摘要
针对推力矢量飞机大迎角飞行纵向控制,提出一种鲁棒动态逆方法.对时标分离非线性动态逆的内外回路控制结构进行修改,通过坐标变换得到一个弱非线性系统;然后对该系统模型的已知部分和不确定部分同时进行小扰动线性化,转化得到线性不确定系统;在此基础上利用综合方法设计鲁棒控制器.该方法能够为非线性动态逆控制提供鲁棒稳定性和鲁棒性能保证,并可回避时标分离问题.仿真结果验证了所提出方法的有效性.
A robust dynamic inversion approach is proposed for the longitudinal control of an aircraft with thrust vectoring at high angles of attack.The inner-loop-outer-loop control structure of the nonlinear dynamic inversion via time-scale separation is modified,and a system with weak nonlinearity is obtained through coordination transformation.Then,the model of this system,including both known and unknown parts,is linearized through little perturbation and translated into a linear uncertain system,on this basis a robust controller is designed by using the-synthesis method.The proposed approach can guarantee the robust stability and the robust performance of nonlinear dynamic inversion control,and it can also avoid the need for time-scale separation.Simulation results show the effectiveness of the control approach.
出处
《控制与决策》
EI
CSCD
北大核心
2013年第7期1113-1116,共4页
Control and Decision
基金
国家自然科学基金项目(60974142)
关键词
鲁棒控制
非线性动态逆
大迎角
结构奇异值综合
时标分离
robust control
nonlinear dynamic inversion
high angle of attack
structure singular value synthesis
timescale separation
