Satellite / Magnetometer Combination Of Dynamic Directional Attitude Determination System

The Global Positioning System (GPS) is poised to revolutionize flight vehicle Guidance, navigation, and Control. The technology of determining attitude of carrier by GPS carrier phase measurements is becoming a particle of navigation fields because of its high precision and its freedom from the constraints of Precise Code (or Y code) by the U.S.. Real-time attitude determination is derived from extremely precise differential carrier phase measurements among multiple GPS antennas mounted on a flight vehicle.The magnetometer is an attitude sensor, it can provide three dimensional angle data: yaw angle, pitch angle and roll angle, and it can be widely applied in need to gain the posture angle data of the platform (or carrier). In recent years, the electronic magnetometer is wide applicated by its high performance-to-price ratio in the movement carrier (for example steamboat, automobile, train), in many fields, the electronic magnetometer has manifested the high application value.Although GPS and magnetometer all have a good application in attitude determination, but they all have their own shortcomings: The GPS has a low turnover rate of its information, and is easy to be influenced by the environment, sometimes cannot provide continual, sophisticated, reliable navigation information, cannot guarantee the secure request of the navigation; the magnetometer is easy to be influenced by the magnetic field undulation of the environment. In view of the respective characteristic of the GPS and the magnetometer, this dissertation attempts to combinate the system of GPS attitude determination and the magnetometer.In allusion to the characteristic that the yaw data of the magnetometer may fall under but the pitch data and roll data don't fall under when the environment has a magnetic field undulation, this dissertation attempts to adjust the yaw data, and carries on the experiment to confirm; put the adjusted posture angle information into the pyramid algorithm based on attitude constraints, and carries on the experiment to confirm.This dissertation combinate the system of GPS attitude determination and the magnetometer by the method above.It not only has made up the respective insufficiency, but also enhanced the system overall performance.