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在考虑载荷物和伞体相对运动的前提下,研究了动力翼伞纵向运动过程.将伞体和伞绳作为一个平面运动刚体,载荷物具有绕系挂点的摆动自由度,建立纵向四自由度动力学模型.求解翼伞从平飞至爬升状态推力阶跃操纵的动力学响应,由状态量的变化曲线得出动力操纵初期伞体失速倾覆的主要原因是迎角剧烈变化而超过失速边界.获得推力操纵值和推力增加速率所形成的操纵包线,当推力操纵幅度较小时,增加速率并无限制;当推力增加幅度较大时,增加速率的限制值随着增幅变大而减小.此外从能量角度计算了大动力快速操纵前后载荷物的机械能变化,并提出动力翼伞新的雀降操纵方式.计算表明该方法可以有效减少接地前后的能量,即可以减少接地后载荷物翻转对正面动力系统的冲击.
Considering the relative movement between the payload and the wing body, the longitudinal movement process of the wing is studied. The wing body and the umbrella line are regarded as a planar rigid body. The load has the freedom to swing about the hanging point of the winding system, The dynamic response of the wing parachute to the step-by-step thrust step-by-step operation is solved. The main reason for the stall rollover at the initial stage of dynamic maneuvering is that the angle of attack changes violently beyond the stalling boundary For the control envelope formed by the thrust manipulated value and the thrust increase rate, there is no limit to the increase rate when the thrust manipulation amplitude is small; when the thrust increase amplitude is larger, the limit value of the increase rate decreases as the increase rate increases In addition, the change of mechanical energy before and after large power fast maneuvering is calculated from the energy point of view, and a new way of maneuvering of maneuvering wings is proposed. The calculation shows that this method can effectively reduce the energy before and after grounding, Impact on the front power system.