摘要
为了解决空中遇险飞行人员的救生问题和实现特殊需求时的精确空投问题,文章针对国内某型号的翼伞空投系统,首先建立了六自由度刚性连接模型,重点分析了翼伞系统的滑翔特性和转弯特性;其次,使用Open GL动画显示技术对系统轨迹进行了虚拟仿真,使得仿真结果直观化、可视化。仿真结果表明,翼伞受到侧向风作用时会随风漂移,并且漂移速度近似等于风速;翼伞受到单侧下拉偏量作用时会进行转弯运动,且单侧下拉偏量越大,转弯速率越大,转弯半径越小。仿真结果与现有的飞行试验数据一致,证明了模型的正确性和有效性,为翼伞系统在空投上的运用提供了理论支撑。
In order to solve survival problems of flight crew who meet with danger and realise accurate paradrop when meeting with special situations, this paper is based on some parafoil airdrop system in China, six degrees of freedom rigidity connection model is developed firstly to calculate and simulate the parafoil＇s dynamic trajectory, especially analyze gliding and turning features of parafoil system; secondlly, virtual simulation is performed for system by OpenGL animation display technology, making simulation result more visual and direct. The simulation results show that parafoil will drift with the wind and its drift velocity is approximately equal to wind speed and will do turning movement when asymmetric deflection is applied. What＇s more, turning speed becomes bigger and turning radius becomes smaller with asymmetric deflection＇s increasing. The result is consistent with the existing flight experiment data, so the correctness and effectiveness of the model can be proved. In addition, it can also supply theoretical support for engineering application.
出处
《航天返回与遥感》
CSCD
北大核心
2017年第2期10-16,共7页
Spacecraft Recovery & Remote Sensing
关键词
动力学仿真
可控翼伞系统
动画显示技术
dynamics simulation
controllable parafoil system
animation display technology
