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Large envelope flight control satisfying H-infinity robustness and performance specifications

Blue, P. and Güvenc, L. and Odenthal, D. (2001) Large envelope flight control satisfying H-infinity robustness and performance specifications. American Control Conference, , June 25-27, 2001, 2001-06-25 - 2001-06-27, Arlington, VA, USA.

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Abstract

A method of designing large envelope flight controllers for high performance aircraft is presented. The approach combines the simple two-degree of freedom architecture often referred to as a disturbance observer and recent advances in parameter-space control design techniques to form a new approach for large envelope flight control design. The procedure enables the designer to explicitly define the desired closed-loop dynamics and ensures that the closed-loop is stable and satisfies weighted frequency response magnitude (H-infinity) specifications. The result is a straightforward procedure that enables the design of a robust flight controller that "forces" the closed-loop dynamics to behave like the specified 'desired dynamics' despite disturbances, modeling uncertainties, and variations in aircraft dynamics due to changing flight conditions. The procedure is presented by designing a pitch-rate controller for the F-16 Variable Stability In-Flight Simulator Test Aircraft (VISTA). The controller provides predicted 'Level 1' flying qualities throughout the large design flight envelope, which is demonstrated using both linear simulations and a high fidelity, nonlinear simulation. Finally, the controller is compared to a 7th order and a 10th order linear parameter-varying (i.e. gain-scheduled) controller and found to provide better performance and robustness.

Document Type:Conference or Workshop Item (Paper)
Additional Information:LIDO-Berichtsjahr=2002,
Title:Large envelope flight control satisfying H-infinity robustness and performance specifications
Authors:
AuthorsInstitution or Email of Authors
Blue, P.UNSPECIFIED
Güvenc, L.Istanbul Technical University
Odenthal, D.UNSPECIFIED
Date:2001
Page Range:pp. 1351-1356
Status:Published
Keywords:flight control, disturbance observer, parameter space method, robust control
Event Title:American Control Conference, , June 25-27, 2001
Event Location:Arlington, VA, USA
Event Type:international Conference
Event Dates:2001-06-25 - 2001-06-27
Organizer:Proc. of ACC
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flexible Aircraft (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Robotics and Mechatronics
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:12 Dec 2013 20:02

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