摘要
针对一种大弹性效应飞行器的控制问题进行研究,该类飞行器的首阶弹性振动频率极低,接近于短周期模态。高阶弹性飞行器的动力学特性与刚性飞行器存在本质的差别,无法利用传统控制方法达到要求的飞行品质,而且抗干扰性和鲁棒稳定性更差。将模型跟踪方法与H∞混合灵敏度方法结合,设计了考虑气动弹性影响的综合飞行控制律,并针对弹性飞行器的特点设置输入、输出权函数,对飞行品质、抗干扰性和鲁棒性等多个设计目标进行折衷。计算结果表明,该方法可以满足弹性飞行器控制多方面的设计要求。
A control law design method has been researched for a kind of high-level flexible aircraft,whose first-order aeroelastic frequency is close to the short-period mode.The dynamic characteristics of this kind of high-order flexible aircraft are intrinsic different from traditional rigid one.It is with bad performances and robustness and hard to obtain flying qualities with traditional control method.The model-following and H∞mixed-sensitivity synthesis approach is applied to obtain a synthetical flight control law,which also deals with the aeroelastic effect.The groups of weight functions have been chosen to trade-off in flying qualities,disturbance rejection and robustness.The result shows that this approach meets the multiple demands of the flexible aircraft control.
出处
《飞行力学》
CSCD
北大核心
2010年第4期21-24,共4页
Flight Dynamics
基金
航空科学基金资助(2009ZA52015)
关键词
弹性飞行器
飞行控制
鲁棒控制
模型跟踪
H∞控制
aeroelastic vehicle
flight control
robust control
model-following
H∞control
