Application of Model Based System Engineering (MBSE) Principles to an

Automotive Driveline Sub-System Architecture

“모델기반시스템엔지니어링(MBSE) 기법의 자동차 동력전달 하부시스템 아키텍쳐 개발 응용”

발표자료와 디트로이트 대학 석사논문은 FORD 회사의 동력전달 하부시스템 아키텍처 개발과제에

MagicDraw MBSE 도구를 활용하여 기능 및 논리적 해결책 분해, 요구사항관리와 시험검증 까지의 추적성,

사이징에 제약사항모델링 통한 접근 등 MBSE 응용의 혜택을 잘 보여준 성공적인 적용사례를 기술해 주고 있다.

Discussion Agenda

● Introduction - Driveline Engineering Today
● Project Summary - Driveline System Engineering Using MBSE
● Systems Engineering Concepts
● MBSE Concepts
● Driveline Definitions and Concepts
● Driveline Sizing - Purpose, Inputs, Torque Transfer Physics
● Driveline Model Structure - Functional and Logical Decomposition
● Requirements Management - Import Process, Traceability, Test Cases
● Parametric Relationships - Constraint Modeling Applied to Sizing
● Benefits of Applied MBSE
● Conclusion

Introduction

● Current State: Today’s automotive driveline system engineering process is “document based”

○ Complex system requirements and specifications are communicated through large amounts of electronic data
○ Often leads to incomplete or conflicting requirements
○ Inefficient, redundant, error prone
○ Requires constant updates and management
○ Running changes introduce potential problems

● Objective: Investigate the real world application of a SysML model in place of the document based approach to a mechanical driveline system

Project Summary

● Investigated system engineering concepts
● Obtained and studied current driveline system methods and sizing tools
● Identified need for improving requirements traceability in driveline systems engineering
● Studied MBSE concepts
● Created detailed driveline system model to apply the concepts of MBSE using SysML
● Added parametric constraints for sizing calculations
● Delivered functional MBSE model as proof of concept

Table of Contents

1. System Engineering Concepts

The System Engineering V-Model

System Boundary Definition

System P-Diagram

2. Model Based Systems Engineering Concepts

Language, Method and Tools

Functional Architecture

System Requirements

Logical Architecture

Physical Architecture

3. Driveline Definitions and Concepts

Driveline Architecture

Driveline Components

Joint Definitions and Overview

Sub-System Definition

4. Driveline Sizing

The Purpose of Driveline Sizing

Driveline Sizing Methodology

Sizing Tool Overview

Torque Transfer Physics

Required Inputs and Data

5. Driveline Model Structure

Functional Decomposition

Logical Decomposition

Creation of Internal Relationships

6. Requirement Management

Import Requirements

Creation of Test Cases

Verification Matrix

Satisfy Matrix

7. Parametric Relationships

Sizing Inputs in System Model

Parametric Constraint Modeling

Parametrics Relationships for Driveline Sizing

Notes on Modeling Parametric Diagrams

8. Benefits of Applied MBSE

Improved Communication

Management of Requirements

Parametric Input Cascade and Control

Conclusion