高空飞艇俯仰稳定性及其边界分析  

Pitching stability and boundary research for high altitude airship

作　　者：姚中兵 张鹏 神策 YAO Zhongbing;ZHANG Peng;SHEN Ce(AVIC Aviation Simulation System Co.,Ltd.Shanghai 201100,China)

机构地区：[1]中航航空模拟系统有限公司,上海201100

出　　处：《飞行力学》2022年第5期28-33,共6页Flight Dynamics

摘　　要：高空飞艇的俯仰稳定性及其边界直接影响飞艇的飞行安全,是飞艇总体设计和控制系统设计中的关键内容。针对某型高空飞艇,建立其小扰动线化运动模型,完成了飞艇纵向稳定性分析。首先,开发了飞艇配平与稳定性评估程序,分析飞艇开环系统的俯仰稳定边界;然后,建立了飞艇俯仰姿态跟踪的闭环系统,基于线性矩阵不等式方法,分析了飞艇飞行状态空间的俯仰稳定边界。研究表明:该线化模型下飞艇具有纵向动稳定性;随着飞行高度增加,飞艇的俯仰稳定性改善;飞艇闭环跟踪系统在二维状态子空间的俯仰稳定边界为斜椭球,内部处于稳定状态。The pitching stability of high altitude airship is the key content in the airship overall design as well as control system design,which affects flight safety directly.The small perturbation linearized model of a high altitude airship is created,and the pitching stability of airship is researched.Firstly,a large airship trimming and stability assessment programming is developed,which is used to analyze the open-loop stability boundary of airship.Then,a closed-loop airship system for tracking pitching attitude is established to analyze the pitching stability boundary of airship space flight,based on linear matrix inequality(LMI).Research shows that the airship is in the longitudinal dynamic stable state.With the increase of flight altitude,the airship pitching stability improves.The airship closed-loop tracking system is an oblique ellipsoid stable boundary in two-dimensional subspace,the internal region of which is stable.

关 键 词：高空飞艇 小扰动线化 纵向稳定性 俯仰稳定边界 

分 类 号：V212.12[航空宇航科学与技术—航空宇航推进理论与工程] V274