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Collision Avoidance of the Aircraft in the 3 Dimensional Space
Yoshihiro Yamaguchi,Hiroyuki Takano,Takeshi Yamasaki,Isao Yamaguchi 제어로봇시스템학회 2011 제어로봇시스템학회 국제학술대회 논문집 Vol.2011 No.10
Recently, domestic and overseas LCC’s (Low Cost Carriers) increase air-traffic in Japan. However, we have narrow domain and many airports. Large training areas of USAF or JSDF also exist in the airspace. In the present circumstances, the flight safety is kept by separating airways from training areas. In the near future, increasing number of flights will make severe situation. In this paper, we try to optimize the evasive courses of aircraft in the narrow airspace. We formulate collision avoidance as a nonlinear programming problem and analyzed numerically. The optimal solution we obtained show courses in narrower spaces than ordinary ones. The assumption of limited airspaces is useful in severe situation like bad weather. Thus, this study might be a good proposal to decide direction for collision avoidance.
Optimal Spacecraft Rendezvous with PNG
Hiroyuki Takano,Mini Matsuda,Takeshi Yamasaki,Isao Yamaguchi 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10
Recently, along with International Space Station, many rendezvous are carried out around the earth. Some of them are unmanned space freights and require automatic rendezvous procedure. In this paper, spacecraft rendezvous with input time-lag system are formulated as nonlinear programming problems based on the proportional navigation guidance (PNG) and numerically analyzed. The optimal solutions were obtained for several objectives. The problem of choice of the navigation constant that provides minimizing rendezvous time and control effort is analyzed. The results of computer simulation are given.