An adaptive method of helicopter track and balance is introduced to improve the search for the required blade adjustments. In this method, an interval model is used to represent the range of effect of blade adjustments on helicopter vibration, instead of exact values, to cope with the nonlinear and stochastic nature of aircraft vibration. The coefficients of the model are initially defined according to sensitivity coefficients between the blade adjustments and helicopter vibration, to include the ‘a priori’ knowledge of the process. The model coefficients are subsequently transformed into intervals and updated after each tuning iteration to improve the model’s estimation accuracy. The search for the required blade adjustments is performed according to this model by considering the vibration estimates of all of the flight regimes to provide a comprehensive solution for track and balance. The effectiveness of the proposed method is evaluated in simulation using a series of neural networks trained with actual vibration data. The results indicate that the proposed method improves performance according to several criteria representing various aspects of track and balance.
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e-mail: danai@ecs.umass.edu
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June 2005
Technical Papers
Adaptive Method of Helicopter Track and Balance
Shengda Wang,
Shengda Wang
Graduate Research Assistant
Department of Mechanical and Industrial Engineering,
University of Massachusetts
, Amherst, MA 01003-2210
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Kourosh Danai,
Kourosh Danai
Professor
ASME Fellow
Department of Mechanical and Industrial Engineering,
e-mail: danai@ecs.umass.edu
University of Massachusetts
, Amherst, MA 01003-2210
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Mark Wilson
Mark Wilson
Sikorsky Aircraft
, Stratford, CT
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Shengda Wang
Graduate Research Assistant
Department of Mechanical and Industrial Engineering,
University of Massachusetts
, Amherst, MA 01003-2210
Kourosh Danai
Professor
ASME Fellow
Department of Mechanical and Industrial Engineering,
University of Massachusetts
, Amherst, MA 01003-2210e-mail: danai@ecs.umass.edu
Mark Wilson
Sikorsky Aircraft
, Stratford, CTJ. Dyn. Sys., Meas., Control. Jun 2005, 127(2): 275-282 (8 pages)
Published Online: May 2, 2004
Article history
Received:
March 26, 2003
Revised:
May 2, 2004
Citation
Wang, S., Danai, K., and Wilson, M. (May 2, 2004). "Adaptive Method of Helicopter Track and Balance." ASME. J. Dyn. Sys., Meas., Control. June 2005; 127(2): 275–282. https://doi.org/10.1115/1.1913683
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