Research On Control System Of High-Altitude Long-Endurance UAV

To be the major development target in the future, the design and implementation of the Unmanned Aerial Vehicles’control system plays an important role. Taking a small UAV flight control system design as background, this article has a strong application of scientific research and engineering application. Micro-mechanical and new achievements in microelectronics have been utilized in this paper, which were perfectly integrated in the UAV’s control subsystem. An UAV automatic flight control system which brings the digital system into advantages has been designed. The main contents of the article are as follows:First, by means of analysing the small UAV’s force and torque under flying environment, six degrees of freedom kinematics model has been established, with which the attitude and velocity of the UAV were characterized during the conventional maneuver process.Second, the control law of the UAV has been decomposed into longitudinal control and lateral flight control, and a control law design which based on PID control law has been completed.Finally, the realization of a UAV flight control system hardware were designed, which including control system design, PCB controller design and control system design of the hardware connection and the program structure. We have designed a flight control system-the autopilot, the devices selected in this system are sufficient to meet the request of performance, small size, low power consumption. The core solution and control uint of the design is TMS28335 chip, the sensor which we choose is micro-electromechanical systems(MEMS), including the initial measurement uint IMU, a small number of steering gear, GPS receiver, magnetic heading sensor, pressure altitude and air speed sensors and other mature products. The hardware systems meet the design requirement after commissioning. By ground experiment and actual flight experiment, the control law woks perfectly and the hardware control system meets the requirement.