The Boeing Company

Jeffrey David Poskin

Paul Zack Thunemann

Troy Winfree

Adriana Willempje Blom-Schieber

Michael Drumheller

Craig S Bosma

Thomas Allen Hogan-SCHMIDT

A method is provided for detecting regions of high curvature on a curve. The method comprises receiving a curve function and automatically arc length parameterizing the curve function. The local average curvature over the arc length parameterized curve function is automatically computed. One or more regions where the local average curvature turns at least a predetermined angle over a given interval are automatically indicated. The indicated regions are then output.

Detection of high curvature regions on curves

A modeling system is provided which is configured to retrieve from the non-volatile memory the 3D virtual model of an object; define a domain of a parametric surface; project feature curves in the 3D virtual model into the domain of the parametric surface to generate a mapping based on the 3D virtual model and including a plurality of parametric curves; divide the plurality of parametric curves into horizontal and vertical feature curves; extend each of the horizontal feature and vertical feature curves; construct a horizontal interpolant connecting the extended horizontal feature curves; construct a vertical interpolant connecting the extended vertical feature curves; fit the horizontal and vertical interpolants as coordinates of a map to a new parametric domain; and compose the inverse of the map to the new parametric domain with the parametric surface to create a new parametric surface containing the feature curves as isoparametric curves.

Modeling system for 3D virtual model

A method of planning fiber paths for a composite ply of a composite layup includes determining a first unit vector field. The first unit vector field represents a first approximation of target directions to be followed by tow centerlines of the composite ply. The first unit vector field is determined based on a specified rosette direction, a surface approximation of a nonplanar contoured surface of an object to be formed, and a fiber angle distribution. The method also includes determining, based on specified angle deviation bounds and the first unit vector field, a second unit vector field. The second unit vector field represents a second approximation of the target directions. The second approximation has reduced in-plane curvature relative to the first approximation. The method further includes planning a fiber placement head path for forming the composite ply of the composite layup based on the second unit vector field.

Growing community of inventors

Kent, WA, United States of America

Jeffrey David Poskin