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Dissertation/Thesis Abstract

An optimal open/closed-loop control method with application to a pre-stressed thin duralumin plate
by Nadimpalli, Sruthi Raju, M.S., California State University, Long Beach, 2010, 155; 1490319
Abstract (Summary)

The excessive vibrations of a pre-stressed duralumin plate, suppressed by a combination of open-loop and closed-loop controls, also known as open/closed-loop control, is studied in this thesis. The two primary steps involved in this process are: Step (I) with an assumption that the closed-loop control law is proportional, obtain the optimal open-loop control by direct minimization of the performance measure consisting of energy at terminal time and a penalty on open-loop control force via calculus of variations. If the performance measure also involves a penalty on closed-loop control effort then a Fourier based method is utilized. Step (II) the energy at terminal time is minimized numerically to obtain optimal values of feedback gains. The optimal closed-loop control gains obtained are used to describe the displacement and the velocity of open-loop, closed-loop and open/closed-loop controlled duralumin plate.

Indexing (document details)
Advisor: Esfandiari, Ramin S.
School: California State University, Long Beach
School Location: United States -- California
Source: MAI 49/04M, Masters Abstracts International
Subjects: Education Policy, Aerospace engineering, Electrical engineering
Publication Number: 1490319
ISBN: 978-1-124-54606-3
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