Method and device for predictive control of agricultural vehicle systems
First Claim
Patent Images
1. A method for controlling an agricultural vehicle system when moving along a course of travel over a field, the method comprising:
- providing a field model correlating a field characteristic to a specific location in the field,from the field model and at least one previously obtained value for the field characteristic, predicting a value for the field characteristic in front of the agricultural vehicle system thus obtaining an anticipated field characteristic, andcontrolling the agricultural vehicle system at least partly in response to the anticipated field characteristic,wherein providing the field model correlating a field characteristic to a specific location in the field includes assuming that field characteristic varies in a continuous manner by taking into account first and second order derivatives of the field model variables; and
wherein the previously obtained value for the field characteristic is from a location different than the location in front of the machine for which the value of the field characteristic is predicted.
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Abstract
A method for controlling an agricultural vehicle system when moving along a course of travel over a field
- providing a field model correlating a field characteristic, e.g. a farmland condition such as farmland slope, or a crop condition such as crop density or moisture, to a specific location in the field,
- from the field model and at least one previously obtained value for the field characteristic, predicting a value for the field characteristic in front of the agricultural vehicle system thus obtaining an anticipated field characteristic, and;
- controlling the agricultural vehicle system at least partly in response to the anticipated field characteristic.
96 Citations
13 Claims
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1. A method for controlling an agricultural vehicle system when moving along a course of travel over a field, the method comprising:
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providing a field model correlating a field characteristic to a specific location in the field, from the field model and at least one previously obtained value for the field characteristic, predicting a value for the field characteristic in front of the agricultural vehicle system thus obtaining an anticipated field characteristic, and controlling the agricultural vehicle system at least partly in response to the anticipated field characteristic, wherein providing the field model correlating a field characteristic to a specific location in the field includes assuming that field characteristic varies in a continuous manner by taking into account first and second order derivatives of the field model variables; and wherein the previously obtained value for the field characteristic is from a location different than the location in front of the machine for which the value of the field characteristic is predicted. - View Dependent Claims (6, 7, 8)
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2. A method for controlling an agricultural vehicle system when moving along a course of travel over a field the method comprising:
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providing a field model correlating a field characteristic to a specific location in the field, from the field model and at least one previously obtained value for the field characteristic, predicting a value for the field characteristic in front of the agricultural vehicle system thus obtaining an anticipated field characteristic, and controlling the agricultural vehicle system at least partly in response to the anticipated field characteristic, wherein providing the field model correlating a field characteristic to a specific location in the field includes assuming that field characteristic varies in a continuous manner by taking into account first and second order derivatives of the field model variables and optimizing a cost function that takes account of the difference between a model value and a measured value at a specific location, of the first derivatives in orthogonal directions of the model values and of the second derivatives in orthogonal directions of the model values.
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3. A method for controlling an agricultural vehicle system when moving along a course of travel over a field, the method comprising:
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providing a field model correlating a field characteristic to a specific location in the field, from the field model and at least one previously obtained value for the field characteristic, predicting a value for the field characteristic in front of the agricultural vehicle system thus obtaining an anticipated field characteristic, and controlling the agricultural vehicle system at least partly in response to the anticipated field characteristic, wherein providing the field model correlating a field characteristic to a specific location in the field includes assuming that field characteristic varies in a continuous manner by taking into account first and second order derivatives of the field model variables and summing a factor related to the squared difference between a model value and a measured value at a location in the field, a factor related to the squared first derivative in orthogonal directions of the model values and a factor related to the squared second derivatives in orthogonal directions of the model values. - View Dependent Claims (4)
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5. A method for controlling an agricultural vehicle system when moving along a course of travel over a field, the method comprising:
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providing a field model correlating a field characteristic to a specific location in the field, from the field model and at least one previously obtained value for the field characteristic, predicting a value for the field characteristic in front of the agricultural vehicle system thus obtaining an anticipated field characteristic, and controlling the agricultural vehicle system at least partly in response to the anticipated field characteristic, wherein providing the field model correlating a field characteristic to a specific location in the field includes assuming that field characteristic varies in a continuous manner by taking into account first and second order derivatives of the field model variables; and wherein predicting the value for the field characteristic in front of the agricultural vehicle system includes calculating field characteristic values in a region around a current location of the agricultural vehicle system determined by a span not larger than 6 columns of known values.
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9. An agricultural vehicle system comprising
a control system configured to generate a control signal from a predicted value for a field characteristic in front of an agricultural vehicle, the predicted value being calculated by the control system from a field model correlating the field characteristic to a specific location in the field and at least one previously obtained value for the field characteristic, wherein the field model assumes that the field characteristic varies in a continuous manner; - and
wherein the previously obtained value for the field characteristic is from a location different than the location in front of the agricultural vehicle for which the value of the field characteristic is predicted. - View Dependent Claims (10, 11, 12, 13)
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Specification