Auto-tuning electro-hydraulic valve
AssigneeEaton Corporation
InventorsQingHui Yuan, Chris Schottler, Wade Gehlhoff, Hong Singhania
Life of this patent
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Abstract
A flow control valve includes a housing that includes a fluid inlet, a fluid outlet, a first work port and a second work port. The housing defines a spool bore and a pilot spool bore. A main stage spool is disposed in the spool bore. A pilot stage spool is disposed in the pilot spool bore. The pilot stage spool is in selective fluid communication with the main stage spool. A microprocessor includes a controller having a restricted structured controller and a compensation controller. Outputs of the restricted structured controller and the compensation controller are summed to form an electrical signal that is communicated to the pilot stage spool.
Claims7
A method for optimizing a plurality of gains of a microprocessor including a controller, the method comprising:
- defining a first gain of a control parameter;
- defining a second gain of the control parameter, wherein the first and second gains and the control parameter are used by the controller to generate a command signal for a device;
- selecting a low point and a high point for the first gain;
- selecting a low point and a high point for the second gain;
- combining each of the low and high points of the first gain with each of the low and high points of the second gain;
- calculating, with the controller, an error between an actual system parameter of the device and a desired system parameter for each combination, wherein the actual system parameter is a function of the command signal;
- selecting the combination that yields the lowest error;
- utilizing values of the first and second gains of the selected combination in a subsequent iteration.
Dependencies are inferred from the claim text.