摘要
针对着陆过程中飞机对象的非最小相位特性,设计了基于稳定逆的飞机纵向自动着陆控制律。通过求解系统内部动态的有界解,设计了系统对于期望轨迹的稳定逆;基于相对阶的概念设计了光滑、连续的进场着陆期望轨迹。由稳定逆产生期望控制输入和状态轨迹,反馈控制器克服飞机参数不确定性及外界干扰。仿真结果表明,所设计的自动着陆控制律具有精确跟踪期望轨迹的能力,满足国军标关于纵向着陆的要求。
With regard to nonminimum phase characteristics of the aircraft in automatic landing,a stable inversion-based longitudinal automatic landing control law is designed.By solving the bounded solution to system internal dynamics,stable inversion for the desired output trajectory is designed.Based on the relative degrees of the aircraft plant,a smooth and continuous desired landing trajectory is devised as well.The stable inversion controller is used to produce the desired control input and state trajectory while a feedback controller deals with the parameter uncertainties and external disturbances.Simulation shows that the automatic landing control law designed is capable of tracking the desired trajectory with high precison and meets GJB requirements on longitudinal automatic landing.
出处
《飞行力学》
CSCD
北大核心
2011年第2期33-36,40,共4页
Flight Dynamics
关键词
稳定逆
内部动态
相对阶
自动着陆
stable inversion
internal dynamic
relative degree
automatic landing
