Ships – Steering mechanism – Fluid pressure
Patent
1994-10-11
1996-04-23
Sotelo, Jesus D.
Ships
Steering mechanism
Fluid pressure
440 61, B63H 2522
Patent
active
055093698
ABSTRACT:
An automatic steering system (10) has a control subsystem (14) that employs a yaw rate control loop (90) and a steering control loop (92) to drive a hydraulic subsystem (12) in which the deflection rate of a steering actuator (16) is controlled without need for either a steering actuator angle sensor or an electronic steering bias integrator. Rather, the control subsystem employs a proportional rate servosystem to control the steering actuator deflection rate and a double-acting hydraulic cylinder (34) to provide the steering bias integral action. The control subsystem employs an electric compass (96) to generate heading data that are stored in a heading command register (102). A heading error is formed by calculating a difference between a desired heading and the current heading. A rate taker (94) generates a yaw rate feedback signal by differentiating changes in the current heading. The heading error and yaw rate feedback signal are processed to generate a steering rate command to which the steering control loop responds by pumping hydraulic fluid at a rate proportional to the steering rate command into the hydraulic cylinder to deflect the steering actuator of an outboard motor (18).
REFERENCES:
patent: 3468126 (1969-09-01), Mercier
patent: 3888201 (1975-06-01), Zuvela
patent: 4418931 (1983-12-01), Howard
patent: 4564909 (1986-01-01), Kramer
patent: 4578039 (1986-03-01), Hall
patent: 4681055 (1987-07-01), Cyr
patent: 4933617 (1990-06-01), Huber et al.
patent: 5057043 (1991-10-01), Sugimoto et al.
patent: 5172324 (1992-12-01), Knight
patent: 5235927 (1993-08-01), Singh et al.
patent: 5240445 (1993-08-01), Aoki et al.
patent: 5244426 (1993-09-01), Miyashita et al.
Ford Douglas W.
Juve Eric K.
Nautamatic Marine Systems
Sotelo Jesus D.
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