机载防撞系统垂直防撞的物理模型

如何准确预测和估算本机与入侵飞机相遇时在最接近点的垂直间隔距离,是机载防撞系统(TCAS)在垂直方向上选择防撞措施的关键问题.采用空间相遇几何学的方法,建立了本机与入侵飞机相遇时垂直防撞的两种物理模型,基于该模型推导出了预测两机之间垂直间隔距离的计算公式,并且进行了计算机仿真.仿真结果表明,该模型能够准确预测本机与入侵飞机相遇时在最接近点的垂直间隔距离.最后,给出了本机在垂直方向上选择防撞措施的决策咨询条件和逻辑处理流程.

Physical Model for Vertical Collision Avoidance in Traffic Alert and Collision Avoidance System(TCAS)

The vertical separation at the closest point of approach predicted between a host aircraft and an intruder aircraft is a key issue to warrant resolution a dvisory in a traffic alert and collision avoidance system (TCAS). Two physical m odel s based on encounter geometry are established for vertical collision avoidance b etwee n the host and the intruder. The expressions of vertical separation predicted fo r collision avoidance are derived by these models, and the computer simulation i s performed for evaluating the validity of these models. The simulation result s hows that these models can predict the vertical separation at the closest point of ap proa ch in the case of two aircrafts encounter. Finally, the selection conditions of resolution advisory and the logic processing processes for a vertical maneuver a re given.