Movement route generating apparatus and movement route generating method
First Claim
1. A movement route generating apparatus comprising:
- an angle calculating unit that calculates an angle formed by a direction in which a vehicle at a target position travels compared with a direction in which the vehicle at a current position travels;
a graph generating unit that generates a graph that has most gentle inclinations, each inclination indicating a degree of change in curvature per unit distance traveled, by plotting a curvature of a travel trajectory matching a steering angle of the vehicle and a distance traveled by the vehicle on two axes, under conditions that an area of a graph generated in correspondence to a travel trajectory from the current position to the target position is equal to the angle calculated by the angle calculating unit, and a maximum curvature of a travel trajectory due to a maximum steering angle that the vehicle is capable of controlling is an upper limit; and
a route setting unit that sets, as a movement route of the vehicle, a travel trajectory represented by the graph generated by the graph generating unit.
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Abstract
A movement route generating apparatus includes an angle calculating unit calculating an angle formed by a vehicle travel direction at a target position compared with that at the current position, a graph generating unit generating a graph that has most gentle inclinations by plotting the curvature of a travel trajectory matching the steering angle of the vehicle and a distance traveled on two axes, under the condition that the area of a graph generated in correspondence to a travel trajectory from the current position to the target position is equal to the angle and other conditions, and a route setting unit setting a travel trajectory represented by the graph as the movement route of the vehicle. Accordingly, a travel trajectory with the smallest degree of change in curvature per unit distance traveled, that is, a low horizontal angular velocity caused by vehicle steering, can be set as a movement route.
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Citations
20 Claims
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1. A movement route generating apparatus comprising:
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an angle calculating unit that calculates an angle formed by a direction in which a vehicle at a target position travels compared with a direction in which the vehicle at a current position travels; a graph generating unit that generates a graph that has most gentle inclinations, each inclination indicating a degree of change in curvature per unit distance traveled, by plotting a curvature of a travel trajectory matching a steering angle of the vehicle and a distance traveled by the vehicle on two axes, under conditions that an area of a graph generated in correspondence to a travel trajectory from the current position to the target position is equal to the angle calculated by the angle calculating unit, and a maximum curvature of a travel trajectory due to a maximum steering angle that the vehicle is capable of controlling is an upper limit; and a route setting unit that sets, as a movement route of the vehicle, a travel trajectory represented by the graph generated by the graph generating unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A movement route generating method comprising:
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a first step in which an angle calculating unit in a movement route generating apparatus calculates an angle formed by a direction in which a vehicle at a target position travels compared with a direction in which the vehicle at a current position travels; a second step in which a graph generating unit in the movement route generating apparatus generates a graph that has most gentle inclinations, each inclination indicating a degree of change in curvature per unit distance traveled, by plotting a curvature of a travel trajectory matching a steering angle of the vehicle and a distance traveled by the vehicle on two axes, under conditions that an area of a graph generated in correspondence to a travel trajectory from the current position to the target position is equal to the angle calculated by the angle calculating unit, and a maximum curvature of a travel trajectory due to a maximum steering angle that the vehicle is capable of controlling is an upper limit; and a third step in which a route setting unit in the movement route generating apparatus sets, as a movement route of the vehicle, a travel trajectory represented by the graph generated by the graph generating unit. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification