Eddy current compensation
AssigneeGeneral Electric Company
InventorYuval Zur
Life of this patent
Estimating the term…
Abstract
A method of compensating for an eddy field according to measurements of the field. The method includes fitting the measurements of the field to a plurality of candidate models of the field. A stability value indicative of the stability of the fitted model to changes, is assigned to each of the fitted candidate models. A model is selected from the candidate models responsive to the stability values of the candidate models and the eddy fields are compensated responsive to the selected model.
Claims33
A method of compensating for an eddy field according to measurements of the field, comprising:
- fitting the measurements of the field to a plurality of candidate models of the field;
- assigning a stability value indicative of the stability of the fitted model to changes, to each of the fitted candidate models;
- selecting a model from the candidate models responsive to the stability values of the candidate models;
- and
- compensating for the eddy field responsive to the selected model.
A method of correcting the values of filter parameters of an eddy field compensation filter, comprising:
- measuring a residue eddy field, the measurements including values of the field and times at which the values were measured;
- fitting the measurements of the residue field to a model of the residue field, the residue-model being a linear function of differentials related to the filter parameters, wherein the residue-model includes at least one term linearly dependent on a time variable representing the measurement time;
- and
- correcting the values of the filter parameters responsive to the values of the differentials from the fitting.
A method of adjusting filter parameters of an eddy field compensation filter, comprising:
- measuring a residue eddy field;
- providing a residue-model for the measurements of the residue field, the residue model being a linear function of a plurality of adjustment parameters;
- performing a plurality of adjustment steps in which the measurements of the residue-field is fit to the residue-model by adjusting the values of fewer than all the adjustment parameters;
- and
- adjusting the filter parameters in the compensation filter responsive to the adjustment parameters.
Dependencies are inferred from the claim text.