SDRE and LQR Controls Comparison Applied in High-Performance Aircraft in a Longitudinal Flight

This paper presents the design of LQR (Linear Quadratic Regulator) and SDRE (State-Dependent Riccati Equation) controllers for flight control F-8 Crusader aircraft considering nonlinear model longitudinal movement aircraft. Numerical results analysis demonstrate that designed can lead to significant improvements in aircraft's performance, ensuring stability a large range attack angle situations. When applied conditions with an above stall situation influenced by gust model, it was demonstrated were able smooth response maintaining balance up 56% angle. However, even more difficult situations, angles 76% angle, only controller proved be efficient reliable recovering its stable configuration.