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Path planning for autonomous driving

  • US 10,274,961 B2
  • Filed: 07/26/2017
  • Issued: 04/30/2019
  • Est. Priority Date: 07/26/2017
  • Status: Active Grant
First Claim
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1. A computer implemented method for finding a path for an autonomous driving system, comprising:

  • receiving, by a processor, a set of way points defining path segments between adjacent way points;

    formulating, by a processor, a baseline b-spline function of b-spline basis terms, the baseline b-spline function formulated as a function of the path segments, the baseline b-spline function having parametric coefficients associated with each of the b-spline basis terms;

    determining, by a processor, initial conditions to include an offset to a target path y0, a heading angle φ

    0, and initial curvature ρ

    0 at a time t equal to zero;

    determining, by a processor, boundary conditions to include an offset yf, a heading angle φ

    f, an initial curvature ρ

    f at t=tf, where tf and t0 are times at the start and end of a segment;

    solving, by a processor, the baseline b-spline function based on the initial conditions and the boundary conditions at each way point to provide second order parametric curve continuity;

    determining, by a processor, path data based on results of the solved baseline b-spline function; and

    controlling, by a processor, a path of the vehicle based on the path data.

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