Date of Award

12-1992

Document Type

Thesis

Degree Name

Master of Science

Department

Department of Aeronautics and Astronautics

First Advisor

Bradley S. Liebst, PhD

Abstract

An experimental investigation was performed controlling a cantilevered beam in bending using proportional feedback on a blend of collocated and non-collocated sensor measurements using a single actuator. Exact transfer functions between the control input and the measurements were developed and compared to the finite element method. By analyzing the open loop pole-zero locations as a function of the measurement blending, insight into the closed loop behavior is obtained. Minimum phase behavior can be maintained for a range of the blending ratio. Results using blended control were compared to both proportional collocated feedback and compensated collocated feedback using LQG methods. The comparison was then extended to a theoretical investigation using the blended measurements on a free-free torsional model analogous to a gimbal. Advantages and limitations of using blended measurements are presented.

AFIT Designator

AFIT-GA-ENY-92D-07

DTIC Accession Number

ADA258823

Comments

The author's Vita page is omitted.

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