A magnetorheological elastomer (MRE) shock and vibration isolation mount with a semi-active control system was designed, built and tested. The stiffness of the MRE mount can be increased or decreased with respect to a fail-safe stiffness value, based on the control system feedback for effective shock and vibration mitigation. The 12.7mm (0.5") thick MREs of the mount were specifically formulated to achieve a fail-safe static stiffness of the system equal to the legacy mount to be replaced. The magnetic circuit of the mount was designed and optimized using three-dimensional electromagnetic finite element analysis. A control algorithm was developed that detects and differentiates between both shock and vibration events to adjust the MRE mount stiffness properties accordingly to mitigate the event. The control algorithm was developed, incorporated with hardware and tested for functionality. The shock and vibration mitigation performance of the MRE mount with control system was examined via an experimental study. It was demonstrated that the MRE mount and control system mitigates up to 15g shock and 25 Hz vibration events for weights up to 550 lbs attached to the mount. The mount was also tested under various atmospheric conditions (temperature, pressure, relative humidity, water submergence), and no variation in performance of the MRE mount was observed.
Barkan M. Kavlicoglu, Michael McKee, Huseyin Sahin, and Yanming Liu, "A large-scale, two-way controllable magnetorheological elastomer shock and vibration mitigating mount (Conference Presentation)," Proc. SPIE 10595, Active and Passive Smart Structures and Integrated Systems XII, 1059530 (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 09, 2018; Published: 3 April 2018); https://doi.org/10.1117/12.2297658.5763075045001.
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