【摘要】 针对大多数无人机回收采用主伞开伞而忽略减速伞开伞的影响，基于多体动力学建立了无人机两级伞降回收动力学模型，并对无人机两级伞降系统的动力学特性进行了分析。以某无人机为研究对象，得到了其在两级伞作用下的轨迹、姿态等运动特性，并通过移动减速伞吊点和主伞吊点，分析了无人机伞降过程中的俯仰角和飞行轨迹对吊点的敏感性。研究结果表明该伞降系统能够较好地完成无人机的回收任务，所得结论可为减速伞和主伞吊点的设计提供参考。更多还原

【Abstract】 A two-stage parachute recovery dynamic model of unmanned aerial vehicles(UAVs) was established based on multi-body dynamics, in response to the fact that most UAVs use the main parachute to open while ignoring the impact of the drag parachute to open.The dynamic characteristics of the UAV two-stage parachute system were analyzed.Taking a certain UAV as the research object, the trajectory, attitude and other motion characteristics under the action of a two-stage parachute were obtained.By moving the drag parachute attachment point and the main parachute attachment point, the sensitivity of the pitch angle and flight trajectory to the attachment point during the UAV parachute landing process was analyzed.The research results showed that the parachute landing system can effectively complete the UAV recovery task.The conclusions obtained can provide reference for the design of drag parachute and main parachute attachment points.更多还原