Design Of Flight Attitude Control Law For Fixed-wing UAV

With the progress of the science and technology, the UAV is more and more important to human life. This paper from the aspects of engineering application, combined with the related research achievements at home and abroad, has studied problems of fixed-wing UAV flight attitude control law.Firstly, under the premise of understanding the requirements of design,Skywalker 1680fixed-wing model aircraft UAV as a platform for UAV flight control system design of the overall program. The system has two parts: the attitude detection section and the control section,separately for each part of the selection of the hardware involved, and complete the circuit board manufacturing. After the work of hardware design completed, the design of software program is began.Secondly, there are many variables in the time of the UAV performs flight task, in order to facilitate research, we analysis several common coordinate systems. Which includes the body coordinate system, the ground coordinate system, the coordinate system airflow and track coordinates, etc. And to determine the coordinates of unmanned aerial vehicles in the attitude angle and its form of expression. It lays a foundation for the subsequent chapters of the work,provide a lot of convenience.Thirdly, under the premise of clear control law design goals, PID method, expand UAV attitude control law design work. This article will be divided into three parts of its design, including longitudinal, transverse and lateral channel speed channel. Longitudinal channel includes pitch angle and flight height channels, including for lateral roll angle and heading angle passage. Design of the control method for each channel, giving control charts, control law to determine the final form of expression. After them, we conduct simulink simulation, and give simulation results table curves and specific parameters for each variable. Which provide a theoretical basis and guarantee for the flight test, improve the success rate of test.Finally, under the test conditions better situation for the design of practical application of the system flight testing and commissioning, remote control UAV flight by remote control and observe the display ground station interface, to achieve a stable flight attitude control. Ensure the accuracy when it is perform tasks. Reach the requirements of flight stability, which is“863”project “MicroUAV remote sensing information acquisition and crop nutrient management technology” requests UAV flight control.