Passive-adaptive vibration absorbers using shape memory alloys

Keith A. Williams; George T.C. Chiu; Robert J. Bernhard

doi:10.1117/12.350738

9 June 1999 Passive-adaptive vibration absorbers using shape memory alloys

Keith A. Williams, George T.C. Chiu, Robert J. Bernhard

Proceedings Volume 3668, Smart Structures and Materials 1999: Smart Structures and Integrated Systems; (1999) https://doi.org/10.1117/12.350738
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

Abstract

The passive-adaptive approach to vibration control shows promise in its ability to combine the robust stability and low-complexity of passive tuned absorbers with the adaptability of active control schemes. Previous tunable vibration absorbers have been complex and bulky. Shape memory alloys (SMA) with their variable material properties, offer an alternative adaptive mechanism. Heating an SMA causes a change in the elastic modulus of the material by a factor as high as three. Incorporating SMA in parallel with traditional spring materials creates an absorber with a variable spring stiffness and a corresponding variable tuning frequency. Using on-off actuation of the SMA, discrete frequencies of tuning are obtained through the use of multiple SMA elements.

Citation Download Citation

Keith A. Williams, George T.C. Chiu, and Robert J. Bernhard "Passive-adaptive vibration absorbers using shape memory alloys", Proc. SPIE 3668, Smart Structures and Materials 1999: Smart Structures and Integrated Systems, (9 June 1999); https://doi.org/10.1117/12.350738

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