buda University John von Neumann Faculty of Informatics
Óbuda University John von Neumann Faculty of Informatics Institute of Applied Mathematics Master in Engineering Informatics and Applied Mathematics Course System Level Modeling for Cyber-Physical Engineering Structures in the Cloud Lecture and laboratory No. 02 Engineering modeling basics Dr. László Horváth http: //users. nik. uni-obuda. hu/lhorvath/
This presentation is intellectual property. It is available only for students in my courses. The screen shots in this presentation were made in the CATIA V 5 and the V 6 PLM systems as well as the 3 DEXPERIENCE platform at the Laboratory of Intelligent Engineering systems, in the course of active modeling process. The CATIA V 5 és V 6 PLM systems as well as the 3 DEXPERIENCE platform are operated at the above laboratory with the support of Dassult Systémes Inc. and CAD-Terv Ltd. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Contents Lecture Industry 4. 0 – Cyber-Physical Systems and disciplines Functional and logical concept model Behavior Modeling capabilities Object, feature, context Coordinate systems and transformations Shape representation. Laboratory task Slm_CS_02 case study Analysis and understanding case study in thematic model for the issues of the lecture. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Industry 4. 0 – Cyber-Physical System László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Systems and disciplines Highly engineered multidisciplinary Products Product behavior analysis on product concept level Discipline independent model of product concept is required Product must be modeled as a system Definition of product in RFLP model structure from systems engineering (SE) Active knowledge driven generic product model Model modifies itself for changed situation and new events through chains of contextually connected feature parameters. László Horváth UÓ-JNFI-IAM Collaborating systems operate the product. Cyber-physical-biological system. http: //users. nik. uni-obuda. hu/lhorvath/
Functional and logical concept model Requirements the product has to fulfill Function To fulfill its requirements Logical Structure of logical components. Physical Representations of real world product. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Behavior Example: Functional behaviors of solid form features. Protected Feature Material cannot penetrate the protected volume. Core Feature A spatial volume replaces material volume only where the core feature intersects feature within the same body. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Modeling capabilities Example of simulation Simulation of product behavior in case of realistic applications. Definition of actions for definition, execution, and evaluation simulations. Simulation features as building blocks of simulation definitions. Definition and application of materials. Evaluation of simulation results. FEM/FEA in the background. Multiphysics simulation. Multiphysics Simulation On Cloud ”A complete suite of features for solving multiphysics problems involving linear and nonlinear solids, fluids, heat transfer, acoustics, vibration, low-frequency electromagnetics, electrostatics, and coupled behavior between these multiply physical responses. ” Dassault Systémes http: //www. 3 ds. com/productsservices/3 dexperience/on-cloud/ László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Object, feature, context General information schema Model information schema Object Feature Class (in taxonomy) Paramaters Relationships (contexts) Procedures Properties Type with parameters Representation. In case of shape feature, topology structured geometry. Contextual chain for propagation of parameter changes. Contextual connection Parameter Model must be contextually consistent. Real-time monitoring and simulation prevent the creation of erroneous results. László Horváth UÓ-JNFI-IAM Feature driven model: feature acts on previously defined features though contextual connections of its parameters. http: //users. nik. uni-obuda. hu/lhorvath/
System of contexts László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Coordinate systems and transformations László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Shape representation V - vertex E – edge (coedge) Curve mapped to edge Closed chain of edges F - face Shell+material=body Surface mapped to edge Body in this case = four lumps László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Analysis and understanding case study in thematic model for the issues of the lecture. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Sequence of shape model modification features Dynamic navigator assists by actual choice of constraints. Constraints save the shape. László Horváth UÓ-JNFI-IAM Closed contour in a plane. Modeling use non uniform rational B-spline(NURBS) representation http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Closed contour consists of two dimensional elements. Closed contour is defined in a plane which has two dimensional coordinate system. Transformation between this and the world coordinate systems is done automatically László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Definition uses context with closed contour Sketch. 1. László Horváth UÓ-JNFI-IAM Solid of revolution is defined by its parameters. http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study The resulted form feature is boundary represented. Boundary geometry is represented by curves and their intersection curves. Structure of geometry is represented by Eulerian topology. László Horváth This plane is defined for reference purpose. It is contextual with one of main planes (blue) of the model coordinate system. It is not in the boundary and acts in the entire model space. The green rectangle is only a symbol. UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Surface is defined in the context of the two NURBS curves. These curves interpolate points as their contexts. Contextual chains are developed. Swept surface is defined in the three dimensional model coordinate system using a generator (profile) and a path (guide) curve. Spine function is served by the path curve László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Trimmed sector of Swept. 1 is built into the boundary as new surface. The formerly defined closed contour Sketch. 1 and Swept surface Sweep. 1 serve as contexts of the tabulated solid form feature Pad. 1. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study The context is the last modification form feature and the actual topological face on which the filleted closed edge chain is defined. Relevant surfaces are trimmed accordingly. László Horváth UÓ-JNFI-IAM A „simple” fillet results complex modification of bundary generating new surface which conttinuity with matng surfaces is realized as defined (tangency: first order geometric continuity) http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Increased value of the radius parameter resulted extension of fillet to save integrity of the boundary surface complex. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Hollowed solid shape is defined. It is generated between the boundary surface complex and its offset. Alternatively, solid shape can be generated between two offset surfaces. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Offset of a surface in boundary mapped to topological face Face. 3 is defined. This component in the boundary geometry is surface which acts as context. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Surface based solid form feature is defined between two offsets of the surface Offset. 1. The resulted solid is a new topological lump within the solid shape Part. Body. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study The new parameter Length. 1 is defined for the solid object. It serves as driving context of the solid object. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Offset of two elements in the closed contour Sketch. 1 is to be defined in the context of the new parameter Length. 1. For this purpose parameter Offset. 3 is defined within the constraints of Sketch 1. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study The contextual connection is defined by formula. The red color of object shows that the model includes information about its modification. However, the modificating formula is still not included in model. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Modification is refused by active simulations because it is not possible. Message is in the box. Full mathematics saved correctness of model. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Modification of model using modified formula was successful. Formula and its activeness are properties of the Offset. 13 parameter. Value of this parameter can not be modified directly any more. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study A new form feature needs a closed NURBS curve in the context of five points. Curve interpolates these points. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Curve Sketch. 6 and curve on surface Curve. 2 are contexts of the new form feature Rib. 1. This feature is generated between its boundary and offset of boundary. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Offset of the highlighted surface mapped to a face is defined. Modification of the solid model by this offset surface is done after Rib. 1. Formerly defined form features are modified by contexts in the boundary representation of Part. Body. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Offset. 2 has the Offset parameter. Its value is increased. This is possible because this parameter does not have contextual connection defined. However, model will gain proper self adaptive behavior only after definition of all necessary contexts. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Symmetrical one of the solid object is defined. Reference is the Offset. 2. Full value model is gained. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Offset. 2 is applied context for the definition of Thick. Surface. 2 This new form feaure is defined between two offsets of surface Offset. 2. This is a new lump in the topology. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study Hole. 1 is defined by its starting point and extension. Parameter value „Up to next” means that the task of the generation procedures is to extend hole to the surface which is mapped to the last topological face in the direction of axis. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study This corner surface (blue) was result of fillet surface generation. Its offset is defined. László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
Slm_CS_02 case study László Horváth UÓ-JNFI-IAM http: //users. nik. uni-obuda. hu/lhorvath/
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