Path planning
First Claim
1. A method of computing the path of a motor vehicle along a two-dimensional plane required to control the motion of the motor vehicle by means of a driver-assisting system, comprising:
- providing a path connecting an initial state with a terminal state wherein each of states Zi=[xi, yi, ψ
i, ci] along the path is characterized by four state coordinates with xi and yi being the Cartesian coordinates of a point Pi, ψ
i being the direction angle of the tangent, and ci being the curvature of the path at point Pi;
assembling the path from a number of elementary paths joining at junction points JPi such that the four state coordinates of state Zi have a continuous transition in the junction points JPi;
assigning the path at least one isosceles planar triangle with vertices Δ
(P0, P3, P5), where P0 is the starting position and P3 is terminal position of at least a section of the path;
determining where point P5 is located opposite the base of the planar triangle P0P3| by the intersection of the two legs P0P5 and P5P3 of the planar triangle such that the two legs P0P5, P5P3, are of the same length and, together with side P0P3| of the planar triangle, form the same vertical angle ψ
i, with angle ψ
i at vertex P0 of the planar triangle by the angle formed by the tangent of the path and side P0P3| of the triangle;
determining the parameters of the elementary paths by the parameters of the planar triangle; and
signaling a control setting of a vehicle steering mechanism according to said determinations.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to a method of determining the path of a vehicle along a two-dimensional plane intended to control the movement of the vehicle by means of a driver-assisting system, where the path interconnects an initial state and a terminal state and each of the states Zi=[xi, yi, ψi, ci] along the path is characterized by four state coordinates with xi and yi being the Cartesian coordinates of a point Pi, ψi being the direction angle of the tangent line, and ci being the curvature of the path at point Pi, and where the path is made up of a number of elementary paths meeting at junction points JPi such that the four state coordinates of state Zi are characterized by a continuous transition at the junction points JPi.
21 Citations
20 Claims
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1. A method of computing the path of a motor vehicle along a two-dimensional plane required to control the motion of the motor vehicle by means of a driver-assisting system, comprising:
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providing a path connecting an initial state with a terminal state wherein each of states Zi=[xi, yi, ψ
i, ci] along the path is characterized by four state coordinates with xi and yi being the Cartesian coordinates of a point Pi, ψ
i being the direction angle of the tangent, and ci being the curvature of the path at point Pi;assembling the path from a number of elementary paths joining at junction points JPi such that the four state coordinates of state Zi have a continuous transition in the junction points JPi; assigning the path at least one isosceles planar triangle with vertices Δ
(P0, P3, P5), where P0 is the starting position and P3 is terminal position of at least a section of the path;determining where point P5 is located opposite the base of the planar triangle P0P3 | by the intersection of the two legsP0P5 andP5P3 of the planar triangle such that the two legsP0P5 ,P5P3 , are of the same length and, together with sideP0P3 | of the planar triangle, form the same vertical angle ψ
i, with angle ψ
i at vertex P0 of the planar triangle by the angle formed by the tangent of the path and sideP0P3 | of the triangle;determining the parameters of the elementary paths by the parameters of the planar triangle; and signaling a control setting of a vehicle steering mechanism according to said determinations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A processor configured to compute the path of a motor vehicle along a two-dimensional plane, comprising:
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said processor being configured to provide a path connecting an initial state with a terminal state wherein each of states Zi=[xi, yi, ψ
i, ci] along the path is characterized by four state coordinates with xi and yi being the Cartesian coordinates of a point Pi, ψ
i being the direction angle of the tangent, and ci being the curvature of the path at point Pi;said processor being further configured to assemble the path from a number of elementary paths joining at junction points JPi such that the four state coordinates of state Zi have a continuous transition in the junction points JPi; said processor being further configured to assign the path at least one isosceles planar triangle with vertices Δ
(P0, P3, P5), where P0 is the starting position and P3 is terminal position of at least a section of the path;said processor being further configured to determine where point P5 is located opposite the base of the planar triangle P0P3 | by the intersection of the two legsP0P5 andP5P3 of the planar triangle such that the two legsP0P5 ,P5P3 are of the same length and, together with sideP0P3 | of the planar triangle, form the same vertical angle ψ
i;said processor being further configured to determine angle ψ
i at vertex P0 of the planar triangle by the angle formed by the tangent of the path and sideP0P3 | of the triangle, such that the parameters of the elementary paths are determined by the parameters of the planar triangle; andsaid processor being further configured to signal to a vehicle steering mechanism a setting according to said determinations. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification