A Low-Altitude Flight Conflict Detection Algorithm Based on a Multilevel Grid Spatiotemporal Index
Flight conflict detection is fundamental to flight dispatch, trajectory planning, and flight safety control. An ever-increasing aircraft population and higher speeds, particularly the emergence of hypersonic/supersonic aircrafts, are challenging the timeliness and accuracy of flight conflict detecti...
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doaj-19bdce68869a47b4b606802f5c7408f72020-11-24T21:27:54ZengMDPI AGISPRS International Journal of Geo-Information2220-99642019-06-018628910.3390/ijgi8060289ijgi8060289A Low-Altitude Flight Conflict Detection Algorithm Based on a Multilevel Grid Spatiotemporal IndexShuangxi Miao0Chengqi Cheng1Weixin Zhai2Fuhu Ren3Bo Zhang4Shuang Li5Junxiao Zhang6Huangchuang Zhang7College of Engineering, Peking University, Beijing 100871, ChinaCollege of Engineering, Peking University, Beijing 100871, ChinaAcademy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, ChinaBeijing Institute of Big Data Research, Beijing 100871, ChinaHeilongjiang Institute of Geography Information Engineering, Harbin 150081, ChinaInstitute of Remote Sensing and GIS, Peking University, Beijing 100871, ChinaFaculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, ChinaCollege of Engineering, Peking University, Beijing 100871, ChinaFlight conflict detection is fundamental to flight dispatch, trajectory planning, and flight safety control. An ever-increasing aircraft population and higher speeds, particularly the emergence of hypersonic/supersonic aircrafts, are challenging the timeliness and accuracy of flight conflict detection. Traditional trajectory conflict detection algorithms rely on traversing multivariate equations of every two trajectories, in order to yield the conflict result and involve extensive computation and high algorithmic complexity; these algorithms are often unable to provide the flight conflict solutions required quickly enough. In this paper, we present a novel, low-altitude flight conflict detection algorithm, based on the multi-level grid spatiotemporal index, that transforms the traditional trajectory-traversing multivariate conflict computation into a grid conflict state query of distributed grid databases. Essentially, this is a method of exchanging "storage space" for "computational time". First, we build the spatiotemporal subdivision and encoding model based on the airspace. The model describes the geometries of the trajectories, low-altitude obstacles, or dangerous fields and identifies the grid with grid codes. Next, we design a database table structure of the grid and create a grid database. Finally, we establish a multilevel grid spatiotemporal index, design a query optimization scheme, and examine the flight conflict detection results from the grid database. Experimental verification confirms that the computation efficiency of our algorithm is one order of magnitude higher than those of traditional methods. Our algorithm can perform real-time (dynamic/static) conflict detection on both individual aircraft and aircraft flying in formation with more efficient trajectory planning and airspace utilization.https://www.mdpi.com/2220-9964/8/6/289multilevel grid spatiotemporal indexaircraft trackingconflict detection |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Shuangxi Miao Chengqi Cheng Weixin Zhai Fuhu Ren Bo Zhang Shuang Li Junxiao Zhang Huangchuang Zhang |
spellingShingle |
Shuangxi Miao Chengqi Cheng Weixin Zhai Fuhu Ren Bo Zhang Shuang Li Junxiao Zhang Huangchuang Zhang A Low-Altitude Flight Conflict Detection Algorithm Based on a Multilevel Grid Spatiotemporal Index ISPRS International Journal of Geo-Information multilevel grid spatiotemporal index aircraft tracking conflict detection |
author_facet |
Shuangxi Miao Chengqi Cheng Weixin Zhai Fuhu Ren Bo Zhang Shuang Li Junxiao Zhang Huangchuang Zhang |
author_sort |
Shuangxi Miao |
title |
A Low-Altitude Flight Conflict Detection Algorithm Based on a Multilevel Grid Spatiotemporal Index |
title_short |
A Low-Altitude Flight Conflict Detection Algorithm Based on a Multilevel Grid Spatiotemporal Index |
title_full |
A Low-Altitude Flight Conflict Detection Algorithm Based on a Multilevel Grid Spatiotemporal Index |
title_fullStr |
A Low-Altitude Flight Conflict Detection Algorithm Based on a Multilevel Grid Spatiotemporal Index |
title_full_unstemmed |
A Low-Altitude Flight Conflict Detection Algorithm Based on a Multilevel Grid Spatiotemporal Index |
title_sort |
low-altitude flight conflict detection algorithm based on a multilevel grid spatiotemporal index |
publisher |
MDPI AG |
series |
ISPRS International Journal of Geo-Information |
issn |
2220-9964 |
publishDate |
2019-06-01 |
description |
Flight conflict detection is fundamental to flight dispatch, trajectory planning, and flight safety control. An ever-increasing aircraft population and higher speeds, particularly the emergence of hypersonic/supersonic aircrafts, are challenging the timeliness and accuracy of flight conflict detection. Traditional trajectory conflict detection algorithms rely on traversing multivariate equations of every two trajectories, in order to yield the conflict result and involve extensive computation and high algorithmic complexity; these algorithms are often unable to provide the flight conflict solutions required quickly enough. In this paper, we present a novel, low-altitude flight conflict detection algorithm, based on the multi-level grid spatiotemporal index, that transforms the traditional trajectory-traversing multivariate conflict computation into a grid conflict state query of distributed grid databases. Essentially, this is a method of exchanging "storage space" for "computational time". First, we build the spatiotemporal subdivision and encoding model based on the airspace. The model describes the geometries of the trajectories, low-altitude obstacles, or dangerous fields and identifies the grid with grid codes. Next, we design a database table structure of the grid and create a grid database. Finally, we establish a multilevel grid spatiotemporal index, design a query optimization scheme, and examine the flight conflict detection results from the grid database. Experimental verification confirms that the computation efficiency of our algorithm is one order of magnitude higher than those of traditional methods. Our algorithm can perform real-time (dynamic/static) conflict detection on both individual aircraft and aircraft flying in formation with more efficient trajectory planning and airspace utilization. |
topic |
multilevel grid spatiotemporal index aircraft tracking conflict detection |
url |
https://www.mdpi.com/2220-9964/8/6/289 |
work_keys_str_mv |
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