Computation of Controllability Regions for Unstable Aircraft Dynamics

An active control approach to air vehicle design can significantly expand the flight envelope and improve vehicle performance characteristics. In some cases it can be attained by implementing the aerodynamically unstable configuration or expanding operation at flight regimes with dynamic instability...

Full description

Saved in:
Bibliographic Details
Published in:Journal of guidance, control, and dynamics control, and dynamics, 2004-07, Vol.27 (4), p.647-656
Main Authors: Goman, M. G, Demenkov, M. N
Format: Article
Language:English
Subjects:
Aerodynamics
Aircraft
Algorithms
Applied fluid mechanics
Applied sciences
Closed loop systems
Computer science
control theory
systems
Control theory. Systems
Controllability
Controllers
Eigenvalues
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Linear programming
Optimization techniques
Physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An active control approach to air vehicle design can significantly expand the flight envelope and improve vehicle performance characteristics. In some cases it can be attained by implementing the aerodynamically unstable configuration or expanding operation at flight regimes with dynamic instability, which are then purposely stabilized by the flight control system. An important issue in stabilization of unstable dynamics is connected with the size of the controllability region, which is the set of all states of the aircraft dynamics that can be stabilized by some realizable control action. This region is bounded because of nonlinear actuator constraints, and its size can be considered as a measure for allowable level of external disturbances. In this paper an algorithm based on convex optimization technique is proposed for computation of the controllability region of an unstable linear system under amplitude and rate control constraints. Examples of the controllability region analysis for an aeroservoelastic airfoil system and unstable aircraft dynamics are presented to illustrate the capabilities of the proposed algorithm.
ISSN:0731-5090
1533-3884
DOI:10.2514/1.4038