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Nonlinear state feedback control design to eliminate subcritical limit cycle oscillations in aeroelastic systems

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Abstract

A strictly nonlinear state feedback control law is designed for an aeroelastic system to eliminate subcritical limit cycle oscillations. Numerical continuation techniques and harmonic balance methods are employed to generate analytical estimates of limit cycle oscillation commencement velocity and its sensitivity with respect to the introduced control parameters. The obtained estimates are used in a multiobjective optimization framework to generate optimal control parameters which maximize the limit cycle oscillation commencement velocity while minimizing the control cost. Numerical simulations are used to show that the assumed nonlinear state feedback law with the optimal control parameters successfully eliminates any existing subcritical limit cycle oscillations by converting it to supercritical limit cycle oscillations, thereby guaranteeing safe operation of the system in its flight envelope.

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Authors and Affiliations

  1. Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24060, USA

    Himanshu Shukla & Mayuresh J. Patil

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  1. Himanshu Shukla
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  2. Mayuresh J. Patil
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Correspondence to Himanshu Shukla.

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Shukla, H., Patil, M.J. Nonlinear state feedback control design to eliminate subcritical limit cycle oscillations in aeroelastic systems. Nonlinear Dyn 88, 1599–1614 (2017). https://doi.org/10.1007/s11071-017-3332-5

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