Based On Gps-uav Automatic Landing Control System Design And Implementation

Keeping pace with the latest progress trend in the UAV automatic take-off and landing technology, this dissertation built corresponding mathematic model and system simulation platform using MATLAB/Simulink/Stateflow simulation tools. Such pivotal techniques as UAV exact approach and landing guidance control, building and analyzing ground taxiing model, ground taxiing integrated control, landing trajectory following and engine integration control are investigated. The main contributions are as follows:1. The principles of diversified DGPS are analyzed and compared firstly, and DGPS error models are built according to different type of error.2. After the UAV nonlinear model is built with aerodynamic parameters, the linear model is implemented built by small disturbance equation. Because take-off and landing include ground sliding part, UAV ground sliding model is built by corresponding reference.3. The longitudinal and lateral control laws of landing are designed separately. They include the glide track following system,the quartic curve leveling control system and the lateral deflection correcting system. DGPS provides guidance signals of system. The longitudinal and lateral control laws of UAV ground sliding are designed separately using pitch angle control , yaw angle control , braking rear-wheel and driving front-wheel. Finally, the robustness of the designed control system to the atmospheric turbulence is verified by simulation using MATLAB/SIMULINK.4. The UAV ground sliding and climbing control system are designed in this dissertation. The control laws of system are designed using classical control method.A scheme for automatic take-off and landing control systems is obtained in this dissertation. The simulation results show that the designed control system is satisfying. And it is beneficial to the development of the future take-off and landing technique of UAV in China.