Steering system
First Claim
1. A steering system comprising:
- a controlled element which is movable in a neutral area and in areas on opposite sides outside of the neutral area based on a steering input, the neutral area comprising an area between a first position and a second position, the first position being on an opposite side of a neutral position than the second position;
a handle for controlling the position of the controlled element, the handle being movable between set-points in a centre zone corresponding to the controlled element'"'"'s neutral area, the centre zone comprising an area between a first set-point and a second set-point, the first set-point being on an opposite side of a centre set-point than the second set-point; and
a steering unit arranged to receive set-points from the handle, and to move the controlled element to a corresponding position, the steering unit selecting between a fast down-ramp speed and a slow down-ramp speed by which the controlled element is moved in the neutral area towards the neutral position,wherein when the handle is moved on opposite sides outside of the centre zone toward the centre set-point, the steering unit controls the controlled element to move on opposite sides outside of the neutral area toward the neutral position at the fast down-ramp speed,wherein when the handle is moved in the centre zone to the centre set-point, the steering unit controls the controlled element to move in the neutral area to the neutral position at the slow down-ramp speed; and
wherein when the handle is moved from a position on one side outside of the centre zone to a position on the opposite side outside of the centre zone, the steering unit controls the controlled element to move through the neutral area at a constant fast ramp-down speed; and
wherein the slow down-ramp speed is slower than the fast down-ramp speed.
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Accused Products
Abstract
The invention provides a steering system comprising a controlled element which is movable in a neutral area comprising a neutral position and in areas on opposite sides of the neutral area based on a steering input and a handle for requesting a desired position for the controlled element. The handle is movable between set-points in a center zone comprising a center set-point and set-points on opposite sides of the center zone. Furthermore, a steering unit is arranged to receive set-points from the handle, to determine a corresponding controlled position of the controlled element, and to move the controlled element to said controlled position. In order to prevent or reduce jerks, the steering unit is adapted to vary a speed by which the controlled element is moved to the controlled position. The speed is variable in dependence of the received set-point.
11 Citations
11 Claims
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1. A steering system comprising:
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a controlled element which is movable in a neutral area and in areas on opposite sides outside of the neutral area based on a steering input, the neutral area comprising an area between a first position and a second position, the first position being on an opposite side of a neutral position than the second position; a handle for controlling the position of the controlled element, the handle being movable between set-points in a centre zone corresponding to the controlled element'"'"'s neutral area, the centre zone comprising an area between a first set-point and a second set-point, the first set-point being on an opposite side of a centre set-point than the second set-point; and a steering unit arranged to receive set-points from the handle, and to move the controlled element to a corresponding position, the steering unit selecting between a fast down-ramp speed and a slow down-ramp speed by which the controlled element is moved in the neutral area towards the neutral position, wherein when the handle is moved on opposite sides outside of the centre zone toward the centre set-point, the steering unit controls the controlled element to move on opposite sides outside of the neutral area toward the neutral position at the fast down-ramp speed, wherein when the handle is moved in the centre zone to the centre set-point, the steering unit controls the controlled element to move in the neutral area to the neutral position at the slow down-ramp speed; and wherein when the handle is moved from a position on one side outside of the centre zone to a position on the opposite side outside of the centre zone, the steering unit controls the controlled element to move through the neutral area at a constant fast ramp-down speed; and wherein the slow down-ramp speed is slower than the fast down-ramp speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification