Longitudinal control system design is considered for a linearized dynamic model of a supersonic transport aircraft concept characterized by relaxed static stability and significant aeroelastic interactions. Two LQG-type controllers are designed using the frequency-domain additive uncertainty formulation to ensure robustness to unmodeled flexible modes. The first controller is based on a 4th-order model containing only the rigid-body modes, while the second controller is based on an 8th-order model that additionally includes the two most prominent flexible modes. The performance obtainable from the 4th-order controller is not adequate, while the 8th-order controller is found to provide better performance. Frequency-domain and time-domain (Lyapunov) methods are subsequently used to assess the robustness of the 8th-order controller to parametric uncertainties in the design model.
Longitudinal Control of High Speed Aircraft in the Presence of Aeroelastic Modes
1996
30 pages
Report
Keine Angabe
Englisch
Aeronautics , Aeroelasticity , Aircraft control , Control systems design , Dynamic models , Flight control , Longitudinal control , Mathematical models , Supersonic transports , Transport aircraft , Aircraft design , Controllers , Delta wings , Flexibility , Frequency response , Liapunov functions , Linearization , Robustness (Mathematics) , Static stability
Aeroelastic problems of high speed aircraft
TIBKAT | 1964
|Study of bending-torsion aeroelastic modes for aircraft wings
Engineering Index Backfile | 1949
|Longitudinal control system for high-speed aircraft
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|LONGITUDINAL CONTROL SYSTEM FOR HIGH-SPEED AIRCRAFT
SAE Technical Papers | 1948
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