学术论文

      动态滑翔动力学建模与风梯度能量获取

      Dynamics modeling of dynamic soaring and energy gaining from the wind gradient

      摘要:
      为简化问题描述和便于数学操作,对无动力飞机的动态滑翔问题做了假设,并在这些假设下建立了无动力飞机动态滑翔的动力学模型,即三维速度空间中只有一个输入变量的常微分方程组。之后,从理论上得到了这个三维速度空间中机械能可以增加的最大范围,即能增纺锤体内部,并推导出最大的机械能增加率。得出更大的风梯度、更小的阻力系数和更小的面质比更加有利于飞机获取能量的结论,该结论加深了对动态滑翔能量观点的认识,对实践有指导意义。
      Abstract:
      In order to simplify the description of the problems and to be convenient for mathematical manipulation,a series of hypotheses about the dynamic glide problem of unpowered aircraft were made.Under these hypotheses,a dynamics model of dynamic soaring,which is a 3-dimentional ordinary differential equations in the velocity space with a single input,was built.The largest growing area of mechanical energy in this velocity space,which is called energy-gained spindle,was obtained theoretically and the maximum rate of energy increasing was also deduced. The conclusion that the larger wind gradient,the smaller drag and the smaller area-mass ratio are more in favor of gaining energy for the engines aircraft gives a deeper understanding of the dynamic soaring energy and it can help the practice.
      Author: SHAN Shangqiu HOU Zhongxi ZHU Bingjie GAO Xianzhong
      作者单位: 国防科技大学 航天科学与工程学院,湖南 长沙,410073
      刊 名: 国防科技大学学报 ISTICEIPKU
      年,卷(期): 2015, (4)
      分类号: V221
      机标分类号: V32 V27
      在线出版日期: 2015年9月18日
      基金项目: 国家863计划资助项目