Integration of CAE Tools for Complete System Prototyping EASY5 User Conference May, 2000 Presented by: Joel Tollefson

Transcription

1 Integration of CAE Tools for Complete System Prototyping 2000 User Conference May, 2000 Presented by: Joel Tollefson

2 Presentation Focus Provide a framework to support other presentations define concepts outline different methods for integrating CAE tools survey current tools and practices Methods of integrating CAE tools static data integration co-simulation coupled-simulation s Integration of Engineering Tools Integration of CAE Tools - Chart 2

3 Introduction What s driving integrated systems modeling and engineering? need to be streamline engineering process: companies have many different engineering tools, methods and processes goal: reduce time to market promise: complete system prototyping What is virtual system prototyping? modeling of entire systems, from systems level down to detailed subsystems goal: produce a complete virtual system prototype - a computer model use computer models to design, analyze, simulate, test entire system before cutting metal prototype: increase design iterations, validate design, reduce h/w testing costs Requirements for system prototyping ability to integrate systems modeling tools - apply broad array of computeraided engineering (CAE) tools create an integrated engineering environment Integration of CAE Tools - Chart 3

4 Overview of the Engineering Environment higher Product Definition lower Functional Design & Analysis Engineering Flight Controls Electrical System Certification Mechanical Propulsion System Req ments Functional Objectives Flight Avionics Loads & S & C Structures Flutter ECS Propulsion Hydraulics H/W Design Level of Abstraction lower Model Fidelity Application/ Verification Real Time Auto Code Simulators LRU s Schematics Drawings... and others... higher multi-discipline Integration of CAE Tools - Chart 4

5 Selecting Design and Analysis Tools Design & Analysis Engineering Electrical MATLAB, MATRIXx Flight Controls System Certification Mechanical DADS, ADAMS Landing Gear Product Definition System Req ments Functional Objectives Flight SABER Avionics Two opposing views: Propulsion, FlowMaster Hydraulics RPAS NASTRAN CATIA S & C Structures Loads & Flutter ECS H/W Design tool-centric integrated tools many different engineering design and analysis tools can be applied to different disciplines Application Real Time Auto Code Simulators LRU s Schematics Drawings... and others... multi-discipline Integration of CAE Tools - Chart 5

6 Survey of Design & Simulation Tools Partial list of simulation-based tools Engineering Disciplines MATLAB MATRIXx SABER FlowMaster ADAMS, DADS Pro/Mechanica VANTAGE STATEMATE Controls Finite State StateFlow BetterState Mechanical Electric Circuits Integrated Circuits Electric Machinery Pneumatics Powertrain Hydraulics Auto-Code Real Time Integration of CAE Tools - Chart 6

7 Chose the Integrated Tools Approach Over 6 years of experience integrating CAE tools with. Tools are integrated using our Extensions feature. Finite State STATEMATE Multi-body Dynamics CAD MATLAB ADAMS Pro/ENGINEER Controls Simulink DADS CATIA MATRIXx Pro/MECHANICA SystemBuild NASTRAN/ANSYS Structural ASIC design Vantage (& other ViewLogic tools) GSDS Beacon Auto-Code Generator in work Integration of CAE Tools - Chart 7

8 s Extension What is the Extension? a special component that provides the s/w hooks for other CAE tools to integrate with from user s point-of-view it provides a seamless integration of tools Provides an open architecture and published API for integrating other tools with. Integration of CAE Tools - Chart 8

9 Example of Extensions: Integration of and GSDS GSDS Auto-code modules may be added as components in When the user clicks on the GSDS module the diagram for that module will pop up in BDED Presentation on and GSDS integration to be given by Mike Bingle. Integration of CAE Tools - Chart 9

10 Extensions Expands s Application Domain MATLAB MATRIXx SABER FlowMaster ADAMS, DADS Pro/Mechanica VANTAGE STATEMATE Controls Finite State StateFlow BetterState Statemate Mechanical (1) (1) (2) Electric Circuits Integrated Circuits VANTAGE Electric Machinery Pneumatics Powertrain Hydraulics Auto-Code Real Time GSDS (1) linked with DADS, ADAMS, Pro/Mechanica (2) integrated with DADS, ADAMS, Pro/Mechanica embedded tool = linked/integrated with external tool = Integration of CAE Tools - Chart 10

11 Cross-Functional Integration of Tools Bridging the Gap Between & Design Behavioral system requirements flows down design capability flows up Detailed Design Design & Analysis Engineering Flight Controls Electrical System Certification Mechanical Propulsion System Req ments Functional Objectives Flight Avionics Loads & S & C Structures Flutter ECS Integrate tools across functional boundaries: <==> Design Most difficult, least understood integration process Propulsion Hydraulics Different engineering environment: Behavioral Vrs. Detailed Design Important integration - detailed behavior can affect high level behavior - Preliminary Design - Trade Studies H/W Design Integration of CAE Tools - Chart 11

12 Example of Cross-Functional Integration Draper Labs IEE Program Precision Instrument Simulation Equations of motion Behavioral Description of a Detailed Mechanical Design Implementation Detail flows up into the system simulation Draper Labs Integrated Engineering Environment Build a systems level model Integrate detailed design model as needed. Integration of CAE Tools - Chart 12

13 Bridging the Gap Between Engineering Disciplines Engineering Electrical System Certification Mechanical System Req ments Functional Objectives Flight Integrate across engineering disciplines, within same function Much easier process Propulsion Similar engineering environment Two ways to integrate: - Static Integration - Dynamic Integration Design & Analysis Flight Controls Propulsion Avionics Loads & S & C Structures Flutter ECS Hydraulics H/W Design multi-disciplines Integration of CAE Tools - Chart 13

14 Static Integration of CAE Tools Static Integration: geometric or parametric data is shared between programs simple - implementation is usually straight forward commonly used to integrate different types of application tools; example: geometric-based modeling with simulation-based tool example: CATIA and DADS integration - shares geometric data example: NASTRAN <==> integration NASTRAN /NASTRAN Integration extract NASTRAN modes convert to modal data insert data directly into component /NASTRAN integration is implemented using an Extension component. Integration of CAE Tools - Chart 14

15 Beyond Static Integration Example: Genesis/KIRTS functional integration with Genesis/KIRTS: generates functional dynamic models from CAD definitions of hydraulic and ECS systems Presentation will be given by Raju. CATIA Genesis/KIRTS Solid Model Assembly Parts Schematics Hydraulic Model Genesis/Kirts Functional Integration Integration of CAE Tools - Chart 15

16 Dynamic Integration of CAE Tools Involves dynamic integration of data and/or code. Much more complex and difficult to implement geared to simulation-based tools 2 methods co-simulation integration coupled-simulation integration Integration of CAE Tools - Chart 16

17 CAE Integration Using Co-Simulation Co-Simulation two simulation programs run simultaneously each solves its own differential equations - each controls its own Time data is shared between programs at predetermined time intervals Simulator 1 (Controls time) Simulator 2 I/O Model Equations X X Central Integrator Data Between Models Exchanged At Sample Periods I/O Model Equations X X Central Integrator Examples of co-simulation s co-simulation with SystemBuild and Simulink Integration of CAE Tools - Chart 17

18 Co-Simulation Disadvantage Not a design and analysis tool -- only a simulation tool not possible to generate a linear model of complete system can not perform controls design and analysis, steady state, etc. Excessive run times for models with coupled dynamics small data sharing time intervals may be required - constrains numerical integration and results in unacceptable simulation run-times MATRIXx/DADS co-simulation is a good example of this problem: f DYNAMIC SIMULATION PROGRAM actuator model pressure forces pos, vel, accel MULTI-BODY PROGRAM mechanism model differential equation for pressure in actuator is closely related to the mechanism velocity velocity is closely related to pressure force from actuator requires small data sharing time interval (about 1E-6) to achieve accurate results Co-simulation works best on systems that are not tightly coupled. Integration of CAE Tools - Chart 18

19 Interface to MATRIXx/MATLAB Purpose To simulate any model from within MATRIXx (SystemBuild) or MATLAB (Simulink) models. Advantage you can use to build large, complex highly nonlinear plant models - difficult to do with MATLAB/ MATRIXx use Switch states and special integrators use application libraries - hc, hv, ec, pt, en, etc. use other tool s strength - controller design and analysis Controller MATRIXx MATLAB Co-Simulation Plant Dynamics Integration of CAE Tools - Chart 19

20 CAE Integration Using Coupled-Simulation Coupled-Simulation approach equations (differential, difference, algebraic) from different CAE tools are combined (coupled) into one set of equations, inserted into one of the CAE programs solved by a central numerical integrator in the simulator that controls time required when equations in different tools are tightly coupled - such that only a central numerical integrator can produce more accurate results within a reasonable amount of time Simulator 1 (Controls Time) Model Equations From Simulator 1 X Model Equations From Simulation 2 X Central Integrator Integration of CAE Tools - Chart 20

21 Advantages/Disadvantages of Coupled-Simulation Advantages reduced simulation time true design and analysis tool allows engineer to apply all analyses: simulation, steady-state, linear analysis, control systems design integration is more seamless from users point of view Disadvantages much more difficult to integrate CAE tools using coupled-equations approach Example of coupled-simulation integration: integration with DADS, ADAMS, and ProE/Mechanica actuator model pressure forces pos, vel, accel multi body model differential equations & data DADS by CADSI mechanism model Coupled-simulation of CAE tools easily done with Extensions. Integration of CAE Tools - Chart 21

22 Summary Integration of CAE tools is necessary for complete system prototyping. Integration of CAE tools is central to - being developed as a core competency Extensions feature provides a mechanism for integrating CAE tools - makes the integration appear seamless to the user. Integration of CAE Tools - Chart 22