Study On Aircraft Trajectory Of Automatic Ground Collision Avoidance Based On GIS

When the high performance aircraft is flying through the complex terrain in badweather, the G-force induced Loss Of Consciousness(G-LOC) incidents caused by high-Gresults in fatal accidents. The aircraft’s automatic collision avoidance technology is themost effective way to avoid such kind of incidents.As an important means of fire fighting, aircraft flying at low altitude is a matter ofgreat concern in recent years. Automatic ground collision avoidance trajectory planningalso attracts the national authorities and the scientific and technological workers’attention. It is not only the key technology of the aircraft automatic ground collisionavoidance, but also the technical support for the aircraft achieving autonomous flight. Thepaper studied the key technologies in-depth.Firstly, the paper analyzed the constitute of automatic ground collision avoidancesystem based on GIS, the input of terrain environmental elements, the prediction ofcollision avoidance trajectory and the basic requirements and constraints of the collisionavoidance trajectory, gave the mathematical description of the problem of aircraftautomatic ground collision avoidance trajectory; compressed digital terrain elevation data(DTED), transformed the optimization problem of collision avoidance trajectory into aseries of algebraic constrained nonlinear programming (NLP) problem through amathematical transformation and used Sequential Quadratic Programming for solving theaircraft two-dimensional trajectory planning by MATLAB; for the lack of aircrafttwo-dimensional automatic ground collision avoidance trajectory planning, made a studyof three-dimensional aircraft automatic collision avoidance simulation in AVDS by usinggeographic information systems(GIS) data, realized the three-dimensional aircraftautomatic collision avoidance trajectory planning.In conclusion, the paper made a study of aircraft ground collision avoidance trajectoryplanning method and the design of algorithm. The results of simulation show that thealgorithm is effectiveness and has a certain value.