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강창구 대불대학교 2000 論文集 Vol.6 No.1
시모집중지기수주시계십팔편, 고제장분별계수, 측득이십칠수, 이십칠수전시칠언, 미견오언, 비실사모기수구시지최대특색, 자기 오언작품균위우수주, 군견기수주성편저, 단칠언측대부상동, 자기지칠언작품균위기수구성편저, 기후지칠언, 강적색대다수위우수구 연시적유기수주자, 시이칠언작품균위기수구성편저, 기후지칠언, 강적색대다수위우수주 연시적유기수주자, 시이칠언이기수주성편, 실전유소승. 이십칠수고전편칠언, 연우가대별위순칠언흥이칠언위기조지잡언양유, 그잡언기절반수, 비이현상, 예족이양아문더해, 사모움실능 유분수당주시가적상호락, 대시적체소십분심적, 언이십칠수기수주성편적시, 가 행, 궁체적러십구수, 가결사모기수구성편적시, 구유 풍부적낙초성, 사모기수구성편적시, 용음이위특이, 타적시유유구용음적, 적유위구용음적, 유수구인음적, 적유수구불인음적, 그용요 유찬중사, 서러전면제도적이십칠수기수 구성편지시외, 사모작중, 상유삼수, 표면상시우수구, 이실제상욕시분근불구적기수주시.
강창구,서상현,Gang, Chang-Gu,Seo, Sang-Hyeon 한국기계연구원 1983 기계연구원소보 Vol.10 No.-
When the hydrodynamic coefficients of the ship maneuvering equation are estimated by captive model test, it is difficult to take account of the scale effect between model and full scale ship. This scale effect problem can be overcome by processing the sea trial data with system identification. Extended Kalman filter is used as a system identification technique for the modification of the simulation equation as well as the estimation of hydrodynamic coefficients. The phenomena of simultaneous drifting of linear coefficients occur. It is confirmed that two coefficients in each pair-($Y_v$', $Y_r$' -m' u'), ($N_v$', $N_r$' )-are simultaneously drifting and all 4 coefficients are simultaneously drifting together. Particularly simultaneous drifting of 2 coefficients in each pair is more significant. It is also shown that the simultaneous drifting of 4 coefficients can be reduced by choosing the input data which have the random v'/r' curve and 4 coefficients are estimated within 2-4% error, which may be noise level. So, it is recommended to operate the rudder randomly in sea trial or model test for the application of system identification technique.