Linear servoactuator with integrated transformer position sensor

Details Linear servoactuator with integrated transformer position sensor Linear servoactuator with integrated transformer position sensor

1984-06-01

1986-12-09

Ruggiero, Joseph

Boots, shoes, and leggings

91361, 91459, 318599, 318657, 364183, 364510, G05B 1128, F15B 1316

Patent

active

046284990

ABSTRACT:
A linear servoactuator including an integrated split-secondary differential transformer position sensor and a fluid driven linear actuator controlled by solenoid poppet valves. Signals from the position sensor transformer are digitized and linearized by a control microcomputer by using digitized transformer signals as addresses for a programmable read only memory. The linearized output is compared to a command position to determine an error value. When the error reaches a predetermined magnitude, indicating that the actuator is approaching the command position, solenoid poppet valves are actuated by a pulse-width modulated signal from the microcomputer to progressively decrease the fluid flow to the actuator for deceleration.

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Burleigh et al., "Hydraulic Fluid Power Components for Microprocessor Control" Design News, 2/20/84.
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