Smart Battery Pack Testing with EDM
A battery pack has an enclosure to protect battery cells from external hazards, such as external forces and moisture. An internal cooling system and Battery Management System (BMS) provides a protected environment for the cells to perform in.
While performing vibration or THV (temperature/humidity/vibration) tests on a battery pack, accelerometers, temperature, and humidity sensors can measure the external environment of the battery pack. The BMS monitors the status of internal battery pack and communicates with external components via CAN bus.
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Vibration Testing Fully Connected Cars
Vibration testing of automotive components helps manufacturers ensure both a sound design and improved reliability. The current growing demand for electric vehicles has placed battery testing into the spotlight and as a result, attention for vibration tests of electric vehicle batteries has increased.
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Swept Sine Test Measurement Strategy
A Swept Sine test is a type of vibration test where the controller excites one specific frequency via sinusoidal voltage drive. As opposed to a Random test, where a broadband of frequencies is excited together like white noise, the Swept Sine test produces a response with energy in the primary frequency and its harmonics (i.e., frequencies that are multiples of the primary frequency).
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Modal Testing with Shaker Excitation – What are some of the issues to consider? Webinar featuring Dr. Peter Avitabile
Join Crystal Instruments for a free webinar on March 29, 2021 at 8:00 am PDT featuring lead instructor Dr. Peter Avitabile, PE, University of Massachusetts Lowell.
Register online
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Visualizing the Orbit Trace of a Three-axis Shaker
This section describes the orbit plot feature in the vibration visualization function. In-depth details about the workflow of the vibration visualization process will be discussed in the later portion of the article. The orbit plot is not only used to understand the magnitude of the vibration during a vibration test but also to observe the phase relationship between the different channels used to acquire the response of the unit under test. This is understood more clearly using a test case.
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New Vibration Utilities Mobile App
Crystal Instruments is excited to announce the launch of the Vibration Utilities app, available on both iOS and Android. Use the app to help with unit conversions as well as shaker sizing calculations for your Random, Sine or Shock profiles.
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Minimum Energy Option in MIMO Random
The Minimum Energy option of MIMO Random is implemented to handle the nonlinearity of a multi-shaker table and provide fast convergent control.
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Operational Modal Analysis of Scaled Building Structure using EDM Modal
Operational Modal Analysis (OMA) is commonly used to monitor and evaluate the health of building structures to investigate for any damage [1]. Studying the modal parameters of the structure can assist in observing changes in the dynamic properties which can further help in predicting error in certain elements which might need some repair or modification.
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Comparison of Multi-Resolution Spectrum Technology and Regular FFT in Modal Analysis
A modal test is carried out to examine data obtained through regular FFT technology and MR technology to quantify the modal results, such as damping, FRF amplitude, Auto-MAC chart, and mode shapes.
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Tesla, Inc. selects Sentek Dynamics E20064A water-cooled shaker for mechanical vibration testing of high performance electric sports cars.
Sentek Dynamics and Crystal Instruments successfully installed a massive shaker at Tesla, Inc. in Fremont, California, USA. This is the first large scale system of its kind for mechanical vibration and shock testing, featuring a payload of over 4400 lbs and dimensions of 87 inches x 86 inches x 32 inches.
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