Title page for ETD etd-12042009-020103
|Type of Document
||Ackerman, Anthony E.
||Dynamic transduction characterization of magnetostrictive actuators
||Master of Science
|Rogers, Craig A.
|Robertshaw, Harry H.
- Magnetostrictive transducers.
|Date of Defense
The objective of this thesis is to develop an analysis approach for formulation of
transduction or input/output representations for magnetostrictive actuators. This
transduction model is developed through application of an electro-magneto-mechanical
impedance modeling approach which combines both the mechanical dynamics and
coupled behavior of the actuator device. Lumped and continuous mechanical impedance
elements model the actuator dynamics and the constitutive relationships for Terfenol-D
characterize the electro-magneto-mechanical interaction. Experimental analysis of a
Terfenol-D actuator serves to verify the developed models and provides an indication of
The developed transduction model allows for various device behavior analysis including
dissipative power consumption, force and stroke output, and efficiency as a transducer.
An actuator design strategy based upon the dynamics of the actuator and a driven external
system is presented and allows for analysis of various actuator behaviors in terms of
device parameters. The Terfenol-D actuator as a collocated actuator/sensor is also made
possible with the transduction model.
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