| 一种改进的降落伞动力学模型 |
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| 引用本文： | 杨雪余莉史献林李允伟.一种改进的降落伞动力学模型[J].南京航空航天大学学报,2016,48(4):481-485. |
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| 作者姓名： | 杨雪余莉史献林李允伟 |
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| 作者单位： | 南京航空航天大学航空宇航学院;上海飞机设计研究院 |
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| 摘 要： | 为更准确地模拟降落伞动力学特性,根据质点系动量定理和动量矩定理推导出一种改进的降落伞动力学模型。基于该模型对某十字型伞开展了稳降阶段的编程计算,获得了降落伞和载荷体的速度及姿态角的变化情况,数值计算结果和空投试验结果有很好的一致性。该模型易于编程,相较于传统模型能得到更准确的降落伞速度和姿态角的振荡频率,是传统降落伞动力学模型的有益补充。
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| 关 键 词： | 降落伞 质点系 动力学模型 动量定理 动量矩定理 |
Improved Dynamic Model on Parachutes |
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| Yang Xue;Yu Li;Shi Xianlin;Li Yunwei.Improved Dynamic Model on Parachutes[J].Journal of Nanjing University of Aeronautics & Astronautics,2016,48(4):481-485. |
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| Authors: | Yang Xue;Yu Li;Shi Xianlin;Li Yunwei |
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| Institution: | Yang Xue;Yu Li;Shi Xianlin;Li Yunwei;College of Aerospace Engineering,Nanjing University of Aeronautics & Astronautics;Shanghai Aircraft Design and Research Institute; |
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| Abstract: | In order to obtain more accurate dynamic characteristics of parachute, an improved dynamic model is deduced according to the
momentum and the momentum moment theorems of the particle system. On the basis of the model, the terminal descent stage of a cruciform parachute is coded. The change processes of the velocity and attitude angles of the parachute a
nd payload are obtained. The simulation results are consistent with the airdrop
test results. This model is easy to program and can obtain more accurate oscillation frequency of the parachute velocity and attitude angles. Therefore, the model is a
useful supplement to the conventional parachute dynamic model. |
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| Keywords: | parachute particle system dynamic model momentum theorem momentum moment theorem |
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