Siemens Product Lifecycle Management Software Inc.

Yanong Zhu

Douglas Joseph King

Howard Charles Duncan Mattson

Feng Yu

Michael Rebrukh

Neil James Foston

Methods for product data management and corresponding systems and computer-readable mediums. A method includes receiving a geometric model including plurality of entities and receiving existing conditions corresponding to the geometric model. The method includes receiving an operation to be performed on a selected entity of the geometric model. The method includes propagating through the geometric model from the selected entity to other entities of the geometric model, according to the existing conditions, and adding the selected entities and the other entities to a variational system. The method includes performing a variational solve of the variational system according to the operation to produce modified entities and applying the modified entities to the geometric model to produce an edited geometric model.

Curves in a variational system

Methods for product data management and corresponding systems and computer-readable mediums. A method includes receiving a three-dimensional CAD model in the data processing system, the CAD model including a plurality of geometries. The method includes identifying equivalence relationships between multiple ones of the geometries and receiving at least one Relationship Implication (RI) definition. Each RI definition defines a relationship implication according to a plurality of the geometries and at least one type of the equivalence relationships. The method includes applying each RI definition to the geometries to produce groups of geometries corresponding to each RI definition and selecting a representative geometry for each group. The method includes filtering out geometric relationships for each geometry in each group other than the representative geometry and manipulating the CAD model without the filtered-out geometric relationships.

Identification and management of redundancy within geometric relationships

Methods for CAD editing and corresponding systems and computer-readable mediums. A method includes receiving a CAD model including a plurality of entities and receiving a user input including a selection of at least one entity and a movement of the selected entity. The method includes applying any basic condition behaviors that correspond to the user input and applying any optional condition behaviors that correspond to the user input. The method includes building a variational system to be solved based on the user input, any applied basic condition behaviors, and any optional condition behaviors. The method includes performing a variational solve on the variational system to produce an edited CAD model and storing the edited CAD model.

Local behavior in a variational system

Systems and methods for identifying symmetry relationships in product data management (PDM) systems. A method includes receiving a 3D model including a plurality of components and identifying a plurality of target components from the plurality of components. The method includes identifying a symmetry plane in the 3D model and determining the location of each of the target components with respect to the symmetry plane. The method includes adding the target components to respective groups according to the determined locations, and creating an equivalence class for each group of target components. The method includes storing a symmetry relationship between the created equivalence classes.

Symmetry of discovered geometric relationships in a three dimensional model

Systems and methods for maintaining equivalence relations in product data management (PDM) systems. A method includes receiving a 3D model including a plurality of components, and receiving a selection of one of the plurality of components of the model. The method includes receiving a selection of at least one equivalence relation to be discovered in the 3D model and identifying at least one target component of the plurality of components of the model. The method includes completing the selected component with respect to each target component according to each selected equivalence relation. The method includes building and storing an equivalence relationship graph according to the completed selected component.

Representation and discovery of geometric relationships in a three dimensional model

Methods for product data management and corresponding systems and computer-readable mediums. A method includes receiving a three-dimensional CAD model in the data processing system, the CAD model including a plurality of geometries. The method includes receiving at least one system-found equivalence class (EC) including at least one of the geometries, the system-found EC being of a specified EC type, and receiving at least one persistent EC of the specified EC type including at least one of the geometries. The method includes completing any unique persistent member of the persistent EC by finding any other geometries in the CAD model that have an EC relationship with the unique persistent member of the specified EC type. The method includes expanding the user-defined persistent EC by adding any unique found members of the specified EC type to produce a combined EC, and storing and reusing the combined EC.

Growing community of inventors

Cambridge, United Kingdom

Yanong Zhu