摘要
平流层飞艇作为执行高空长航时任务的平台近年来引起了全球范围的关注。平流层飞艇运行的技术难题之一就是其在定点保持模式下的自主定位和定姿问题。本文率先建立了平流层飞艇定点保持模式的动力学模型,在此基础上,采用李雅普诺夫(Lyapunov)稳定性理论针对平流层飞艇定点保持模式的非线性系统设计了一种非线性控制律,并证明了所得到的闭环系统是全局渐近稳定的。通过数学仿真验证了该控制方法对非线性系统控制的有效性。
In recent years, stratospheric airships as potential platforms for high-altitude/long-endurance missions have drawn worldwide attentions. One of technical challenges for operating of a stratospheric airship is its autonomous station and attitude keeping in station-keeping phase. A dynamic model for the airship in this phase is presented firstly. Based on the model, a kind of nonlinear control law is designed by using the direct method of Lyapunov. h is theoretically proved that the close-loop system is globally asymptot- ically stable. The performance of the method is demonstrated with numerical simulations.
出处
《航天控制》
CSCD
北大核心
2008年第4期35-39,共5页
Aerospace Control
