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US 12,540,684 B2Granted
Method for operating a fluid system and fluid system
AssigneeFesto AG & Co.
InventorsDaniel Klassen, Jan Gröber, Valentin Falkenhahn
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AssigneeFesto AG & Co.
InventorsDaniel Klassen, Jan Gröber, Valentin Falkenhahn
Estimating the term…
A method for operating a fluid system, which has a control device with a control functionality and a piezoelectric valve assembly that can be controlled by the control device. The method involves the following steps: providing a target working pressure at the working connection, measurement of the actual working pressure at the working connection by the pressure sensor, transmitting the measurement data to the control device and applying the algorithm to compare the actual working pressure with the target working pressure, activating the at least one integrator to integrate the control deviation of the control voltage (=offset voltage) after the actual working pressure is constant over a certain time period, and changing the control voltage as a function of the determined target/actual deviation taking into account the integrator operation.
A method for operating a fluid system, which has a control device with a control functionality and a piezoelectric valve assembly that can be controlled by the control device, wherein the piezoelectric valve assembly has an aeration port connected to a pressure source and a vent port connected to a pressure sink, wherein the piezoelectric valve assembly has at least one aeration valve formed as a piezoelectric valve and connected to the aeration port and at least one vent valve formed as a piezoelectric valve and connected to the vent port, wherein the at least one aeration valve and the at least one vent valve are respectively connected to at least one working connection connected to a working chamber of a fluid consumer, and wherein the at least one aeration valve and the at least one vent valve respectively have at least one piezoelectric bending transducer, which in a closed position bears against a valve seat of the associated valve and closes a valve opening in a fluid-tight manner and which can be moved into open positions lifted to different extents from the valve seat as a function of an applied control voltage, wherein the aeration port and the at least one working connection are respectively connected to a pressure sensor coupled to the control device, and wherein the control device has an algorithm with at least one implemented integrator, the method having the following steps:
A fluid system for operating a fluid consumer, having a control device with a control functionality and a piezoelectric valve assembly that can be controlled by the control device, wherein the piezoelectric valve assembly has an aeration port connected to a pressure source and a vent port connected to a pressure sink, wherein the piezoelectric valve assembly has at least one aeration valve formed as a piezoelectric valve and connected to the aeration port and at least one vent valve formed as a piezoelectric valve and connected to the vent port, wherein the at least one aeration and the at least one vent valve are respectively connected to at least one working connection connected to a working chamber of the fluid consumer, and wherein the at least one aeration and the at least one vent valve respectively have at least one piezoelectric bending transducer, which in a closed position bears against a valve seat of the associated valve and closes a valve opening in a fluid-tight manner and which can be moved into open positions lifted to different extents from the valve seat as a function of an applied control voltage, wherein the aeration port and the at least one working connection are respectively connected to a pressure sensor coupled to the control device, and wherein the control device has an algorithm with at least one implemented integrator, and wherein the control device is designed to carry out a comparison of an actual working pressure with an target working pressure from a provided target working pressure at the at least one working connection and from a measurement of the actual working pressure at the at least one working connection by the pressure sensor, wherein the at least one implemented integrator can be activated to integrate a control deviation of the applied control voltage after the actual working pressure is constant over a certain time period and wherein the applied control voltage can be changed as a function of a determined target/actual deviation taking into account operation of the at least one implemented integrator.
Dependencies are inferred from the claim text.