大型翼伞归航控制航迹仿真分析

Large Parafoil Guidance Navigation & Control Algorithm Simulation

为了对翼伞归航算法的航迹控制有效性进行验证,可以采用空投试验或仿真分析2种方法.空投试验获取航迹数据准确性高,但存在人员和物资投入成本高、协调工作量大的缺点.而仿真分析具有成本低、易实现的优点,但由于气象条件和翼伞本身气动特性的不确定性,仿真结果与真实空投数据会有差异.如果在仿真分析的过程中采用真实空投获取的翼伞关键参数建立翼伞模型,则仿真方法的准确性会得到很大的提升,是一种低成本验证归航控制算法航迹准确性的优选方案.对大型翼伞归航控制航迹仿真分析方法进行了研究,并通过其仿真数据与真实空投数据的比较说明了该仿真方法的有效性和可行性.通过对风的仿真说明了风速和风向对翼伞飞行航迹的影响.结果表明,该方法可以辅助优化翼伞归航控制算法设计,是一种低成本易实施的验证方式,可为控制算法的验证、分析和改进工作提供良好的参考依据.

bstract：There are two ways to verify the flying path of parafoil using certain control algorithm： one is plane drop test and the other one is simulation. Using the method of drop test can fetch the precise data of flying path for parafoil, but the cost of human labor and material is very high, while the simulation has the advantages of low cost and less difficulty. But the simulation result will be different from the data fetched by real airdrop experiment because of the uncertainty of atmosphere and parafoil pneumatic characteristic. If the pneumatic model of parafoil can be established by using data fetched by real airdrop test, the accuracy of simulation result will be improved tremendously. Therefore it is an optimal method to verify the accuracy of parafoil control algorithm. The method of simulation analysis for parafoil returning control algorithm was researched in this paper, and the validity and feasibility was illustrated by comparing the simulation data and real drop test data. The wind effect on flying path of parafoil was studied by simulation with different wind directions and velocities. The result shows that the method can improve the design of parafoil for guidance and navigation algorithm. And it？？s a cost-effective method which is easy to apply. It can provide good reference for the validation, analysis and improvement of control algorithm.