The case described in this article examines the modal characteristics of a satellite model acquired from performing experimental modal analysis. A hammer impact test was carried out with two teardrop uni-axial accelerometers (mounted in different directions) to study the modal behavior. The roving excitation method assists in completely avoiding the potential mass loading side effect produced by a roving response procedure. A hard tip was selected to excite the higher frequency modes.
Read moreDigital Filters & Resampling in Post Analyzer
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.
Read moreSound of Mode Shapes
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.
Read moreHALT Testing of ConnectDER Solar Meter Socket Adapter
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.
Read moreVariance Reduction for Random Vibration Testing
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.
Read moreMIMO SRS Vibration Testing on Dual Shaker Vertical Configuration
MIMO SRS vibration testing is challenging to execute due to stringent hardware and software control requirements.
Read moreData Recording Based on Dual ADC Architecture
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.
Introducing our new distributor, VIBLENS for Spain
See how NASA uses Crystal Instruments data acquisition systems
Click to read: NASA is 'learning to listen to the X-59' by simulating sonic thumps with fighter jets (Image credit: NASA/Carla Thomas)
Read moreMulti-Shaker Push-Push Vibration Test
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.
Read moreUpdated Ground Vibration Testing Video
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.
Read moreMode Shape Characterization
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.
Read moreGround Vibration Testing (GVT) on F-16 Fighter Jets for Greek Air Force
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.
Read moreHappy Holidays and Happy New Year from Crystal Instruments and Sentek Dynamics!
As 2023 ends, CI and Sentek are proud to wish everyone in the test and measurement industry a happy holiday and happy new year. We hope everyone has enjoyed some rest and relaxation with family and friends and are looking forward to a successful 2024!
Read morePickleball paddle noise characterization with CoCo-80X and Post Analyzer, Dec 2023
Pickleball noise is comprised of several interactions, one being the paddle impacting the ball and another being people cheering and shouting. The paddle impact noise is one of the issues the industry has faced, and some paddle manufacturers are claiming quiet noise characteristics of their paddles.
In this opportunity, we used the Crystal Instrument’s CoCo-80X to characterize the noise from several paddles for acoustic comparison. The equipment consisted of three (3) microphones mounted on an arch boom and seven specimens to be tested (including different paddles). The testing was done inside the MD Acoustics, LLC’s anechoic chamber at the facilities in Gilbert, AZ.
Read moreNEW – Patented GPS Time Stamping Technology Available on the CoCo-80X
Crystal Instruments CoCo-80X handheld dynamic signal analyzer allows users to acquire measurements with unparalleled convenience in the field. The rugged design features a compact display for quick, easy, and accurate data recording and analysis. This powerful hardware system is now combined with Crystal Instruments patented GPS time synchronization technology, featuring a time accuracy of 100 ns. Users can now execute Operational Modal Analysis to study the dynamic characteristics of large structures such as bridges and buildings.
Read more