SAE J2546-2002 Model Specification Process Standard.pdf
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1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX: (724) 776-0790 SAE WEB ADDRESS http:/w
3、ww.sae.org Copyright 2002 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 STANDARD J2546 ISSUED FEB2002 Issued2002-02 Model Specification Process Standard TABLE OF CONTENTS 1.Scope . 2 1.1Background 2 1.2Pu
4、rpose 2 1.3Model Development 2 1.4Application 5 2.References. 6 2.1Related Publications. 6 3.Definitions. 6 4. EE Commodity Analysis and Modeling Considerations 10 4.1Analysis Requirements. 10 4.1.1Types of Analysis. 11 4.1.2Analysis Methodology and Simulation Tools 11 4.2Modeling Considerations 12
5、4.2.1Modeling of Wholly Electrical Commodities 12 4.2.2Modeling of Mechatronic Commodities . 12 4.2.3Modeling Non-Electrical Entities in the Control Loop . 12 4.2.4Modeling of Control Modules 13 4.2.5Control System Modeling . 13 5.Modeling Fidelity . 13 5.1Levels of Model Refinement. 13 5.2Levels of
6、 Feature Content 15 5.3Forms of Simulation Results. 16 5.4Diminishing Returns of Fidelity. 16 5.5Accommodating Different Fidelity Needs in a Model 16 6.Modeling Assumptions: 16 6.1Units of Measurements. 16 6.2Connection Type Definition. 16 6.2.1Standard Sign Convention 17 6.3Reference. 17 SAE J2546
7、Issued FEB2002 -2- 6.4Model Assumptions 17 6.5Environmental and Operating Conditions.17 6.6Input Parameters 17 6.7Supplementary Output Variables18 7.Model Architecture18 7.1External Signal Interface Requirements .18 7.2Model Internal Requirements18 7.3Textual Messages.19 7.3.1Informational Messages1
8、9 7.3.2Overstress Messages.19 7.3.3Warning Messages.19 7.3.4Error Messages 19 8.Validation Requirements.19 8.1Functional Test Procedures 19 8.2Characterization Test Procedures.19 8.3Data Reduction Procedure .19 8.4Validation Procedure and Data.20 8.5Validation Criteria20 9.Deliverables 20 9.1Models
9、20 9.1.1Source Code.20 9.1.1.1Header20 9.1.1.2Comments 20 9.1.1.3Programming Languages20 9.1.1.4Drawing Symbols20 9.1.2Supporting Deliverables21 9.2Documentation21 9.2.1Model Application Documentation 21 9.2.1.1Description21 9.2.1.2Netlist or Dataflow Hierarchy 21 9.2.1.3Input Parameters 21 9.2.1.4C
10、onnection Points.21 9.2.1.5Output Variables .21 9.2.1.6Usage Notes.21 9.2.2Support Documentation21 9.2.2.1Model Features.21 9.2.2.1.1Connection Points.21 9.2.2.1.2Parameters .21 9.2.2.2Template Usage21 9.2.2.3Model Limitations22 9.2.2.4Model Theory22 9.2.2.5Characterization Test Procedures and Data.
11、22 9.2.2.5.1Equipment Used .22 9.2.2.5.2Data Acquisition Procedure 22 9.2.2.6Model Validation Data.22 9.2.2.7Model Datafile.22 9.2.2.8Appendices.22 9.3Support.22 Appendix A EE Commodities.23 Appendix B Example Saber Modelfile Header Layout .30 SAE J2546 Issued FEB2002 -3- 1.ScopeThe modeling require
12、ments listed in this document provide guidelines for specifying: Analysis requirements Computer-Aided Engineering (CAE) simulator Model fidelity System assumptions Model architecture Validation requirements Deliverables for electrical/electronic components and the integral interfacing systems (mecha
13、nical, thermal, hydraulic) associated with these components. The simulation models are primarily intended to facilitate functional specification and operational evaluation between component and system manufacturers, and are not intended to otherwise constrain or restrict the use of CAE simulation to
14、ols for automotive design, analysis and validation. 1.1BackgroundThe advances in computer technology since the 1970s have enabled the development of powerful CAE tools. These tools are being increasingly applied to the highly competitive automotive industry for the development of new components and
15、systems. CAE tools allow companies to reduce the number of prototype phases and are considered key enablers in their product development process to produce designs in less time, with higher quality and lower costs. However, over the years many custom tools have been developed with specific modeling
16、and analysis objectives. Today, suppliers are asked more and more to deliver component models that satisfy different sets of objectives. This leads to the development of numerous simulator specific models of the same basic component. When component models are developed with different objectives and
17、with unspecified degrees of fidelity, it is difficult to capture component interactions that allow system trade-off investigations and thus, system design optimization. With the need to produce more cost-effective designs, the automotive industry is ready for the development of the Model Specificati
18、on Process Standard. 1.2PurposeThe Model Specification Process Standard is intended to define a common set of standards in defining model requirements for automotive electrical/electronic and mechatronic components. These requirements include functional specifications, their intended applications an
19、d the deliverables. 1.3Model DevelopmentThis standard provides a guide for writing a simulation model specification by the end user, known as the Requester, and is detailed in the Model Specification Process shown in Figure 1. The general process steps are: a.The Requester requires a component model
20、 to perform system simulations and submits the component specification based on this standard to the component supplier, known as the Producer. b.The Producer receives the model specification and, possessing detailed knowledge of their component, develops a specific component model. This model can b
21、e developed from the ground up or it can be developed from generic component models that are assembled to provide the proper performance. These generic component models can be developed by the CAE simulator supplier or by other component manufacturers. c.The Producer validates the specific model aga
22、inst the Model Specification and delivers the model to the Requester. d.The Requester receives the requested model and performs the necessary system simulations. SAE J2546 Issued FEB2002 -4- FIGURE 1SIMULATION MODEL DEVELOPMENT UNDER THE MODEL SPECIFICATION PROCESS STANDARD SAE J2546 Issued FEB2002
23、-5- This process has the benefits of having a common vocabulary and standard interpretation of what is being requested and what will be delivered. Essentially, this Standard improves the communication between the system integrators and the component manufacturers in the automotive industry and will
24、enable the development of automotive systems that represent high customer value. This document will focus on developing the model requirement guidelines (highlighted oval in Figure 1) and this will allow the development of the SAE Commodity Model Standards. 1.4ApplicationThis standard provides a gui
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