平流层验证飞艇纵向动力学建模及其状态观测器设计

Longitudinal aerodynamic modeling and design of state observer for stratosphere verifying airship

在满足几点假设的基础上,建立了以体积中心为原点的坐标系,对平流层飞艇进行了受力分析,在对纵向力和力矩逐项阐述的基础上,导出了平衡状态下平流层飞艇纵向动力学模型的状态方程.根据12 m验证艇的实验飞行数据及外形尺寸特征,对能控性与能观测性进行了分析,在此基础上设计了全维状态观测器,解决了模型的状态反馈在性能和物理上的矛盾,为平流层飞艇的稳定飞行和自动控制提供了设计依据.

On the basis of meeting several hypotheses, a coordinate system with its origin at the center of volume is established, and force analysis of stratosphere airship is carried out. Based on seriatim explaining longitudinal forces and moments, state equation of longitudinal aerodynamic model for stratosphere airship under balance is set up. According to experimental flight data and shape dimension characteristics, controllability and observability are analyzed, and then the observer is designed. This observer solves contradiction between performance and physics of the state feedback of the model. Moreover, it also provides design reference for design of stable flight and automatic control of stratosphere airship.