AUTOMATION COLLISION AVOIDANCE SYSTEM FOR SHIPS USING FUZZY CONTROL

A proposal is made for an automatic collision avoidance system controlled by an onboard computer. The system comprises four membership functions: 1) data acquisition from radar signal; 2) decision of the collision risk; 3) speed or course change command; 4) course control by autopilot. All of these functions, with the exception of data acquisition, are performed using fuzzy reasoning or fuzzy control. Fuzzy control is similar to human control and therefore flexible even to unexpected environmental changes. The system design is outlined and algorithms of each subsystem are described. While it is not necessary to apply fuzzy control for course keeping and course changing, it has been attempted in the present case. The fuzzy control autopilot is very smooth and reacts quickly to an abrupt course change. Computer simulation has been done for the various relative conditions of a target ship and the results are found to be comparable with observations of human behaviour made at a ship handling simulator.

• Supplemental Notes:
  • Kansai Soc. Nav. Arch. J., No. 205 (1987), p. 1 (June) [10 pp., 10 ref., 4 tab., 20 fig.]
• Authors:
  • Hasegawa, K
  • Kouzuki, A
• Publication Date: 1987

Language

• Japanese

Subject/Index Terms

• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00692471
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM