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Title: Enhanced eigenstructure assignment for aeroelastic control application
Language: English
Authors: Merkel, Maximilian 
Gojny, Marcus Heinrich 
Carl, Udo B. 
Keywords: Flexible aircraft;aeroservoelasticity;structural vibrations;flutter margin;damping augmentation;robust controller design
Issue Date: 2002
Source: Deutscher Luft- und Raumfahrtkongress 2002, Stuttgart, 23.-26. September 2002, DGLR-2002-007
Abstract (english): 
Regarding the regulation of weakly damped aeroelastic structures by means of the primary flight controls (PFC), the present contribution focusses on a sophisticated robust controller design method, to achieve the required functionality. Generally, the outlined approach is premised on eigenstructure assignment. Enhancements promise effective integration of miscellaneous potentially competing objective specifications either in time or frequency domain as well as parametric requirements. Due to the infinitive set of flight conditions and fuel configurations the underlying aeroservoelastic plant consists of a linear multivariable multi–model system. Technical feasibility, parametric and dynamic uncertainties as well as architectural constraints, e.g. the number of available sensors lead to a robust output feedback controller. Principally the proposed method is well known from flight control design and modal decoupling. But in contrast, the constrained simultaneous robust eigenvalue stabilisation represents the primary objective at the current application. Since the intrinsic controller calculation is implemented as multiobjective optimisation task, proper optimisation criteria are defined, which incorporate the aeroservoelastic performance specifications into the design procedure. The suitability of the resulting low–order static output controller is verified by real time simulation for a completely normal and degraded configuration covering a real PFC actuation system hardware–in–the–

DOI: 10.15480/882.222
Institute: Flugzeug-Systemtechnik M-7 
Document Type: Chapter/Article (Proceedings)
License: In Copyright In Copyright
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