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Proceedings Paper

Helicopter blade response and aeromechanical stability with a magnetorheological fluid-based lag damper
Author(s): Sameer Marathe; Farhan Gandhi; Kon-Well Wang
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Paper Abstract

This paper explores the feasibility of using Magnetorheological (MR) fluid-based dampers for lag damping augmentation in helicopters. A MR damper model is integrated with a rotor aeromechanical model. Two different control schemes are presented--namely the On-Off scheme and the Feedback Linearization scheme. In the On-Off scheme, two criteria are used to obtain equivalent linear damping for the nonlinear MR damper as a function of the size of perturbation and the applied field. The Feedback Linearization scheme uses a feedback controller to linearize the force output of the MR damper. The two control schemes are compared for lag transient response in ground resonance and their ability to reduce damper load in forward flight. It is shown that a MR damper of a size comparable to an elastomeric damper can provide sufficient damping for ground resonance stabilization and can significantly reduce periodic damper loads with a judicious choice of operation scheme.

Paper Details

Date Published: 27 July 1998
PDF: 12 pages
Proc. SPIE 3329, Smart Structures and Materials 1998: Smart Structures and Integrated Systems, (27 July 1998); doi: 10.1117/12.316908
Show Author Affiliations
Sameer Marathe, The Pennsylvania State Univ. (United States)
Farhan Gandhi, The Pennsylvania State Univ. (United States)
Kon-Well Wang, The Pennsylvania State Univ. (United States)

Published in SPIE Proceedings Vol. 3329:
Smart Structures and Materials 1998: Smart Structures and Integrated Systems
Mark E. Regelbrugge, Editor(s)

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