Vehicle speed control device, method of determining target speed by using the device, and program executing the method
First Claim
1. A vehicle speed control device including a speed control section, the vehicle speed control device for controlling a speed of a vehicle within a control-executed zone by computing a target speed of the vehicle based on map information and a current location of the vehicle and by supplying the target speed to the speed control section, the vehicle speed control device comprising:
- a current location error estimation section for extracting area attribute information from the map information, for producing a location error probability distribution of the vehicle, based on the area attribute information, and for outputting the produced location error probability distribution as a target speed correction instruction, wherein the area attribute information indicates an attribute of the current location or of the control-executed zone;
a target speed calculation section for receiving the target speed correction instruction, for accessing preset data that shows an acceleration or a gradient of an acceleration which does not make a driver feel uncomfortable and that depends on the location error probability distribution and a distance between a destination and a speed change start point of the target speed, and for computing target speed values at nodes over the distance in such a way that the target speed values create a continuous curve; and
a speed control section for sensing a speed of a vehicle, and for controlling a driving torque of the vehicle so that the sensed speed traces the continuous curve composed of the target speed values.
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Accused Products
Abstract
The present invention relates to a vehicle speed control device for controlling a speed of a vehicle. The vehicle speed control device includes a current location error estimation section for extracting area attribute information from the map information, for producing a location error probability distribution, a target speed calculation section for receiving the target speed correction instruction, for accessing preset data that shows an acceleration or a gradient of an acceleration which allows a driver not to feel uncomfortable, and for computing target speed values at nodes over the distance in such a way that the target speed values create a continuous curve, and a speed control section for sensing a speed of a vehicle, and for controlling a driving torque of the vehicle so that the sensed speed traces the continuous curve composed of the target speed values.
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Citations
10 Claims
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1. A vehicle speed control device including a speed control section, the vehicle speed control device for controlling a speed of a vehicle within a control-executed zone by computing a target speed of the vehicle based on map information and a current location of the vehicle and by supplying the target speed to the speed control section, the vehicle speed control device comprising:
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a current location error estimation section for extracting area attribute information from the map information, for producing a location error probability distribution of the vehicle, based on the area attribute information, and for outputting the produced location error probability distribution as a target speed correction instruction, wherein the area attribute information indicates an attribute of the current location or of the control-executed zone;
a target speed calculation section for receiving the target speed correction instruction, for accessing preset data that shows an acceleration or a gradient of an acceleration which does not make a driver feel uncomfortable and that depends on the location error probability distribution and a distance between a destination and a speed change start point of the target speed, and for computing target speed values at nodes over the distance in such a way that the target speed values create a continuous curve; and
a speed control section for sensing a speed of a vehicle, and for controlling a driving torque of the vehicle so that the sensed speed traces the continuous curve composed of the target speed values. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of setting a target speed by using a vehicle speed control device, the vehicle speed control device including a memory unit and a computing unit, for controlling a speed of a vehicle within a control-executed zone by computing a target speed of the vehicle based on map information and a current location of the vehicle and by supplying the target speed to a speed control section, the method comprising:
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producing a location error probability distribution of the vehicle by using the computing unit, based on area attribute information contained in the map information, wherein the area attribute information indicates an attribute of the current location or of the control-executed zone;
outputting the location error probability distribution, reading preset data that shows an acceleration or a gradient of an acceleration which allows a driver not to feel uncomfortable and that depends on the location error probability distribution and a distance between a destination and a speed change start point of the target speed; and
computing target speed values at nodes over the distance by using the computing unit in such a way that the target speed values create a continuous curve. - View Dependent Claims (9, 10)
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Specification