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 (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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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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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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Two somewhat arbitrary types of excitation signals are Pseudo Random and Periodic Random. The characteristics of these two signal types will be discussed in detail here. The results of using these excitation types will be compared to the more popular Pure Random and Burst Random types. It will be shown that the cost of additional testing time is well worth the superior estimation of MIMO FRF signals.
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Sentek Dynamics utilizes Crystal Instruments’ Random Vibration Testing System to address the 6-Amazon.com testing requirements. Contract environmental testing services are provided at our testing facility in Charlotte, North Carolina. The THV Environmental Testing system provides one comprehensive testing report for the user’s convenience. Consult with a Sentek Dynamics representative to discuss the right solution for your needs.
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