摘要
针对25 kg固定翼无人机设计了一种带有阻力伞的L形网的撞网回收系统。将柔性网和阻力伞作为撞网回收系统的阻尼装置,利用柔性网吸能缓冲和阻力伞的空气阻力达到无人机在撞网回收中以低过载平稳回收。回收过程依据阻尼力的变化将无人机撞网回收过程分为3个阶段,根据阻尼力的特点并对每一回收阶段作出相关假设分别进行动力学建模,运用ANSYS/LS-DYNA和Matlab/Simulink进行动力学模型仿真。结果表明:25 kg固定翼无人机以30 m/s的速度,飞向带有8个有效阻力面积为1.69 m^(2)的阻力伞的L形网,回收过程中的无人机峰值过载约为6.1 g,可达到无人机快速平稳回收的目的。
For the 25 kg fixed-wing UAV recovery system,an L-shaped net drag parachute net-recovery system was designed.Flexible net and drag parachute were used as the damping device of the net-recovery system.We used the energy-absorbing buffer of the flexible net and the air resistance characteristics of the drag parachute to achieve the purpose of smooth recovery with low overload during the recovery process.According to the change of damping force,the recovery process divides the UAV recovery process into three phases,and carries out dynamic modeling according to the assumptions of each phase and the characteristics of the damping force.Finally,the dynamic model simulation of the UAV net-recovery process carries out in ANSYS/LS-DYNA and Matlab/Simulink environment and then performs example verification.The results show that 25 kg fixed-wing UAV with a speed of 30 m/s and 8 drag parachutes with a drag area of 1.69 m^(2) can limit the peak overload of the UAV during the recovery process to 6.1 g,which can achieve the purpose of rapid and stable recovery of UAV.
作者
蔡亮
闫兆武
CAI Liang;YAN Zhaowu(School of Aircraft Engineering, Nanchang Hangkong University, Nanchang 330063, China;School of General Aviation, Nanchang Hangkong University, Nanchang 330063, China)
出处
《兵器装备工程学报》
CSCD
北大核心
2022年第4期224-229,共6页
Journal of Ordnance Equipment Engineering
基金
江西省中等航时无人机技术与设备开发创新能力建设项目(235000232080)。
关键词
无人机
撞网回收
柔性绳网
动力学建模
数值仿真
unmanned aerial vehicle
net-recovery
flexible net
dynamic model
numerical simulation
