Experiments on Control of Limit-Cycle Oscillations in a Typical Section

Frampton, Kenneth D.; Clark, Robert L.

doi:10.2514/2.4638

Cited by 32 publications

(19 citation statements)

References 9 publications

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“…And once nonlinear aeroelastic models have reached a state of maturity sufficient for their consideration in the design process, then active and adaptive control can potentially provide for even greater flight vehicle performance. The discussion of active and adaptive control is beyond the scope of this paper, but the reader may wish to consult the work of Heeg [113], Lazarus, et al [114,115], Ko, et al [68][69][70], Block and Strganac [67], Vipperman, et al [116], Bunton and Denegri [8], Clark et al [117], Frampton et al [118], Rule et al [119], Richards et al [120] and Platanitis and Strganac [121].…”

Section: Resultsmentioning

confidence: 99%

Untitled

Dowell

2015

A Modern Course in Aeroelasticity

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Section: Resultsmentioning

confidence: 99%

Untitled

Dowell

2015

A Modern Course in Aeroelasticity

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“…Continuing the work presented in Vipperman et al (1998), Frampton and Clark (1999) investigated experimental active control of a nonlinear aeroelastic system. In Frampton and Clark (1999), system identification and controller design were conducted based upon the linear aeroelastic system as in Vipperman et al (1998), but the authors incorporate a freeplay nonlinearity with active control.…”

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confidence: 99%

“…In Frampton and Clark (1999), system identification and controller design were conducted based upon the linear aeroelastic system as in Vipperman et al (1998), but the authors incorporate a freeplay nonlinearity with active control. With the introduction of freeplay in the flaprestoring moment, the wing section exhibits LCO.…”

mentioning

confidence: 99%

Structured Model Reference Adaptive Control for a Wing Section with Structural Nonlinearity

Strganac

Junkins

et al. 2002

Journal of Vibration and Control

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#DUVTCEV The recently derived structured model reference adaptive control (SMRAC) method is considered for the active suppression of limit cycle oscillations for a typical wing section with a structural nonlinearity. The SMRAC method uses the specific structure of the equations of motion governing general mechanical systems. This adaptive control method is implemented and tested in wind tunnel experiments to validate the performance. For comparison, results obtained with adaptive feedback linearization are also presented. It is shown that the derived SMRAC is advantageous in that it suppresses limit cycle oscillations at higher velocities, and also it can rigorously treat actuator saturation C RTKQTK.-G[ 9QTFU Aeroservoelasticity, control, nonlinear control, adaptive control $!

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“…LCOs have been observed and explained in terms of Hopf bifurcations (Price et al 1995), and the possibility of LCO control and suppression has also been investigated (Mastroddi & Morino 1996;Dimitriadis & Cooper 1999;Frampton & Clark 1999). However, the main subject of all this research has been structural nonlinearities and, to a lesser extent, aerodynamic nonlinearities (Morton & Beran 1999).…”

Section: Introductionmentioning

confidence: 99%

“…Most work on aeroservoelastic systems has consisted generally of case studies, such as Becker & Vaccaro (1995). Frampton & Clark (1999) applied linear active control to a typical section airfoil with nonlinearity in the #ap restoring spring. However, they concentrated on only one type of nonlinearity, namely freeplay.…”

Section: Introductionmentioning

confidence: 99%