Design of a GPS aided guidance, navigation, and control system for trajectory control of an air vehicle

Abstract

The advent of GPS has afforded the aerospace controls engineer a powerful, new means of controlling air vehicles This work explores a new method of designing and implementing controllers and guidance systems for autonomous control of air vehicles utilizing a GPS integrated guidance, navigation and control system. This is a subject of considerable interest when realizing controllers to track reference trajectories given in an inertial reference frame. The design, implementation, and dynamic simulation of a precise tracking trajectory controller for an Unmanned Air Vehicle (UAV) is presented. This design provides a natural conversion of commands and other measured outputs (such as GPS signals) from an inertial reference frame to a body-fixed reference frame. This achieves automatic recruiting of the actuators while preserving the properties of the original design (linearization principle). Trajectory control, GNC, Linear Quadratic regulator, LQR, Kalman filter, Nonlinear simulation, D- Implementation, Bluebird