Quaternion-Based Fuzzy Attitude Regulation of a Rigid Spacecraft

The main problem addressed was the quaternion-based, attitude regulation of a rigid spacecraft in the presence of external disturbances. A model-based fuzzy attitude control scheme was presented. The parallel distributed compensation was employed to arrive at a controller that guaranteed the stability of closed-loop system and performance specifications in terms of constraints on input and disturbance rejection. Both the stability and control performance were incorporated in the linear matrix inequality (LMI) conditions. The feedback gains were obtained by the convex optimization technique based on LMI. Simulation results demonstrate that the proposed control scheme is efficient