专利名称：Velocity based method for controlling a
hydraulic system
发明人：Keith A. Tabor申请号：US10780592申请日：20040218公开号：US06951102B2公开日：20051004
专利附图：
摘要：A hydraulic circuit branch includes a hydraulic actuator, such as a cylinder, and anassembly of one or more electrohydraulic proportional valves connected in seriesbetween a pressurized fluid supply line and a tank return line. The force acting on the
hydraulic actuator is determined by sensing fluid pressures produced by the hydraulicactuator. Pressures in the supply and tank return lines also are sensed. The sensedpressures and a desired velocity for the hydraulic actuator are employed to determine anequivalent flow coefficient, which characterizes fluid flow through the hydraulic circuitbranch, either a conduction or restriction coefficient may be derived. The equivalent flowcoefficient is used to determine how to activate each electrohydraulic proportional valveto achieve the desired velocity of the hydraulic actuator. The equivalent flow coefficientalso is employed to control the pressure levels in the supply and tank return lines.
申请人：Keith A. Tabor
地址：Richfield WI US
国籍：US
代理机构：Quarles & Brady LLP
代理人：George E. Haas
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