A Calculation Method of Limit Alarm Curve Based on Terrain Following Model
In recent years,civil aircraft crash accidents caused by terrain factors are frequent.In or-der to improve the safety factor of general aviation flight and to reduce the accident tragedy,a set of reli-able and effective calculation method of limit alarm curve based on terrain following model is proposed.Firstly,terrain following track planning is carried out according to the global digital terrain data.Secondly,the basic motion model and collision model of the aircraft are constructed,and the corresponding alarm method is established by using the flight state of each planned track point.Then the calculation method of the limit alarm point is proposed according to the operation process of obstacle avoidance when an alarm triggers.Finally,a complete limit alarm curve is obtained by interpolation fitting method.The simulation verification shows that the limit alarm curve fitted by the algorithm is reasonable and effective.When the aircraft flies on a fixed route,the alarm information and reasonable limit collision avoidance scheme can be quickly obtained by quickly comparing the intersection point between the course and the limit alarm curve.
万方数据
维普
