Title:
SHIP MAIN ENGINE CONTROL SYSTEM AND METHOD
Document Type and Number:
WIPO Patent Application WO/2011/125466
Kind Code:
A1
Abstract:
The disclosed ship main engine control system and method calculate by simulation a propeller inflow rate which takes into account the ship motion relative to the combination of wave height, wave period, ship velocity relative to the water, ship weight, etc. The change in main engine rotation speed is calculated from the change in the calculated propeller inflow rate, and the standard deviation σ thereof is found. These results are stored as a standard deviation database (16). Referring to the standard deviation database (16), standard deviations are found during ship travel from the wave height, wave period, ship velocity relative to the water, and the ship weight, and an allowable rotation speed deviation ΔNt is calculated. In the control unit (14), PID control of the main engine (11) is performed, and multiple control modes with different gains are provided. The control mode of the control unit (14) is switched on the basis of comparing the rotation speed deviation and the allowable rotation speed deviation ΔNt in a comparison unit (15).
Inventors:
TSUJI YASUYUKI (JP)
INAMI SHOUICHI (JP)
MIYATA JUNYA (JP)
INAMI SHOUICHI (JP)
MIYATA JUNYA (JP)
Application Number:
PCT/JP2011/056621
Publication Date:
October 13, 2011
Filing Date:
March 18, 2011
Export Citation:
Assignee:
MITSUI SHIPBUILDING ENG (JP)
TSUJI YASUYUKI (JP)
INAMI SHOUICHI (JP)
MIYATA JUNYA (JP)
TSUJI YASUYUKI (JP)
INAMI SHOUICHI (JP)
MIYATA JUNYA (JP)
International Classes:
B63H21/21; F02D29/02
Foreign References:
| JP2009191774A | 2009-08-27 | |||
| JP2009202792A | 2009-09-10 | |||
| JP2006315474A | 2006-11-24 |
Attorney, Agent or Firm:
MATSUURA TAKASHI (JP)
Takashi Matsuura (JP)
Takashi Matsuura (JP)
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Claims: