Digital filters are powerful tools utilized during the data conditioning phase to analyze signals. These filters empower users to augment signal processing capabilities by integrating them with other data conditioning modules, thus generating advanced post-analysis functionalities. Among the primary types of real-time digital filters are the Decimation filter, the FIR (Finite Impulse Response) filter, and the IIR (Infinite Impulse Response) filter.
A violin was suspended on a frame to a imitate free-free boundary condition. Sentek Dynamics’ BT-100M shaker was used to excite a violin at the base of its front panel. Polytec’s PSV500 laser scanner was used to measure and acquire the data from the back panel of the violin. Crystal Instrument’s EDM Modal software processed and analyzed the dataset to provide the modal parameters of the violin.
Crystal Instruments HALT Testing Lab is equipped with two Qualmark chambers (OVS 3.0 Typhoon HALT and OVS 2.5 HALT) and provides highly experienced HALT testing services.
Variance reduction does not alter the core mechanics of the control loop. Instead, it focuses on reducing the variance in the computation of the control PSD. As a result, the resulting control spectrum adheres more rapidly to stringent alarm limits, which proves particularly advantageous for extremely brief test durations.
MIMO SRS vibration testing is challenging to execute due to stringent hardware and software control requirements.
Overview
The technology described in this article was successfully used in the Ground Recorder System to achieve a very high measurement of dynamic range for a recent NASA project. This technology is now integrated into the CoCo-80X portable hardware platform by Crystal Instruments.
Crystal Instruments (CI) is pleased to introduce VIBLENS as our new distributor in Spain for portable analyzers, data acquisition systems, and modal analysis solutions.
Click to read: NASA is 'learning to listen to the X-59' by simulating sonic thumps with fighter jets (Image credit: NASA/Carla Thomas)
Multiple shaker systems are typically used for vibration testing when the unit under test (UUT) is too long or too heavy to test with a single shaker. This approach overcomes the limitations of high drive requirements with a single shaker test. Multiple shaker systems also allow the UUT to be tested in various configurations and directions in the horizontal and vertical orientations.
Ground Vibration Testing (GVT) includes the modal analysis of an aircraft and its sub-assembly components to analyze and detect any changes to their structural properties.
Shaker applications involve the use of many attachments to the shaker’s armature. Head expanders, fixtures, adapters, and devices under test (DUT’s), all attach to the shaker for the testing process. While it is common to simply consider the added mass of these components, their deformation during vibration can also have a significant impact on the vibrations experienced at any certain point of interest.
Ground Vibration Testing (GVT) involves the modal analysis of an aircraft and its sub-assembly components to analyze and detect any changes in their structural properties. Greek Air Forces will analyze the structure of their aircrafts using our complete solution to enhance the operation of their fleet.