【摘要】 针对旋转固体火箭发动机发射小卫星最末级出现的章动现象,分析了其不稳定机理。根据实际观测的飞行数据,分析了飞行器章动不稳定性的特点,给出了几种可能导致飞行器发生侧向角运动的不稳定性机理,并结合实际情况,对各种机理进行了分析。结果显示,飞行器不稳定运动的主要原因是飞行器的质量变化、内部气流的非稳态流动与飞行器姿态运动的相互激励作用。分析结果指出了进一步研究的方向。更多还原

【Abstract】 The instability mechanism of nutation phenomenon which appears in the last stage of launching small satellite using spinning solid rocket motor was analysed.The nutational instability characteristics of flight vehicle were analysed according to practical observational flight data.Several kinds of possible instability mechanisms which result in lateral angle motion were given,and then they were analysed according to actual situation.The result shows that the main reason of the instability motion of flight vehicle is the interaction of the mass variation of flight vehicle and unsteady flow of interior gas and attitude motion of flight vehicle.The analysis result points out further research direction.更多还原