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Experimental Amplitude-Dependent Characterization of the TiltRotor Aeroelastic Stability Testbed.

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Title: Experimental Amplitude-Dependent Characterization of the TiltRotor Aeroelastic Stability Testbed.
Authors: Simmons, Gray1, Kreshock, Andrew R.2, Thornburgh, Robert P.2, Sekula, Martin K.3, Riso, Cristina4 criso@gatech.edu
Source: Journal of the American Helicopter Society. Apr2026, Vol. 71 Issue 2, p1-19. 19p.
Subjects: Vibration tests, Aerodynamic stability, Rotors (Helicopters), Rotor dynamics, Wind tunnel testing, Nonlinear mechanics
Abstract: This paper investigates the amplitude-dependent characteristics of the TiltRotor Aeroelastic Stability Testbed. The recovery rate, multiple decay Prony averaging, and Stockwell transform methods are employed to account for system nonlinearities, which are neglected by conventional test data analysis methods based on linear assumptions. A comprehensive study of ground vibration and wind tunnel test data highlights reduced local damping and frequency at larger response amplitudes for various blade materials, rotor speeds, and pitch--flap coupling parameters. This study demonstrates novel analysis capabilities to investigate nonlinear dynamics in tiltrotors and support their design. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the American Helicopter Society is the property of American Helicopter Society dba Vertical Flight Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 193895971
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  Data: Experimental Amplitude-Dependent Characterization of the TiltRotor Aeroelastic Stability Testbed.
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  Data: <searchLink fieldCode="AR" term="%22Simmons%2C+Gray%22">Simmons, Gray</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kreshock%2C+Andrew+R%2E%22">Kreshock, Andrew R.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Thornburgh%2C+Robert+P%2E%22">Thornburgh, Robert P.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Sekula%2C+Martin+K%2E%22">Sekula, Martin K.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Riso%2C+Cristina%22">Riso, Cristina</searchLink><relatesTo>4</relatesTo><i> criso@gatech.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+American+Helicopter+Society%22">Journal of the American Helicopter Society</searchLink>. Apr2026, Vol. 71 Issue 2, p1-19. 19p.
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  Data: <searchLink fieldCode="DE" term="%22Vibration+tests%22">Vibration tests</searchLink><br /><searchLink fieldCode="DE" term="%22Aerodynamic+stability%22">Aerodynamic stability</searchLink><br /><searchLink fieldCode="DE" term="%22Rotors+%28Helicopters%29%22">Rotors (Helicopters)</searchLink><br /><searchLink fieldCode="DE" term="%22Rotor+dynamics%22">Rotor dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Wind+tunnel+testing%22">Wind tunnel testing</searchLink><br /><searchLink fieldCode="DE" term="%22Nonlinear+mechanics%22">Nonlinear mechanics</searchLink>
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  Label: Abstract
  Group: Ab
  Data: This paper investigates the amplitude-dependent characteristics of the TiltRotor Aeroelastic Stability Testbed. The recovery rate, multiple decay Prony averaging, and Stockwell transform methods are employed to account for system nonlinearities, which are neglected by conventional test data analysis methods based on linear assumptions. A comprehensive study of ground vibration and wind tunnel test data highlights reduced local damping and frequency at larger response amplitudes for various blade materials, rotor speeds, and pitch--flap coupling parameters. This study demonstrates novel analysis capabilities to investigate nonlinear dynamics in tiltrotors and support their design. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of the American Helicopter Society is the property of American Helicopter Society dba Vertical Flight Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.4050/JAHS.71.022006
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      – Code: eng
        Text: English
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        PageCount: 19
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        Type: general
      – SubjectFull: Aerodynamic stability
        Type: general
      – SubjectFull: Rotors (Helicopters)
        Type: general
      – SubjectFull: Rotor dynamics
        Type: general
      – SubjectFull: Wind tunnel testing
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      – SubjectFull: Nonlinear mechanics
        Type: general
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      – TitleFull: Experimental Amplitude-Dependent Characterization of the TiltRotor Aeroelastic Stability Testbed.
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            NameFull: Thornburgh, Robert P.
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            NameFull: Sekula, Martin K.
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            NameFull: Riso, Cristina
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              M: 04
              Text: Apr2026
              Type: published
              Y: 2026
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