Output correcting method in control system, control system, and hydraulic pump control system
First Claim
1. An output correcting method in a control system wherein a reverse characteristic having a reverse input/output relationship to a target input/output characteristic of a control object, is preset, and a target value for an output of the control object is calculated, and then a command signal corresponding to the target value is determined based on the preset reverse characteristic, and the command signal is output to said control object, said method comprising:
- a first step of calculating a command signal corresponding to a given target value for the output of said control object based on said preset reverse characteristic, outputting the command signal to said control object, measuring an output of said control object and estimating a deviation between an actual input/output characteristic of said control object and said target input/output characteristic therefor, and storing data on the deviation between the input/output characteristics as learning correction data, anda second step of reading out the stored learning correction data and correcting the command signal using the learning correction data.
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Accused Products
Abstract
A control system wherein a reverse characteristic having a reverse input/output relationship to a target input/output characteristic of a control object, is preset, and a target value for an output of the control object is calculated. A command signal corresponding to the target value then is determined based on the preset reverse characteristic, and the command signal is output to the control object. The control system includes first means for calculating a command signal corresponding to a given target value for the output of the control object based on the preset reverse characteristic, outputting the command signal to the control object, measuring an output of the control object and estimating a deviation between an actual input/output characteristic of the control object and the target input/output characteristic therefor, and storing data on the deviation between the input/output characteristics as learning correction data. The control system further includes second means for reading out the stored learning correction data and correcting the command signal using the learning correction data.
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Citations
18 Claims
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1. An output correcting method in a control system wherein a reverse characteristic having a reverse input/output relationship to a target input/output characteristic of a control object, is preset, and a target value for an output of the control object is calculated, and then a command signal corresponding to the target value is determined based on the preset reverse characteristic, and the command signal is output to said control object, said method comprising:
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a first step of calculating a command signal corresponding to a given target value for the output of said control object based on said preset reverse characteristic, outputting the command signal to said control object, measuring an output of said control object and estimating a deviation between an actual input/output characteristic of said control object and said target input/output characteristic therefor, and storing data on the deviation between the input/output characteristics as learning correction data, and a second step of reading out the stored learning correction data and correcting the command signal using the learning correction data.
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2. A control system wherein a reverse characteristic having a reverse input/output relationship to a target input/output characteristic of a control object, is preset, and a target value for an output of the control object is calculated, and then a command signal corresponding to the target value is determined based on the preset reverse characteristic, and the command signal is output to said control object, said control system comprising:
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first means for calculating a command signal corresponding to a given target value for the output of said control object based on said preset reverse characteristic, outputting the command signal to said control object, measuring an output of said control object and estimating a deviation between an actual input/output characteristic of said control object and said target input/output characteristic therefor, and storing data on the deviation between the input/output characteristics as learning correction data, and second means for reading out the stored learning correction data and correcting the command signal using the learning correction data. - View Dependent Claims (3, 4, 5, 6, 7)
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8. A hydraulic pump control system wherein a reverse characteristic having a reverse input/output relationship to a target input/output characteristic of displacement control means for a variable displacement hydraulic pump, is preset, and a target displacement as a target value for an output of said displacement control means is calculated, and then a command signal corresponding to the calculated displacement is determined based on the preset reverse characteristic, and the command signal is output to said displacement control means for controlling the displacement of said hydraulic pump, said control system comprising:
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measuring means for measuring an actual displacement of said hydraulic pump, mode selecting means for selecting one of a learning control mode and a normal control mode, learning calculation means for, upon the learning control mode being selected by said mode selecting means, calculating a command signal corresponding to a given target displacement based on said preset reverse characteristic, outputting the command signal to said displacement control means, measuring an actual displacement of said hydraulic pump by said measuring means, calculating a difference between said given target displacement and the actual displacement and storing data on the deviation as learning correction data, and learning correction means for, upon the normal control mode being selected by said mode selecting means, reading out the stored learning correction data and correcting said command signal using the learning correction data. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification