BmwPwrPrkgDampg_MDD

Module Design Document

For

BmwPwrPrkgDampg

April 18, 2018

Prepared For:

Software Engineering

Nexteer Automotive,

Saginaw, MI, USA

Prepared By:

Software Group,

Nexteer Automotive,

Tychy, Poland
Change History

Table of Contents

1 Introduction 4

1.1 Purpose 4

1.2 Scope 4

2 BmwPwrPrkgDampg & High-Level Description 5

3 Design details of software module 6

3.1 Graphical representation of BmwPwrPrkgDampg 6

3.2 Data Flow Diagram 6

3.2.1 Component level DFD 6

3.2.2 Function level DFD 6

4 Constant Data Dictionary 7

4.1 Program (fixed) Constants 7

4.1.1 Embedded Constants 7

5 Software Component Implementation 8

5.1 Sub-Module Functions 8

5.1.1 Init: BmwPwrPrkgDampgInit1 8

5.1.2 Per: BmwPwrPrkgDampgPer1 8

5.2 Server Runables 8

5.3 Interrupt Functions 8

5.4 Module Internal (Local) Functions 8

5.5 GLOBAL Function/Macro Definitions 8

6 Known Limitations with Design 9

7 UNIT TEST CONSIDERATION 10

Appendix A Abbreviations and Acronyms 11

Appendix B Glossary 12

Appendix C References 13

Introduction

Purpose

MDD for CF082A_BmwPwrPrkgDampg_Impl.

Scope

The following definitions are used throughout this document:

• Shall: indicates a mandatory requirement without exception in compliance.

• Should: indicates a mandatory requirement; exceptions allowed only with documented justification.

• May: indicates an optional action.

BmwPwrPrkgDampg & High-Level Description

The subject function can be activated or deactivated through a coding bit. This function is responsible for determining the amount of additional motor torque damping during parking, getting to the point the power pack cannot provide the full assist anymore. The function will avoid any hard change of assist comparable to the EOT damping. The function is primarily derived from the handwheel velocity, the pinion angle and it is scaled by the vehicle velocity.

Design details of software module

Graphical representation of BmwPwrPrkgDampg

Data Flow Diagram

Refer FDD

Component level DFD

Refer FDD

Function level DFD

Refer FDD

Constant Data Dictionary

Program (fixed) Constants

Embedded Constants

Local Constants

Software Component Implementation

Sub-Module Functions

The sub-module functions are grouped based on similar functionality that needs to be executed in a given “State” of the system (refer States and Modes). For a given module, the MDD will identify the type and number of sub-modules required. The sub-module types are described below.

Init: BmwPwrPrkgDampgInit1

Design Rationale

Refer FDD

Module Outputs

Refer FDD

Per: BmwPwrPrkgDampgPer1

Design Rationale

Refer FDD

Store Module Inputs to Local copies

Refer FDD

(Processing of function)………

Refer FDD

Store Local copy of outputs into Module Outputs

Refer FDD

Server Runables

None

Interrupt Functions

None

Module Internal (Local) Functions

None

GLOBAL Function/Macro Definitions

None

Known Limitations with Design

None

UNIT TEST CONSIDERATION

None

Abbreviations and Acronyms

Glossary

Note: Terms and definitions from the source “Nexteer Automotive” take precedence over all other definitions of the same term. Terms and definitions from the source “Nexteer Automotive” are formulated from multiple sources, including the following:

• ISO 9000

• ISO/IEC 12207

• ISO/IEC 15504

• Automotive SPICE® Process Reference Model (PRM)

• Automotive SPICE® Process Assessment Model (PAM)

• ISO/IEC 15288

• ISO 26262

• IEEE Standards

• SWEBOK

• PMBOK

• Existing Nexteer Automotive documentation

References