PDC controller design for aircraft glide-slope trajectory tracking

Fuzzy control is used for an aircraft glide-path control, as a nonlinear dynamic system. For the construction of a model-based fuzzy controller, the characteristics of the desired landing trajectory are defined, and an equivalent Takagi-Sugeno (T-S) fuzzy flight model is obtained. Using the LQR method, state feedback gains are derived for locally linearized subsystems, and applied in a Parallel Distributed Compensation (PDC) framework, so that the desired landing trajectory could be achieved. Controller is shown to be capable of controlling the nonlinear model in present of wind as a disturbance and control strategy overcomes successfully.