Driving assist apparatus and method for vehicle
First Claim
1. A driving assist apparatus for a vehicle comprising:
- a detecting portion that detects a deflection angle that is an angle formed between a direction of the vehicle at a present position and a direction of the vehicle at a target position;
a setting portion that sets a basic path that extends until the deflection angle is changed to a state of 0 by steering the vehicle at a predetermined steering rate;
a computing portion that computes a target path that extends from the present position to the target position based on the basic path;
a driving assist portion that performs a driving assist by using the target path; and
a transforming portion that re-calculates a basic path during the driving assist, and that determines whether it is possible to set a path that reaches the target position through similarity transformation of the basic path based on a relationship between the present position of the vehicle and the target position of the vehicle, and that, if it is possible to set a path, re-sets a path that reaches the target position through similarity transformation.
1 Assignment
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Accused Products
Abstract
A driving assist apparatus for a vehicle which calculates a path by an algorithm suitable for real-time path calculation in a vehicle-installed computing device is provided. A basic path that changes the deflection angle of the vehicle to 0 is computed from an initial vehicle position. From the basic path, a target path is computed, for example, by adding straight-line paths to the two opposite ends of the basic path. On the basis of the target path, a driving assist is performed. During the driving assist, a basic path is re-calculated. If it is determined that a similarity-enlarged path obtained through similarity enlargement of the basic path can be used to reach the target position point, a target path is re-set on the basis of the similarity-enlarged path. Then a driving assist is performed on the basis of the re-set target path.
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Citations
25 Claims
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1. A driving assist apparatus for a vehicle comprising:
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a detecting portion that detects a deflection angle that is an angle formed between a direction of the vehicle at a present position and a direction of the vehicle at a target position; a setting portion that sets a basic path that extends until the deflection angle is changed to a state of 0 by steering the vehicle at a predetermined steering rate; a computing portion that computes a target path that extends from the present position to the target position based on the basic path; a driving assist portion that performs a driving assist by using the target path; and a transforming portion that re-calculates a basic path during the driving assist, and that determines whether it is possible to set a path that reaches the target position through similarity transformation of the basic path based on a relationship between the present position of the vehicle and the target position of the vehicle, and that, if it is possible to set a path, re-sets a path that reaches the target position through similarity transformation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A driving assist method for a vehicle comprising the steps of:
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detecting a deflection angle that is an angle formed between a direction of the vehicle at a present position and a direction of the vehicle at a target position; setting a basic path that extends until the deflection angle is changed to a state of 0 by steering the vehicle at a predetermined steering rate; computing a target path that extends from the present position to the target position based on the basic path; performing a driving assist by using the target path; and re-calculating a basic path during the driving assist, and checking whether it is possible to set a path that reaches the target position through similarity transformation of the basic path based on a relationship between the present position of the vehicle and the target position of the vehicle, and re-setting a path that reaches the target position through similarity transformation if it is possible to set a path. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A driving assist apparatus for a vehicle comprising:
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detecting means for detecting a deflection angle that is an angle formed between a direction of the vehicle at a present position and a direction of the vehicle at a target position; setting means for setting a basic path that extends until the deflection angle is changed to a state of 0 by steering the vehicle at a predetermined steering rate; computing means for computing a target path that extends from the present position to the target position based on the basic path; driving assist means for executing a driving assist by using the target path; and transforming means for re-calculating a basic path during the driving assist, and for determining whether it is possible to set a path that reaches the target position through similarity transformation of the basic path based on a relationship between the present position of the vehicle and the target position of the vehicle, and for, if it is possible to set a path, re-setting a path that reaches the target position through similarity transformation.
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Specification