Award Date

1-1-2005

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Electrical and Computer Engineering

First Committee Member

Sahjendra N. Singh

Number of Pages

80

Abstract

The aim of this thesis is to develop efficient control algorithms for the control of a smart projectile fin in the presence of parameter uncertainties and aerodynamic disturbance inputs. The fin can be used to maneuver small aerial vehicles by controlling its rotation angle. The smart fin considered in this thesis consists of a hollow rigid body (or canard) within which a flexible cantilever beam with a piezoelectric active layer is mounted. The beam deforms when voltage is applied to the piezoelectric layer. The rotation angle of the fin is controlled by deforming the flexible beam which is hinged at the tip of the rigid fin. In this thesis, four kinds of fin control systems based on adaptive control and variable structure theory are done. It is assumed that the fin-beam model parameters and the aerodynamic forces are unknown to the designer. For this study, a finite dimensional state variable model of the fin-beam system obtained by a finite element method is used; Simulation results using the designed control systems are presented. The results show that, in the closed-loop system, asymptotic trajectory tracking of the fin angle is accomplished, in spite of large uncertainties in the system and presence of aerodynamic moment. (Abstract shortened by UMI.).

Keywords

Actuation; Adaptive; Control; Fin; Piezoelectric; Projectile; Smart; Structure; Variable

Controlled Subject

Aerospace engineering; Mechanical engineering

File Format

pdf

File Size

1802.24 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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