buda University John von Neumann Faculty of Informatics
Óbuda University John von Neumann Faculty of Informatics Institute of Applied Mathematics Course Introduction to virtual engineering Lecture and laboratory 1. Virtual engineering An outline of basic methods in virtual space 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 tis presentation was made in the CATIA V 5 and V 6 PLM systems the Laboratory of Intelligent Engineering systems, in real modeling process. The CATIA V 5 és V 6 PLM systems operate in the above laboratory by the help of Dassult Systémes Inc. and CAD-Terv Ltd. László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Contents Lecture Role of virtual systems in engineering Representation of physical world Product model and its components Area dependence of virtual spaces Laboratory Overlook an engineering virtual space (VE 1. 1) Functionality a complex engineering system (VE 1. 2) Contextual object definition (VE 1. 3) Product structure and its application at model changes (VE 1. 4) László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Role of virtual systems in engineering Physical world connections (Digitized information, equipment control program, data from sensors, data for rapid prototyping) Construction of product model Virtual prototype development. Model space comprising representation of elements, relationships, and interactions of product to be produced and operated in an environment Simulations and analyses to answer the question: How the product will behave in a given environment. Human interactions László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Developng methodology for representation of physical world Product model Procedures Drawing space (Documentation) Control of procedures Authorized, responsible humans Object space (model) Virtual space (intelligent model) It is based on processing of knowledge. Knowledge must be verified and accepted by company, project, product development, and individuals. Physical world connections (Digitized information, equipment control program, data from sensors, data for rapid prototyping) László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Representation of physical world – historical survey Integrated engineering in the old times (Manual) Representation cyber – physical – biological system Modeling multidisciplinary system Engineering separated into areas (Manual then computer aided) Concurrent engineering in early integrated systems (Computer aided …) Model representations in RFLP structure Product Lifecycle Management Physical level representation in virtual space László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Representation of physical world Early achievements Developing virtual technology Current virtual technology Definition in model space Full integration Product model for PLM Object model Model space parameters Requirement Object structurethe product has to fulfill Requirements Contextual definition Partial solutions CAD/CAM/CAE, etc. (70 -90’s) Product model STEP ISO 10303 (80 -90’s) Situation and event based Knowledge ware Form feature Boundary representation (90’s) László Horváth Object Function representations To fulfill its requirements Contextual connections Logical Structure of logical components. Active knowledge for situations and events Physical Representations of real world product. Abstraction levels in RFLP structure UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Definition in virtual space Creating and analysis of curve and surface. Solid with boundary representation. To be used in boundary of a solid shape. Structure of topological and geometrical entities. László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Definition in virtual space Two parts in the assembly space. Parts are not placed on each other László Horváth Parts are partially placed on each other by the Coincidence. 1 constraint. UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Definition in virtual space Finite element analysis. Definition of force on geometry László Horváth Visualization of results in the form of color range code. UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Definition in virtual space Curvature analysis Manikin on surfaces of a solid. for ergonomic analysis. László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Overlook of virtual engineering space (VES) Laboratory task VE 1. 1 Understanding virtual space and its characteristics. Placing shape objects in a virtual space. Understanding space and working plane. Navigation by space pilot. László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Functionality of a complex engineering system Laboratory task VE 1. 2 Groups of functions and their connection. Concluding elements and human control of a virtual space. László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Contextual object definition Laboratory task VE 1. 3 Model name in the PLM model base (for propagation): IN 00 Sxxxx 00 Course name László Horváth Year Semester S or F UÓ-JNFI-IAM Student identificator Exercise No. http: //nik. uni-obuda. hu/lhorvath/
Contextual object definition Laboratory task VE 1. 3 Definition of a tabulated solid object in the context of a closed spline curve. László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Contextual object definition Laboratory task VE 1. 3 László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Contextual object definition Laboratory task VE 1. 3 Application of the resulted tabulated solid as base feature. Modifying it by shell and fillet form features. Shell is based on solid between boundary and its offset while fillet is a new surface in the boundary László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Contextual object definition Laboratory task VE 1. 3 László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Contextual object definition Laboratory task VE 1. 3 Modification of a control point of the closed spline curve and recognition of contextual chain. László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Contextual object definition Laboratory task VE 1. 3 László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Contextual object definition Laboratory task VE 1. 3 On-site modification of the base feature by a new tabulated solid. László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Contextual object definition Laboratory task VE 1. 3 László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
Product structure and its application at model changes Laboratory task VE 1. 4 Study structure of the model constructed in laboratory task VE 1. 3. Understand product structure and its levels. Select contextual objects in the structure for modification. Study representation of a rectangle. László Horváth UÓ-JNFI-IAM http: //nik. uni-obuda. hu/lhorvath/
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