Nonlinear region of attraction analysis for flight control verification and validation

Current practice for flight control validation relies heavily on linear analyses and nonlinear, high-fidelity simulations. This process would be enhanced by the addition of nonlinear analyses of the flight control system. This paper demonstrates the use of region of attraction estimation for studyin...

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Bibliographic Details
Published in:Control engineering practice 2011-04, Vol.19 (4), p.335-345
Main Authors: Chakraborty, Abhijit, Seiler, Peter, Balas, Gary J.
Format: Article
Language:English
Subjects:
Air transportation and traffic
Aircraft
Applied sciences
Attraction
Computer science
control theory
systems
Control system analysis
Control theory. Systems
Decoupling
Exact sciences and technology
Flight control
Ground, air and sea transportation, marine construction
NASA
Nonlinear analysis
Nonlinear dynamics
Nonlinearity
Optimization
Region of attraction
Transport
Validation and verification
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Summary:Current practice for flight control validation relies heavily on linear analyses and nonlinear, high-fidelity simulations. This process would be enhanced by the addition of nonlinear analyses of the flight control system. This paper demonstrates the use of region of attraction estimation for studying nonlinear effects. A nonlinear polynomial model is constructed for the longitudinal dynamics of NASA's Generic Transport Model aircraft. A polynomial model for the short period dynamics is obtained by decoupling this mode from the nonlinear longitudinal model. Polynomial optimization techniques are applied to estimate region of attractions around trim conditions. ► The research work enhances the validation and verification of flight control systems. ► The work has estimated stability region of polynomial aircraft dynamics. ► Methodical polynomial modeling of aircrafts' dynamics have been proposed in this work.
ISSN:0967-0661
1873-6939
DOI:10.1016/j.conengprac.2010.12.001