Integral shaker - Qish
The Qsouces Qish is developed for the 20 to 2000 Hz frequency range. The force level is enough to excite complete vehicles, vehicle bodies, powertrains and drivelines, suspension systems, moderate size aircraft systems, railway bodies, and machinery up to around 5,000 kg. It provides an efficient and accurate solution for measuring structural and vibroacoustic frequency response functions (FRF). And it mounting and suspension system allow the use in narrow spaces in any inclination.
The Qsources integral shaker enables a direct mounting on the test object without external support or the need for alignment. Thanks to the patented internal suspension, the inert mass is dynamically decoupled from the test object and the force is always aligned along the internal stinger axis. This significantly improves the efficiency of testing by eliminating the support and alignment work (and risk) associated with conventional shaker testing.
Features
Extremely compact supporting difficult access zones
Highest force density in the market
Aligned and fully functional in any inclination
Integrated high resolution force sensor without adding coupled mass
In-line high resolution accelerometer module
Patented decoupling self-aligning suspension
Efficient multi-location excitation with adhesive rings
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 3 to 5000 Kg
Extended frequency range 5-2500 Hz**
Core frequency range 25-2000 Hz*
Sine at 25 Hz, force level 56 N peak to peak
Broadband random 8 N RMS force level
Coupled mass 10 gr
Shaker diameter 40 mm
Availability
The Qish 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.
