Robust Stabilization of Oblique Wing Aircraft Model Using PID Controller

The paper is focused on computation of all possible robustly stabilizing Proportional-Integral- Derivative (PID) controllers for oblique wing aircraft modelled as interval system. The main idea of the proposed method is based on Tan’s technique for calculation of (nominally) stabilizing PI and PID controllers or robustly stabilizing PI controllers by means of plotting the stability boundary locus in either P-I plane or P-I-D space. Refinement of the existing method by consideration of 16 segment plants instead of 16 Kharitonov plants provides an elegant and efficient tool for finding all robustly stabilizing PID controllers for an interval system.