Active flutter suppression using dipole filters

Srinathkumar, S and Waszak, Martin R (1992) Active flutter suppression using dipole filters. Technical Report. National Aeronautical Laboratories, Bangalore, India.

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Abstract

By using traditional control concepts of gain root locus, the active suppression of a flutter mode of a flexible wing is examined. It is shown that the attraction of the unstable mode towards a critical system zero determines the degree to which the flutter mode can be stabilized. For control situations where the critical zero is adversely placed in the complex plane, a novel compensation scheme called a 'Dipole' filter is proposed. This filter ensures that the flutter mode is stabilized with acceptable control energy. The control strategy is illustrated by designing flutter suppression laws for an active flexible wing (AFW) wind-tunnel model, where minimal control effort solutions are mandated by control rate saturation problems caused by wind-tunnel turbulence.

Item Type: Proj.Doc/Technical Report (Technical Report)
Uncontrolled Keywords: Active control;Aeroelasticity;Control systems design;Flexible wings;Flutter;Vibration damping;Filters;Turbulence;Wind tunnel models
Subjects: AERONAUTICS > Aircraft Stability and Control
Division/Department: Flight Mechanics and Control Division, Other
Depositing User: M/S ICAST NAL
Date Deposited: 15 Apr 2008
Last Modified: 24 May 2010 09:55
URI: http://nal-ir.nal.res.in/id/eprint/4448

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