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Title:
【発明の名称】船スタビライザ自動利得制御装置
Document Type and Number:
Japanese Patent JPH06508584
Kind Code:
A
Abstract:
PCT No. PCT/GB92/01139 Sec. 371 Date Jan. 18, 1994 Sec. 102(e) Date Jan. 18, 1994 PCT Filed Jun. 24, 1992 PCT Pub. No. WO93/00255 PCT Pub. Date Jan. 7, 1993.An improved fin stabilizer control system which has an automatic gain control (AGC) system which uses the difference between the control laws demand signals and the actual fin angles to calculate a gain factor to reduce the control laws demand until the non-linearities almost disappear. If more than one control law is used to generate a demand, the control laws can be prioritized and the available actuator power thus rationed. In particular, the automatic gain control (AGC) sub-system of the control law monitors the motions of the fins and detects when each fin is not following the control law demands. It adjusts the gain of the control law so as to reduce the slew rate limit and the fin angle limit effects. Although the automatic gain control (AGC) sub-system has the effect of reducing the control law loop gain, it reduces the ship motions below those achieved with a conventional control law because the phase lag between the demanded and actual fin angles is reduced and because generation of harmonics of the demanded fin angle is much reduced.

More Like This:
WO/1987/001345FOIL
JPS55132373HALF-SUBMERGED MULTIBARREL SHIP
Inventors:
Melville, Robert, George, Andrew
Macmeal, George
Application Number:
JP50139893A
Publication Date:
September 29, 1994
Filing Date:
June 24, 1992
Export Citation:
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Assignee:
Vickers PLC.
International Classes:
B63B39/06; G05D1/08; (IPC1-7): B63B39/06; G05D1/08
Attorney, Agent or Firm:
Asao Kamoda



 
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