摘要
介绍了定量反馈理论(QFT)的基本原理和设计步骤;定量反馈理论作为一种新颖的频率域鲁棒控制技术,综合考虑了对象的不确定性范围和系统的性能指标要求,以定量方式进行分析设计,从而保证了设计结果具有稳定鲁棒性和性能鲁棒性;无人机飞行过程中具有较强的不确定性,气动参数会不断发生变化,运用QFT对无人机纵向飞行控制系统进行设计,可以很好解决飞行控制系统中的不确定性问题;仿真结果显示,QFT设计的控制器能够很好地满足无人机鲁棒稳定性指标和跟踪性能,符合纵向控制的要求。
Basic principle and design process of Quantitative Feedback Theory （QFT） are introduced. QFT, a new frequency domain based robust control design approach, takes account of both the scope of the plant＇s uncertainty and performance requirements to the system. So it can ensure that design results have stability robustness and performance robustness. The instability during the flight of UAV causes the aerodynamic parameters＇ change. Control designed using QFT can solve this problem. A longitudinal flight control law was designed by QFT approach. Design result and simulation tests indicate that the control system has good robust stability and tracking performance.
出处
《计算机测量与控制》
CSCD
北大核心
2009年第2期324-326,共3页
Computer Measurement &Control
