Aerodynamic Angle Estimation of a Fighter Aircraft Under Highly Maneuverable Conditions Without GPS

This paper presents a modified complementary filter based sensor fusion technique aims to filter out the effects of wake, turbulence and high g maneuvers turns while maintaining good bandwidth of airdata. The proposed technique uses inertial and airdata sensors for estimating aerodynamic angle with no reliance on GPS. Unreliable AoA and AoSS data during rapid change in dynamics can affect the stability & control of the aircraft, especially in critical maneuvers. A proposed technique was evaluated for wake and high-g maneuver flight data of a high-performance aircraft. Results are compared with GPS and proposed technique found to generate comparable results.