Feasibility assessment and design of micro hydraulic solid-state transducers
Name
46603665-MIT.pdf
Description
Full printable version
Size
14.18 MB
Format
Adobe PDF
Checksum (MD5)
856208ce68b84671e15ebadb0c92a809
Author(s)
Pulitzer, Seward Webb, 1974-
Advisor(s)
Nesbitt W. Hagood, IV.
Date Issued
1998
Publisher
Massachusetts Institute of Technology
Abstract
The performance of a number of mechanical applications could be greatly improved by the introduction of transducers that are capable of exploiting the inherent power densities of piezoelectric materials. The ability of these solid-state materials to exert large forces at high frequencies engenders them with specific power levels (mass normalized) that are often several orders of magnitude greater than conventional transducers, but their utility is offset by their small achievable strains. A novel concept for a device capable of improved solid-state transduction, Micro Hydraulic Solid-State Transducers (MHSTs), is introduced and explored in this thesis. The concept is comprised of two core principles: ( 1) utilization of a hydraulic system consisting of a pump, valves, and a working fluid to rectify the high frequency reciprocations of a piezoelectric drive element into unidirectional motion, and (2) performance enhancement through miniaturization. The goal is a transducer possessing high power densities that is useful in conventional applications. Feasibility of the MHST concept is evaluated by designing, modeling, and simulating a prototype mechanism. The effects of miniattariza~ion on device performance are investigated and an optimal scale is determined. Concept feasibility is based on predicted system performance, existing issues, and manufacturing constraints. It is concluded that the concept is feasible and warrants further development.
Description
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
Includes bibliographical references (p. 179-184).
Subjects
Mechanical Engineering.
Sloan School of Management.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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