Control system design and performance evaluation of anti-pitching fins

Autor:	Jenhwa Guo, Tsong-Neng Wu, Wen-Ching Chen, Yih-Nan Chen
Rok vydání:	1999
Předmět:	Engineering Fin business.industry Mechanical Engineering Ocean Engineering Seakeeping Structural engineering Oceanography Nonlinear system Computer Science::Sound Mechanics of Materials Control theory Offshore geotechnical engineering Ship stability Systems design Reduction (mathematics) business
Zdroj:	Journal of Marine Science and Technology. 4:0117-0122
ISSN:	0948-4280
DOI:	10.1007/s007730050014
Popis:	We have investigated the usefulness of active stabilizing fins to reduce ship pitching under varying forward speeds, and in varying wave lengths. A 4-m self-propelled model ship and an electrohydraulically driven stabilizing fin system were used in our experiment. Pitch angles, pitch rates, and ship forward speeds were measured and fed back to a controller to calculate the deflection angle of the stabilizing fin. The effects of fin nonlinearity on achievable pitch reduction performance are discussed. It is shown that the desired pitch response can only be achieved when the fin is operated in the linear region. The overall dynamic response of the ship approaches open-loop behavior when the degree of nonlinearity is high. This simple analysis of the pitch stablizing system provides basic information to ship designers. Experimental results validate these design guidelines.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4d9ff63ca4ae9c901dbc5529320cc0f1 https://doi.org/10.1007/s007730050014 Zobrazit plný text záznamu Full text from SpringerLink