旋转降落伞系统角运动及稳定性分析

基于经典弹道方程,建立了旋转伞系统的复偏角方程和复摆动方程,研究了旋转伞系统在小扰动下的角运动规律。在此基础上,给出旋转伞系统角运动的扰动方程,分析了伞系统主要参数——阻力系数、导旋力矩系数、伞特征长度及载物质量等对运动稳定性的影响。结果表明:旋转伞系统的运动稳定性优于非旋转伞系统; 旋转伞系统的运动稳定性与转速、伞特征长度、载物质量等参数密切相关。研究结果可为旋转伞系统的设计和应用提供参考。

Angular Motion and Stability Analysis of Rotating Parachute System

Based on the classical ballistic equations,the plural deflection-angle equation and the plural pendulum-angle equation of rotating parachute system were built,and the angular motion law of the system under the condition of small disturbance was analyzed.On this basis,the perturbation equation of the angular motion was set up,and the effects of the main system parameters on the system kinetic stability were studied,including drag coefficient,spinning torque coefficient derivative,parachute characteristic length and payload mass.The results show that the stability of rotating parachute system is better than that of non-rotating parachute system.The system parameters mentioned above play significant roles on the system stability.The study offers references for the design and application of rotating parachute system.