Trim tab control

Details Trim tab control Trim tab control

2007-01-23

2008-12-23

Sotelo, Jesus D (Department: 3617)

Ships

Hull or hull adjunct employing fluid dynamic forces to...

Movably mounted hull portion or hull adjunct

Reexamination Certificate

active

07467596

ABSTRACT:
A trim tab control system determines current tab position based upon a feedback signal that represents incremental motion of the actuator drive motor. Prior to power down, the current tab position is stored in non-volatile memory, and is retrieved on power up. The control system characterizes the actuator during a learning function by driving the actuator between the upper and lower limit positions and counting the number of increments. The display of tab position is based upon the current tab position count and the number of increments in a full range of motion. Automatic up and down commands cause the actuator to be driven up or down until a stop command is received or a limit position is reached.

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“Lectrotab—Linear Devices Corporation Electromechanical Trim Lab Systems Company Overview”, from http://www.lectrotab.com/Company/company.htm, visited Feb. 14, 2006 (2 pages).
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