Method of calibrating and steering a vehicle provided with a positioning system
First Claim
1. A method of calibrating a steering system for a vehicle, the system comprising an actuator arranged to move a steered element, a sensor for determining a position value representing a position of the steered element, and a positioning system for determining a curvature-value representing a curvature of a path followed by the vehicle, the method comprising the steps of:
- establishing a first record comprising a position value representing a first position of the steered element and a curvature value determined during movement of the vehicle with the steered element in the first position,establishing a second record comprising a position value representing a second position of the steered element and a curvature value determined during movement of the vehicle with the steered element in the second position.
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Accused Products
Abstract
The invention provides a method of calibrating a steering system for a vehicle, e.g. an off-highway machinery, to allow automatic steering based on input from a position or tracking system, e.g. based on a Global Positioning System (GPS). At least two records, each comprising a position value and a curvature value are established. The position value represents a position of the steered element, e.g. a position of a steered wheel of the vehicle, and the curvature value could e.g. be expressed as a radius of a curve followed by the vehicle with that position of the steered element. The curvature value is determined by the positioning system during movement of the vehicle. Due to the records, it is easy to calibrate or recalibrate the system and the invention is therefore applicable e.g. in connection with manufacturing of vehicles in small batch numbers, e.g. for one of a kind production or for retrofitting of steering components to existing vehicles. The invention further provides a method of operating the vehicle and a steering system incorporating the above mentioned calibration method.
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Citations
10 Claims
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1. A method of calibrating a steering system for a vehicle, the system comprising an actuator arranged to move a steered element, a sensor for determining a position value representing a position of the steered element, and a positioning system for determining a curvature-value representing a curvature of a path followed by the vehicle, the method comprising the steps of:
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establishing a first record comprising a position value representing a first position of the steered element and a curvature value determined during movement of the vehicle with the steered element in the first position, establishing a second record comprising a position value representing a second position of the steered element and a curvature value determined during movement of the vehicle with the steered element in the second position. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A steering system for a vehicle, the system comprising:
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an actuator arranged to move a steered element of the vehicle, a sensor for determining a position value representative of a position of the steered element, a positioning system capable of generating a curvature value representing a curvature of a path followed by the vehicle, and data storage and processing means adapted to generate a record with a position value for a position of the steered element and a curvature value which is subsequently received from the positioning system while the vehicle is moved with the steered element in that position. - View Dependent Claims (8, 9, 10)
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Specification