平流层飞艇运动分析与仿真  

Motion analysis and simulation of a stratospheric airship

作　　者：胡国昌[1] 吴美平[1] 

机构地区：[1]国防科技大学机电工程与自动化学院,湖南长沙410073

出　　处：《哈尔滨工程大学学报》2011年第11期1501-1508,共8页Journal of Harbin Engineering University

基　　金：国家"十一五"预研基金资助项目(51309060406)

摘　　要：针对平流层飞艇自主运行的需要,对其稳定性、能控性以及运动特性进行了研究.基于飞艇非线性动力学模型,利用线性化方法判断稳定性并分析了结构能控性;以线性化模型为基础,采用模态分析方法,研究其运动特性;采用仿真方法分析了扰动和控制作用下飞艇的运动特性.研究得到飞艇运动是不稳定的,同时飞艇是结构能控的,其纵向运动分为摆动、缓慢阻尼和快速阻尼3个模态,横侧向运动包括偏航振荡和滚动衰减2个模态.飞艇运动特性分析可作为实际飞艇控制的设计参考.While considering the requirements of self-action for stratospheric airships,stability,controllability,and motion characteristics were studied.Based on the nonlinear dynamic model of an airship,stability was determined and structural controllability was analyzed.The motion characteristics were also studied using the mode method on the basis of the linear model.Lastly,the motion characteristics of an airship under disturbance and control functions were analyzed using a simulation method.Theoretical and simulation results indicate the motion of the airship is unstable,and meanwhile,the airship is structurally controllable.The vertical motion can be classified into three modes of swaying,slow damping and rapid damping,and the transverse sideways movement includes two modes of yawing oscillation and rolling attenuation.The analysis of airship motion characteristics can be the theoretical basis for the control design of a stratospheric airship.

关 键 词：平流层飞艇 模态分析方法 稳定性 结构能控性 

分 类 号：V274[航空宇航科学与技术—飞行器设计]