Aerospace hardware (i.e., space crafts) require high intensity acoustic level testing, which is usually accomplished inside a RATF (reverberant acoustic test facility). The acoustic noise level inside the RATF at NASA Plum Brook test station can reach 163 dB, which is the highest level among all RATFs around the world.
Read moreSetting SRS Wavelet Parameters
Introduction
The SRS Synthesis test aims to create a time profile shock pulse whose Shock Response Spectrum matches a profile defined by the customer.
Video Capture for Test Monitoring
Video Capture is a new EDM Extension that works with IP cameras for vibration test monitoring and data acquisition. This feature provides real-time video monitoring and video or photo recording of the test process or any object of interest along with data acquisition. The Video Capture feature is available in EDM VCS (vibration control system) and EDM DSA (dynamic signal analysis) software for the Spider platform. Dome or box type IP cameras using the ONVIF protocol are supported by the video capture feature.
Read moreEDM 10.0 Release
Crystal Instruments is excited to announce the release of EDM 10.0, the latest software version for all Spider and CoCo products serving advanced and fundamental industries in addition to furthering academic advancements.
Read moreModal Data Acquisition Using CoCo Testing Plan on CoCo-80X/90X
The Modal Data Acquisition (MDA) function for the CoCo-80X/90 allows users to conveniently acquire modal data in the field. The CoCo Testing Plan provides an overview of the measurement process and also provides the ability to customize the measurement entries.
This article describes a step-by-step process of the CoCo MDA function along with the CoCo Testing Plan feature. A brief overview of transferring the data from the CoCo to EDM Modal in order to post-process the data is also presented.
Read moreEnvironmental Vibration Testing for Micro and Millimeter Wave Components
Recently TelGaAs has modernized its vibe and shock capabilities. With the addition of Spider-81B vibe controller, we can now quickly develop, simulate, execute, and report our vibe & shock profiles.
Read moreModal Analysis of Bullet Train Wheel using EDM Modal
This article examines the acquisition of modal characteristics from a bullet train wheel by performing experimental modal analysis. The wheel vibrations affect the dynamics of the wheel-rail interactions. Understanding these vibration characteristics will help mitigate the vibration and noise at high speeds.
Read moreOregon State University Purchased High Channel Count Spider-80SGi System for Geotechnical Projects
Oregon State University in Corvallis, OR recently purchased a 64-channel Spider-80SGi data acquisition system. Dr. Armin W. Stuedlein, professor of geotechnical engineering said the Spider DAQ will be used for studies on in-situ liquefaction and cyclic softening studies, performance of ground improvements, and testing of full-scale foundations.
Read moreTotal Harmonic Distortion
Total Harmonic Distortion (THD) is a critical specification for signal analyzers and electronic components. This application note will provide a description of harmonics and harmonic distortion that is both brief and comprehensive.
Read moreSAE Noise & Vibration 2021 and 91st SAVE Shock & Vibration Symposium
Trade shows are back and Crystal Instruments is enthusiastically attending. At each show Crystal Instruments highlighted the advantages of working with an innovative manufacturer like ourselves. Contact our team to discuss your project.
Read moreModal Space - In Our Own Little World
Why can’t I run a modal test with one big shaker and just “crank up the signal”?
That isn’t a good idea - Let’s discuss this.
OK – so we need to talk about a few things here. Many times people who get involved in modal testing sometimes come from the “vibration qualification world” and have a completely different mentality compared to the “modal world”.
Read moreNew Crystal Instruments Headquarter Address in Santa Clara, CA
It is our pleasure to announce that Crystal Instruments is expanding our business with a new office location:
Crystal Instruments Corporation
2090 Duane Avenue
Santa Clara, CA 95054
Fall 2021 Conferences and Seminars
Come see our vibration controllers and dynamic signal analyzers in person and learn the benefits of Crystal Instruments test technology aimed at the most challenging testing requirements.
Read moreSpectral Flatness
Spectral flatness is a way to quantify the deviation of a passband from being perfectly flat across the frequency spectrum. Like most specifications, the behavior of signals measured in the passband is not ideal and we want to quantify the deviation from the ideal case.
Read moreModal Analysis of Disc Brake Rotor using EDM Modal
Executing the modal analysis of a structure is crucial in order to analyze the modal parameters of a test object. The natural frequencies, damping and mode shapes of the unit under test provides help to adjust the mechanical properties of a structure by optimizing the design and improving the structural behavior of the test unit. Consequently, modal analysis is a critical part of product development.
Read moreSpider-80Ti Temperature Measurement Video
Watch the new Spider-80Ti video produced by Aakash Umesh Mange, Application Engineer at Crystal Instruments. Narration is provided by Walter Kemphaus, Application Engineer at Crystal Instruments.
The Spider-80Ti is a front-end from the Spider-80Xi hardware platform that enables temperature measurement. Spider-80Ti supports temperature measurements from Thermocouples and RTD (Resistance Temperature Detector) sensors.
Read moreModal Space - In Our Own Little World
Can the test setup have an effect on the measured modal data?
Do the setup boundary conditions and accelerometers have an effect?
Most definitely!!!!! Let's discuss this.
Read moreDaily Acoustic Test and Measurement for 7,000 Laptop Fans with Spider System
A manufacturer of laptop fans was suffering from the results of slow production testing. The testing capacity was limited by testing products with manually operating instruments in a quiet room. Crystal Instruments provided the easy-to-use Spider hardware and EDM software package as a solution to significantly improve their production testing.
Read moreSine Sweep in High Frequency Range
A typical vibration test often requires running the test up to 2000 Hz or beyond. This is a tremendous challenge because the resonant and anti-resonant frequencies are often only a few hundred Hz. This article analyzes the obstacles to running a sine test over a high frequency range, including the dynamic characteristics of the Unit Under Test (UUT) and fixtures, the control dynamic range of the vibration controllers, and the sensor mounting locations. Several strategies and recommendations are then discussed with results.
Read moreCommon-Mode Rejection Ratio
The common-mode rejection ratio (CMRR) specification defines how well a differential amplifier rejects common-mode signals. A common-mode signal is the same (common) to both conductors in a typical two conductor connection (signal conductor and ground conductor).
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