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Advances in Aircraft and Spacecraft Science Volume 4, Number 2, March 2017 , pages 185-202 DOI: https://doi.org/10.12989/aas.2017.4.2.185 |
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Model updation using multiple parameters influencing servoelastic response of a flexible aircraft |
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Prabha Srinivasan and Ashok Joshi
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| Abstract | ||
| 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 | ||
| Address | ||
| 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 | ||
