Feedback linearization and adaptive control of a nonlinear aeroelastic system

In this thesis, it is exhibited that although, the aeroelastic system is not input-state feedback linearizable, a partial linearized representation of the system in dimension three can be obtained. Based on this partially linearized representation, a new inverse controller was derived and simulation results show that control of pitch angle and plunge displacement can be accomplished; Then, adaptive output feedback control law is examined. For the synthesis of the controller, it is assumed that only pitch angle and plunge displacement are measured. A canonical state variable representation of the system is derived for the reconstruction of the state variable. According to the new state variable form of the aeroelastic system, filters are designed and an estimate of states are constructed using a linear combination of the states of the filters. Based on a backstepping design technique, adaptive control laws for the control of pitch angle and plunge displacement are derived. Simulation results are presented to show the adaptive state regulation capability of the control system. Finally, reduced order filters are designed to obtain the unmeasured state variables and new adaptive control laws are obtained. In the close-loop system, the state vector is shown to converge asymptotically to zero.

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Electrical Engineering

Grantor dc:publisher

University of Nevada, Las Vegas

Year

1999

Author dc:creator

• Xing, WenHong

Contributors dc:contributor

• Sahjendra N. Singh

Statement dc:rights

• IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/

Language dc:language

English

Identifier

https://oasis.library.unlv.edu/rtds/1014

OAI identifier oai:identifier

oai:oasis.library.unlv.edu:rtds-2013