Algorithm Research & Explore
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App. Res. of Comp. Printed Article
Vol. 39, 2022 No. 1
118-122,127

Research on synchronous bi-directional A* algorithm based on sector field expansion

Chen Wantong1a,1b
Diao Tianru1b
Jia Jiqing2
Qin Shiwei2
1. a. Key Laboratory of Civil Aviation Flight Wide Area Surveillance & Safety Control Technology, b. College of Electronic Information & Automation, Civil Aviation University of China, Tianjin 300300, China
2. Qingdao Air Traffic Management Station of Civil Aviation of China, Qingdao Shandong 266041, China
DOI: 10.19734/j.issn.1001-3695.2021.06.0219

Abstract

In order to improve the safety and smoothness of flight, and solve the problems of excessive turning angle and too many search path nodes in the traditional A* algorithm, this paper proposed a synchronous bi-directional A* search algorithm based on sector field expansion. Firstly, this paper extended the hazardous area boundaries based on the raster map method. Secondly, it designed the A* algorithm based on synchronous bi-directional search, which dynamically defined the target nodes for forward and reverse search. Aiming at the problem of limiting search angles, this paper proposed a sector expansion strategy in 5×5 domain, and designed an evaluation function with double weight parameters to reduce the generation of redundant points. Finally, in order to verify the effectiveness of the improved algorithm, this paper selected square and irregular shape hazard areas for simulation. The results show that the improved algorithm searches for a smoother path. Compared with the results of the traditional bi-directional A* algorithm, the length of its search path reduce by 1.65% and 13.16%, and the number of its search path nodes reduce by 42.6% and 46.81%, respectively, under different shapes of hazard areas, which has a strong search efficiency.

Foundation Support

中国民航大学民航航班广域监视与安全管控技术重点实验室开放基金资助项目(202005)
国家自然科学基金资助项目(61901477)
天津市自然科学基金资助项目(19JCQNJC00800)
天津市教委科研计划项目(2020KJ011)

Publish Information

DOI: 10.19734/j.issn.1001-3695.2021.06.0219
Publish at: Application Research of Computers Printed Article, Vol. 39, 2022 No. 1
Section: Algorithm Research & Explore
Pages: 118-122,127
Serial Number: 1001-3695(2022)01-021-0118-05

Publish History

[2021-10-08] Accepted Paper
[2022-01-05] Printed Article

Cite This Article

陈万通, 刁天茹, 贾吉庆, 等. 基于扇形领域扩展的同步双向A*算法 [J]. 计算机应用研究, 2022, 39 (1): 118-122,127. (Chen Wantong, Diao Tianru, Jia Jiqing, et al. Research on synchronous bi-directional A* algorithm based on sector field expansion [J]. Application Research of Computers, 2022, 39 (1): 118-122,127. )

About the Journal

  • Application Research of Computers Monthly Journal
  • Journal ID ISSN 1001-3695
    CN  51-1196/TP

Application Research of Computers, founded in 1984, is an academic journal of computing technology sponsored by Sichuan Institute of Computer Sciences under the Science and Technology Department of Sichuan Province.

Aiming at the urgently needed cutting-edge technology in this discipline, Application Research of Computers reflects the mainstream technology, hot technology and the latest development trend of computer application research at home and abroad in a timely manner. The main contents of the journal include high-level academic papers in this discipline, the latest scientific research results and major application results. The contents of the columns involve new theories of computer discipline, basic computer theory, algorithm theory research, algorithm design and analysis, blockchain technology, system software and software engineering technology, pattern recognition and artificial intelligence, architecture, advanced computing, parallel processing, database technology, computer network and communication technology, information security technology, computer image graphics and its latest hot application technology.

Application Research of Computers has many high-level readers and authors, and its readers are mainly senior and middle-level researchers and engineers engaged in the field of computer science, as well as teachers and students majoring in computer science and related majors in colleges and universities. Over the years, the total citation frequency and Web download rate of Application Research of Computers have been ranked among the top of similar academic journals in this discipline, and the academic papers published are highly popular among the readers for their novelty, academics, foresight, orientation and practicality.

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