Passification of an Electrohydraulic Two-stage Pressure Control Servo-valve
نویسندگان
چکیده
Passive systems have the beneficial property that their interconnections with other passive systems result in necessarily stable systems. This vmue of passive systems can be exploited with hydraulic systems to build owerful machines that are safe and human friendly. A digculty in a plying the passivity concept to electrohydraulic systems is i a t they are not intnnsically passive. In a previous paper, passification techniques were developed to render single-stage directional control valves as passive two-port devices with a supply rate related to the wer in ut at the hydraulic port. In this paper, we extend passiffcation technique to two stage pressure control servo-valves. The assified two-stage valve avoids the flow rate and bandwidthyimitations that exist for single-stage valves.
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