气囊式无人机缓冲系统的着陆侧翻现象

摘要

文章研究无人机气囊缓冲系统的着陆侧翻问题.首先,建立了无人机着陆冲击动力学模型,通过仿真分析技术对无人机的典型着陆过程进行模拟,发现该型无人机在着陆过程中存在机身侧翻的现象,有可能对机翼产生不利影响;随后,引入翼尖触地速度作为指标对侧翻程度进行评估,研究了翼尖触地速度与侧向着陆速度之间的关系;针对该无人机着陆过程中产生的翻滚问题,综合翼尖触地速度计算结果,提出了减缓翻滚现象的途径;最后,通过仿真分析对所提出的解决方案进行评价.研究结果表明,文章提出的减缓无人机着陆翻滚问题解决方案可靠合理.%This paper is mainly on the landing turn-over problem of one type of Unmanned Aerial Vehicle (UAV) with the airbag cushion systems. Firstly, a dynamic model of landing impact of the UAV is established, and then by analytical simulation of the UAV typical landing processes, some turn-over phenomenan are observed which may do harm to the vehicle. Secondly, a wingtip velocity is introduced as the measurement of the phenomenan, and the relationship between the wingtip velocity and lateral velocity is studied in the paper. For the issue of turn-over in the process of landing, by combining with the wingtip velocity data, a scheme of alleviating the turn-over phenomenan is proposed. Finally, the evaluation for the scheme is given by simulation analysis. The result shows the rationality of the scheme in alleviating the magnitude of turn-over.