CAJ | 학술논문

平流层飞艇的总体布局、升空原理和工作模式明显不同于导弹、飞机等传统飞行器，其动力学特性亦不同于上述飞行器，须深入研究其飞行动力学的基本特性、一般规律和内在机理。针对此问题，系统研究了平流层飞艇的飞行模态。采用小扰动方法推导了平流层飞艇的线性运动方程，将其解耦分组为纵向运动方程和横侧向运动方程；定义模态及模态参数，研究平流层飞艇的模态分析方法；通过计算分析状态方程的特征值和特征向量，研究了平流层飞艇的飞行模态。结果表明：纵向运动由浮沉、浪涌和摆动三种模态叠加而成，横侧向运动由偏航衰减、侧滑衰减和滚转振荡三种模态叠加而成。
평류층비정적총체포국、승공원리화공작모식명현불동우도탄、비궤등전통비행기，기동역학특성역불동우상술비행기，수심입연구기비행동역학적기본특성、일반규률화내재궤리。침대차문제，계통연구료평류층비정적비행모태。채용소우동방법추도료평류층비정적선성운동방정，장기해우분조위종향운동방정화횡측향운동방정；정의모태급모태삼수，연구평류층비정적모태분석방법；통과계산분석상태방정적특정치화특정향량，연구료평류층비정적비행모태。결과표명：종향운동유부침、랑용화파동삼충모태첩가이성，횡측향운동유편항쇠감、측활쇠감화곤전진탕삼충모태첩가이성。
The aerodynamic shape,overall design and operation principle of stratospheric airships are different from the conventional aircrafts such as airplane and missile,and the flight mechanism.The dynamics characteristics of the stratospheric airship are different from the conventional aircrafts.Therefore,the inherent mechanism and characteristics of the stratospheric airship need to be further investigated.The linearization equations of motion for stratospheric airship were derived by using the“small disturbance”theory,which could be divided into longitudinal motion and lateral-directional motion.The fight modes and mode parameters were defined,and an analytical method was proposed to analyze the flight dynamics.Flight modes of the stratospheric airship were investigated based on eigenvalue and eigenvector of the state equations.Results show that the longitudinal motion includes three modes:heave mode,surge mode and pendulum mode,whereas the lateral motion includes another three modes:yaw mode,sideslip mode and roll oscillation mode.