Gorbatyuk O. Synthesis of Stability and Control Augmentation Systems for Piloted Helicopters and Rotorcraft-Based Unmanned Aerial Vehicles at Uncertainties

The thesis is devoted to piloted helicopters and rotorcraft-based unmanned aerial vehicles stabilization in the hovering mode and exogenous disturbances suppression which affect flying vehicles in real conditions independently of disturbances' character and spectral properties via multivariable stability and control augmentation systems (SCAS) synthesis. Methodology, corresponding algorithmic descriptions and software for SCAS design are introduced. They are based on static output feedback design via LMI method, dynamic output feedback design via Hinf-optimization technology and feedforward-feedback SCAS design, which provides both output feedback and feedforward control on the basis of exogenous disturbances estimation. Obtained results of SCAS design and simulation demonstrate more efficient suppression of bounded input-bounded output exogenous disturbances suppression via feedforward controller application both with the feedback one. Key words: helicopter, rotorcraft-based unmanned aerial vehicle, hovering mode, stability and control augmentation system, linear matrix inequality, optimization, feedback-feedforward control system