Light weight shaker - Qlws
The Qsources Qlws is a self-suspending, self-aligning dynamic decoupled electromagnetic shaker, specifically developed to carry out consistent repeatable structural excitation in a limited space. The unique decoupling suspension solution is patent protected and allows high force density with minimal mass and stiffness loading on the test device.
The Qlws has a market-unique broad frequency range up to 13000 Hz with a nearly constant force level.
The force sensor has been integrated in the shaker allowing consistent and accurate frequency response function acquisition. The shaker detachable force cups can be placed and fixed onto the test object at multiple locations, which provides the possibility for fast data acquisition and a highly efficient manner of working.
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
Shaker diameter 20 mm
Typical test-object mass 0.5 to 1000 Kg
Extended frequency range 50-13000 Hz**
Core frequency range 270-8000 Hz*
Coupled mass 1.5 gr
Broadband random 0.8 N RMS force level
Sine at 150 Hz, 6 N peak to peak force level
Availability
The Qsources Qlws shakers are marketed in co-operation with Polytec and Head Acoustics
*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.
