基于模糊控制的无人机大气数据模拟系统研究

Research of UAV Air Data Simulation System Based on Fuzzy Control

大气数据系统可为飞机提供高度、高度速率(升降速度)、空速和马赫数等飞机飞行状态的重要信息,并应用于飞控和导航系统中。为满足无人机半物理仿真研究的需求,提出了一种新颖的大气数据系统模拟方案,建立了由微分方程组描述的大气数据模拟系统的变结构非线性近似模型,并在此基础上进行了斜坡输入模糊控制器设计和数字仿真。仿真结果对比表明当模糊控制器各模糊语言值取高斯型隶属函数时调节时间短、进入稳态后响应平稳,控制效果最佳。

Air data system provides the aircraft with critical flight information：altitude,altitude rate（vertical speed）,airspeed and Mach number,which are used in flight control and navigation.In order to achieve UAV semi-physical simulation research,a novel scheme of air data simulation system is presented.Fuzzy controller for ramp input is designed based on nonlinear variable structure approximate model of the plant.Compared with other membership functions,Gauss membership function has a best compositive control quality.