摘要
针对有强烈干扰和不确定因素影响的近空间高超声速飞行器,提出了一种鲁棒最优广义预测控制律。控制律由最优广义预测控制律(OGPC)和一种新的泛函连接网络干扰观测器(FLNDO)构成。输出的有限时域预测由泰勒级数的展开实现。飞行中的未建模动态以及未知干扰由FLNDO来估计,并且文中也给出了FLNDO和闭环系统的稳定性分析。仿真结果表明对于姿态角和角速率的跟踪问题,设计的控制器达到了满意的控制效果,并且也成功实现了对干扰的抑制以及参数变化的鲁棒性要求。
A robust optimal generalized predictive control （OGPC） law was presented for a near-space hypersonic vehicle （NHV） in the presence of strong disturbances and uncertainties. The control law consisted of the OGPC law and a new functional link network disturbance observer （FLNDO）. The output prediction defined on finite horizon was carried out via Taylor series expansion. The unmodeled dynamics and unknown disturbances in flight were estimated by the FLNDO. The paper also provided stability analyses of the FLNDO and close-loop system. The simulation results show that the satisfactory performance of the controller for attitude angles tracking, the robustness to parameters variations and the disturbance rejection are successfully accomplished.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2009年第4期1489-1497,共9页
Journal of Astronautics
基金
国家自然科学基金重大研究计划项目(90716028)
关键词
近空间高超声速飞行器
非线性不确定系统
最优广义预测控制
泛函连接网络
干扰观测器
Near-space hypersonic vehicle
Nonlinear uncertain system
Optimal generalized predictive control
Functional link network
Disturbance observer
