关键词: 区域导航, 测距机, 导航台选择, 导航性能

Abstract:

Given the low accuracy and continuity caused by the frequent modification based on traditional DME/DME station selection algorithm,an avoiding frequently modifying automated DME/DME station selection algorithm of DME/DME RNAV route is proposed. By analyzing the coverage area of DME stations and calculating the effective area of DME/DME contiguous waypoints selected,the modification criterion is improved. Combining with area navigation requirements and the information of flight path and DME stations around,comparison and analysis with traditional algorithm is performed using the Matlab models of DME/DME station selection. And then the performance of DME/DME (selected)RNAV is estimated. Finally,based on the information of A593,some simulation experiments are performed. The simulation results show that the algorithm selects a pair of more reasonable DME,and the algorithm can satisfy the requirements of the DME/DME RNAV performance,meanwhile the stability of the algorithm can be improved.

Key words: RNAV, DME, station selection, navigation performance