Accession Number : ADD016401

Title :   Modular Hydraulic Control System.

Descriptive Note : Patent, Filed 30 Sep 92, patented 21 Jun 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Winyard, David C ; Lindstrom, Waldemar C

Report Date : 21 Jun 1994

Pagination or Media Count : 14

Abstract : A system of modular electrohydraulic servovalves is centrally controlled and may be used to control the operation of critical hydraulic actuators. A programmable controller operates a group of modular servovalves which each deliver a portion of the total actuator fluid requirements. The flow rate, valve position, and valve pressure of each servovalve is monitored by the controller and compared to expected values in memory to determine whether a servovalve malfunction exists. If so, the controller maintains the required flow rate to the actuator by closing the malfunctioning valve and either activating a spare or proportionally increasing the flow rates of the remaining servovalves to compensate for the loss

Descriptors :   *HYDRAULIC ACTUATORS, *PATENTS, CONTROL, FLOW, FLOW RATE, FLUIDS, MALFUNCTIONS, OPERATION, PRESSURE, RATES, REQUIREMENTS, SERVOVALVES, VALUE, VALVES

Subject Categories : Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE