航空学报 > 2001, Vol. 22 Issue (2): 163-167

飞机地面运行的动力学模型

顾宏斌   

  1. 南京航空航天大学民航学院,江苏南京210016
  • 收稿日期:2000-05-09 修回日期:2000-09-01 出版日期:2001-04-25 发布日期:2001-04-25

DYNAMIC MODEL OF AIRCRAFT GROUND HANDLING

GU Hong bin   

  1. Civil Aviation College, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China
  • Received:2000-05-09 Revised:2000-09-01 Online:2001-04-25 Published:2001-04-25

摘要:

建立的飞机地面运动数学模型是“可操纵的”,机体有6个自由度。该模型只要给定操纵信号,就能求出前轮和飞机的运动及其相互作用。飞机地面运动模型采用无滑动轮胎模型,不再引入任何人为的运动学假设,不要事先给定前轮转角,不依赖于需要复杂测定的侧向力函数,考虑了轮胎的滚动特性。对飞机的地面运动一直沿用瞬时转动中心等价于质心轨迹的曲率中心的假设。研究表明 ,飞机的瞬时转动中心与质心轨迹的曲率中心只在飞机稳定转弯时重合。

关键词: 飞机, 地面车辆, 数学模型, 动力学, 前轮操纵转向

Abstract:

The model of aircraft’s ground motion is “operational”,where the airframe has six degrees of freedom. As long as the pilot’s command, the paddle’s displacement, for example, is given, the model can find out the motion of both the airframe and nose wheel, and the interaction between them. The non sliding model of tires is applied but no assumption of airframe’s motion is adopted. The turning angle of the nose wheel is not given in advance. The functions of tire force versus nose wheel’s turning angle are no longer needed while the tire rolling coefficients are employed. There are assumptions about aircraft’s ground motion; one of those widely used is “the center of simultaneous turning of the airframe is the same as the center of curvature of the mass center’s track”. The research in this paper reveals that this is true only when the aircraft is in a steady state turning.

Key words: aircraft, ground vehicles, mathematical models, dynamics, steering

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