequency shaker has been developed to perform highly repeatable, high-frequency structural excitation in a minimum of space. It provides excitation, but with extremely low mass and stiffness loading of the test object.
The main shaker body and mass is decoupled from the stinger dynamically by means of internal suspension. This suspension keeps the shaker well aligned in all inclinations and significantly the test-object coupled mass to around 1.5 gr.
A separate extrenal force sensor is not needed because the force sensor is integrated in the shaker body. This enables users to acquire frequency response functions (FRF) accurately. Multiple force-cups can be attached to the test object to enable an efficient roving shaker excitation using one or more driver magnets with integrated force sensors. You can speed up data acquisition by using FRF with multiple shakers in parallel and uncorrelated signals. The shaker can be mounted inside assemblies and measurements can be performed when the test object is reassembled.
Features
Smallest decoupled shaker on the market
Integrated force sensor
Patented decoupling self-aligning suspension
Efficient multi-location excitation with detachable force-cups
Extensive electrical mechanical and thermal protections for easier use
Measurement techniques
Transfer Path Analysis and sub-structuring
Inverse source or load identification
Experimental Modal Analysis
Statistical Energy Analysis and equivalent
Numerical model correlation and improvement
Main characteristics
Typical test-object mass 0.5 to 1000 Kg
Extended frequency range 50-13000 Hz**
Core frequency range 270-8000 Hz*
Broadband random 0.8 N RMS force level
Sine at 150 Hz, 6 N peak to peak force level
Coupled mass 1.5 gr
Shaker diameter 20 mm
Availability
The Qhsh shaker is marketed in cooperation with Siemens under the Simcenter Qsources product line
*What is core frequency range?
If a very high accuracy is essential it is advised to remain within the core frequency range for the typical test-object mass range. This is the range frequency range where the shaker was designed for and also has its highest force level.
**What is extended frequency range?
High accuracy in the extended frequency range is possible on the heavier objects. In some applications on lighter objects, like troubleshooting, fast application on many locations is needed. Or in some applications, like load identification and transfer path analysis, access is only possible with a small shaker. In those cases a lower accuracy or higher risk of error is accepted and the extended frequency range is used.
In all cases a reciprocity verification and two shaker coupling/decoupling verification can be applied to prevent misinterpretation of measurement results.
