Digital servo valve system

Motors: expansible chamber type – Working member position feedback to motive fluid control – Electrical input and feedback signal means

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Details

91362, 91361, 91459, 13762546, 13762528, 25112904, F15B 903, F15B 909

Patent

active

049515497

ABSTRACT:
A novel digital servo valve system for use in displacing an actuator is capable of operating either in closed or open loop mode. The system includes a controller that compares computed values of actuator parameters with preselected parameter values and iteratively determines therefrom command signals for the servo valve. The servo valve is characterized by a ball screw mechanism that eliminates mechanical backlash and a torsion bar which increases radial and angular compliance. A servo valve provided according to the present invention also displays reduced flow forces using a simple, inexpensive valve body in combination with a uniquely configured displaceable spool.

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