Application on system identification techniques to Tejas flight test data

Singh, Jatinder and Saraf, Amitabh and Patel, Vijay V and Basappa, - and Tharewal, Sachin (2011) Application on system identification techniques to Tejas flight test data. In: Symposium on Applied Aerodynamics and Design of Aerospace Vehicle (SAROD 2011), November 16-18, 2011, Bangalore, India.

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Tejas, the Indian Light Combat aircraft, is a fly-by-wire aircraft with relaxed longitudinal stability that provides for enhanced agility, high maneuverability and performance. The aircraft is presently undergoing extensive flight test trails and the flight data gathered is being used by various design groups to evaluate aircraft systems, performance and aerodynamic characteristics. This paper gives an overview of the application of system identification techniques to Tejas flight test data for validation and update of the aircraft aerodynamic database. The aerodynamic characterization is carried out using two different approaches i) point model identification, and ii) coefficient level matching. Typical results are presented from both the approaches along with the time history plots from the flight updated aero database. The main purpose of this paper is show to how system identification techniques can lead to accurate determination of aerodynamic characteristics from flight test data.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Flight testing, Flight data, Parameter identification, Aerodynamic database, Mathematical model
Subjects: ENGINEERING > Engineering (General)
Depositing User: Smt Bhagya Rekha KA
Date Deposited: 18 Jan 2012 10:30
Last Modified: 27 Aug 2015 06:37

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