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。
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 sys- tem. 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 and payload are obtained. The sim- ulation 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.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2016年第4期481-485,共5页
Journal of Nanjing University of Aeronautics & Astronautics
关键词
降落伞
质点系
动力学模型
动量定理
动量矩定理
parachute
particle system
dynamic model
momentum theorem
momentum moment the- orem
