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Advances in Aircraft and Spacecraft Science
  Volume 4, Number 2, March 2017 , pages 185-202

Model updation using multiple parameters influencing servoelastic response of a flexible aircraft
Prabha Srinivasan and Ashok Joshi

    In a flexible airvehicle, an assessment of the structural coupling levels through analysis and experiments provides structural data for the design of notch filters which are generally utilized in the flight control system to attenuate the flexible response pickup. This is necessitated as during flight, closed loop control actuation driven with flexible response inputs could lead to stability and performance related problems. In the present work, critical parameters influencing servoelastic response have been identified. A sensitivity study has been carried out to assess the extent of influence of each parameter. A multi-parameter tuning approach has been implemented to achieve an enhanced analytical model for improved predictions of aircraft servoelastic response. To illustrate the model updation approach, initial and improved test analysis correlation of lateral servoelastic responses for a generic flexible airvehicle are presented.
Key Words
    servoelastic response; lateral dynamics; sensitivity study; multi-parameter updation
Prabha Srinivasan : Aeronautical Development Agency, PB 1718, Vimanapura Post, Bengaluru 560017, India
Ashok Joshi : Department of Aerospace Engineering, Indian Institute of Technology, Powai, Mumbai 400076, India

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