system-level design tools utilizing opm and modelica · an example product lifecycle on a v 3 ls1:...

IDETC2016-60101

System-Level Design Tools Utilizing OPM and Modelica

Joshua Sutherland, Kazuya Oizumi, Kazuhiro Aoyama1

Takao Eguchi2 Naoki Takahashi3

1Department of System Innovation, The University of Tokyo, Japan.2Dassault Systèmes K.K., Tokyo, Japan.

3Shinko Research Co. Ltd, Tokyo, Japan.

ASME 36th Computers and Information in Engineering Conference (CIE)Charlotte, North Carolina

21-24 August 2016

Presentation Overview

1. Problems to address

2. Proposed solution

3. Proposed solution – Detailed description

4. Discussion

2

An example product lifecycle on a V

3


3

LS1: Clarify

Review past knowledge

LS2: Concept dev

Defining required functionality

LS3: System-Level Design

Comparing and selecting System-Level Design

LS4: Detail Design

Define 3D specifications of components.


3

LS1: Clarify


LS2: Concept dev




LS4: Detail Design


LS5: Production

Create the system


3

LS1: Clarify


LS2: Concept dev




LS4: Detail Design


LS5: Production

Create the system

LS7: Deployment

Operate and maintain

LS6: Test and Refinement

Incrementally test and refine.


3

LS1: Clarify


LS2: Concept dev




LS4: Detail Design


LS5: Production

Create the system

LS7: Deployment




Early stage the focus of Systems Engineering.


3

LS1: Clarify


LS2: Concept dev




LS4: Detail Design


LS5: Production

Create the system

LS7: Deployment





Need to quickly understand the problem…


3

LS1: Clarify


LS2: Concept dev




LS4: Detail Design


LS5: Production

Create the system

LS7: Deployment






Synthesize a solution…


3

LS1: Clarify


LS2: Concept dev




LS4: Detail Design


LS5: Production

Create the system

LS7: Deployment







And justify it…


3

LS1: Clarify


LS2: Concept dev




LS4: Detail Design


LS5: Production

Create the system

LS7: Deployment




Focus of this research are these early stages.




And justify it…

Some specific problems from a student project

4

Lifecycle Stage: LS1: Clarify LS2: Concept dev LS3: System-Level Design

Activities: Review past knowledge Defining required functionsComparing and selecting System-Level Design

Identified problems from a student project:

Slow time to acquire initial knowledge

Unclear what the design target was

Little exploration of alternatives and their predicted outcomes

Proposed solutions:Provide knowledge in models

Complete trade-off analysis of multiple designs using models to simulate performance

For more details see: Sutherland, J. et al. (2015). Systems Engineering and the V-Model: Lessons from an Autonomous Solar Powered Hydrofoil. At 12th International Marine Design Conference (IMDC).

Specific problems for this paper

5

Specific problems for this paper• Provide clarity of what the design target is and

that the designs meet that target

5



• Provide a consistent way to assess designs

5




• Manage numerical model creation

5

Problems / Solutions at Early Life Cycle Stages

6

Lifecycle Stage: LS1: Clarify LS2: Concept dev LS3: System-Level Design

Activities: Review past knowledge Defining required functionsComparing and selecting System-Level Design

Identified problems from a student project:




Proposed solutions:Provide knowledge in models

Complete trade-off analysis of multiple designs using models to simulate performance

Goal:To propose tools and methodologies to help in a Model Based way:• Synthesize, assess and select System-Level Designs





4. Discussion

7

Key:

High Level Flow Diagram

8

Stage 1: Identify Functionality and Assessment Scenarios to

Assess Functionality

Stage 2: Create Architectures

Stage 3: Create Alternative Designs

Stage 4:Combine, Simulate and Assess

System Primary Purpose

Common Functionality and Assessment Scenarios

Skeleton Modelica Models

Modelica Models: AlternativeDesigns and Assessment Scenarios

Subsystem Component Models (OPM & partial Modelica)

Subsystem Component Models (Modelica)

Designs and their performance over range of scenarios

Process

External Input /Output

Internal Input / Output

Key:


8













Process



What does the system need to do? How will we

assess it?

What architectures could achieve this?

What specific designs exist on the

architectures?

Which design is the best?

Problems at Early Life Cycle Stages

9

LS2: Concept development


LS1: Clarify

Identified problems from a student project


9



LS1: Clarify



Questions to Answer at Early Life Cycle Stages

10



LS1: Clarify

Design process questions

Focus on functions Focus on structure


10



LS1: Clarify

1. Project value?2. Measures of performance?3. What resources are

available?




10



LS1: Clarify

1. Systems functionality?2. What subsystems do they

need?3. How can they all be assessed

and compared?


available?




10



LS1: Clarify

1. Systems functionality?2. What subsystems do they

need?3. How can they all be assessed

and compared?


available?

1. Valid alternative designs?2. What is the designs predicted

performance how do they compare?3. Are there any better designs?



Proposed High Level Activities

11



LS1: Clarify


11



LS1: Clarify

Assessment scenario

developmentFunctional

concept exploration

Project clarificationFocu

s on

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n


11



LS1: Clarify


Assessment scenario

development

Develop architectures which meet functions

Create alternative designs based on the architectures

Functional concept

exploration

Project clarification

Create a numerical model of each

alternative design

Focu

s on

Deco

mp

ositio

n


11



LS1: Clarify


Numerical simulation

Assessment scenario

development


Consolidate and assess the results


Functional concept

exploration



alternative design

Compose the designs model into

the assessment scenario

Focu

s on

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n

Focu

s on

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n


11



LS1: Clarify



Assessment scenario

development




Functional concept

exploration



alternative design



Focu

s on

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mp

ositio

n

Focu

s on

Co

mp

ositio

n



11



LS1: Clarify



Assessment scenario

development




Functional concept

exploration



alternative design



Stage 1:Identify Functionality

and Assessment Scenarios to Assess

Functionality

Focu

s on

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n

Focu

s on

Co

mp

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n



11



LS1: Clarify



Assessment scenario

development




Functional concept

exploration



alternative design





Functionality

Stage 2:Create Architectures

Focu

s on

Deco

mp

ositio

n

Focu

s on

Co

mp

ositio

n



11



LS1: Clarify



Assessment scenario

development




Functional concept

exploration



alternative design





Functionality


Stage 3:Create

Alternative Designs

Focu

s on

Deco

mp

ositio

n

Focu

s on

Co

mp

ositio

n



11



LS1: Clarify



Assessment scenario

development




Functional concept

exploration



alternative design





Functionality


Stage 3:Create

Alternative Designs

Stage 4:Combine,

Simulate and Assess

Focu

s on

Deco

mp

ositio

n

Focu

s on

Co

mp

ositio

n



11



LS1: Clarify



Assessment scenario

development




Functional concept

exploration



alternative design





Functionality


Stage 3:Create

Alternative Designs

Stage 4:Combine,

Simulate and Assess

Focu

s on

Deco

mp

ositio

n

Focu

s on

Co

mp

ositio

n


Designs and their performance over range

of scenarios


12



LS1: Clarify



Assessment scenario

development




Functional concept

exploration



alternative design



Focu

s on

Deco

mp

ositio

n



Functionality


Stage 3:Create

Alternative Designs

Stage 4:Combine,

Simulate and Assess

Conceptual Modelling

Object Process Methodology (OPM)

Focu

s on

Co

mp

ositio

n



of scenarios


12



LS1: Clarify



Assessment scenario

development




Functional concept

exploration



alternative design



Focu

s on

Deco

mp

ositio

n



Functionality


Stage 3:Create

Alternative Designs

Stage 4:Combine,

Simulate and Assess


Numerical Modelling & SimulationObject Process

Methodology (OPM) Modelica

Focu

s on

Co

mp

ositio

n



of scenarios


12



LS1: Clarify



Assessment scenario

development




Functional concept

exploration



alternative design



Focu

s on

Deco

mp

ositio

n



Functionality


Stage 3:Create

Alternative Designs

Stage 4:Combine,

Simulate and Assess


Numerical Modelling & SimulationObject Process

Methodology (OPM) Modelica

Consolidateresults

MODA

Focu

s on

Co

mp

ositio

n



of scenarios

SolarSolarSolar

Summary

Level 3[Subsystem]

Level 2[System of Interest]

Level 0[Functional Architecture Primary Value]

Level 1[Assessment Scenarios]

Level 4[SubsystemComponents]

System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)

Modelica Models and Simulation

Results

Racing in Solar-Boat Race Event

Driving forward

Converting electrical to thrust

Converting electrical

to rotation

Floating

Solar-Boat

Electrical to Thrust

Subsystem

Electrical to Rotation

Component

Mechanical rotation

Converting rotation to

thrust


Component

Solar-Boat

x velocity

Solar


Subsystem


Component Electrical to Thrust

Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component

Scenario 1Scenario 2Scenario 3Scenario 4

Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object

Focu

s on

Deco

mp

ositio

n

Stage 1:Identify

Functionality and Assessment Scenarios to


SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object

Stage 1:Identify




Focu

s on

Deco

mp

ositio

n

Stage 2:

Create Architectures

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Stage 1:Identify



Stage 2:



Focu

s on

Deco

mp

ositio

n

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object

Focu

s on

Co

mp

ositio

n

Stage 1:Identify



Stage 2:



Focu

s on

Deco

mp

ositio

n

Stage 3:Create

Alternative Designs

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object

Stage 1:Identify



Stage 2:


Stage 3:Create

Alternative Designs


Focu

s on

Deco

mp

ositio

n

Focu

s on

Co

mp

ositio

n

Stage 4:Combine,

Simulate and Assess

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Stage 1:Identify



Stage 2:


Stage 3:Create

Alternative Designs

Stage 4:Combine,

Simulate and Assess


Focu

s on

Deco

mp

ositio

n

Focu

s on

Co

mp

ositio

n

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object


Object Process Methodology (OPM)

Object Process Methodology (OPM)• ISO standardized conceptual modeling language

• Single diagram type accompanied with text models behavior and structure

• Complexity managed by hierarchical decomposition

20

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object

Numerical Modelling & Simulation

Modelica

Modelica

• Multi domain numericalsimulation modeling system

• Supports acausalcomponent interactions

• Compose using existing parts libraries or makeyour own

• Supports hierarchy

22

Simulate

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object

Consolidateresults

MODA

Multi Objective Decision Analysis (MODA)• For simplicity used weighted sum from Cilli & Parnell, 2014

24 Alternatives →

Assessment scenarios

Multi Objective Decision Analysis (MODA)• For simplicity used weighted sum from Cilli & Parnell, 2014

24

3m/s

Performance

Valu

e

1.5m/s0

1

Stretch goal

Minimum acceptable

performance

𝑣𝑖(𝑥𝑖)

𝑣𝑖 𝑥𝑖 e.g. LinearDefine value function for each Assessment Scenario.

For each alternative design:Alternative’s value = 𝑣 𝑥 = σ𝑖=1

𝑛 𝑤𝑖𝑣𝑖(𝑥𝑖)

• 𝑖 is Assessment Scenario• 𝑥𝑖 is Measure of Interest for Assessment

Scenario• 𝑤𝑖 is weight for the Assessment Scenario• σ𝑖=1

𝑛 𝑤𝑖 = 1

Alternatives →

Assessment scenarios

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object

Key Point 1:Assessment Scenarios

Common To all Designs

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

ObjectKey Point 2:Distinct Model Types

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

ObjectKey Point 3:

Hierarchy same across all model types





4. Discussion

28

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Stage 1:Identify



Stage 2:


Stage 3:Create

Alternative Designs

Stage 4:Combine,

Simulate and Assess


Focu

s on

Deco

mp

ositio

n

Focu

s on

Co

mp

ositio

n

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object

Key:


30













Process



Stage 1: Identify Functionality and Assessment Scenarios to Assess Functionality

31



Solar-Boat

Solar insolation [Wm-2]xxx


31



Solar-Boat

Focu

s on

De

com

po

sition



31


FloatingDriving forward

TurningHandling

disturbance


Level 1[Assessment

Scenarios]

Solar-Boat

Focu

s on

De

com

po

sition

Ending race

x velocity [ms-1]xxx

z position [m]xxx



31



TurningHandling

disturbance


Level 1[Assessment

Scenarios]

Solar-Boat

Focu

s on

De

com

po

sition

Ending race

Assume want to create a simple design which cannot

perform these functions.Therefore do not

decompose.


z position [m]xxx


SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object

Focu

s on

Deco

mp

ositio

n

Stage 1:Identify



Key:


33













Process



Stage 2: Create Architecturesa. Decompose the Assessment Scenario Processes

34




Level 1

[Assessment Scenarios]

Solar-Boat


34




Level 1


Solar-Boat

Focu

s on

Deco

mp

ositio

n





34



Buoyancy Generation Subsystem

Displacing less dense

volume

Converting solar to

electrical



Level 1


Solar-Boat

Focu

s on

Deco

mp

ositio

n

Solar to Electrical

Subsystem


Subsystem

Level 3[Subsystem]





34





volume

Converting solar to

electrical



Level 1


Solar-Boat

Focu

s on

Deco

mp

ositio

n

Solar to Electrical

Subsystem


Subsystem


volume

Buoyancy Generation Component

Converting solar to

electrical

Solar to Electrical

Component


to rotation


Component

Mechanical rotation


thrust


Component

Level 3[Subsystem]





34





volume

Converting solar to

electrical



Level 1


Solar-Boat

Focu

s on

Deco

mp

ositio

n

Solar to Electrical

Subsystem


Subsystem

Alternatives


volume


Converting solar to

electrical

Solar to Electrical

Component


to rotation


Component

Mechanical rotation


thrust


Component

Level 3[Subsystem]




Stage 2: Create Architecturesb. Create a Formal Structure (in OPM)

35





volume

Converting solar to

electrical



Level 1


Solar-Boat

Focu

s on

Deco

mp

ositio

n

Solar to Electrical

Subsystem


Subsystem


volume


Converting solar to

electrical

Solar to Electrical

Component


to rotation


Component

Mechanical rotation


thrust


Component

Level 3[Subsystem]





36

Driving forward



volume

Converting solar to

electrical



Solar-Boat

Solar to Electrical

SubsystemElectrical to

Thrust Subsystem


volume


Converting solar to

electrical

Solar to Electrical

Component


to rotation


Component

Mechanical rotation


thrust


Component


Solar insolation [Wm-2]

xxx


xxx

Electrical Power

Electrical Power


37

Level 4 – System Architecture

Rotationinterface

Electrical interface

Level 4 Formal StructureLibrary (OPM)

Assume there is a library of Level 4 Formal Structures in OPM keyed on the equivalent System Architecture.

Enables us to find the right interface.


Level 3[Subsystem]





38

Driving forward



volume

Converting solar to

electrical



Solar-Boat

Solar to Electrical


Thrust Subsystem


volume


Converting solar to

electrical

Solar to Electrical

Component


to rotation


Component

Mechanical rotation


thrust


Component



xxx


xxx

Electrical Power

Electrical Power

Level 3[Subsystem]





38

Driving forward



volume

Converting solar to

electrical



Solar-Boat

Solar to Electrical


Thrust Subsystem


volume


Converting solar to

electrical

Solar to Electrical

Component


to rotation


Component

Mechanical rotation


thrust


Component



xxx


xxx

Electrical Power

Electrical Power Electrical to

Rotation Component

Rotational flange

Positive terminal

Negative terminal

Attachment point

Level 3[Subsystem]





39

Driving forward



volume

Converting solar to

electrical



Solar-Boat

Solar to Electrical


Thrust Subsystem


volume


Converting solar to

electrical

Solar to Electrical

Component


to rotation


Component

Mechanical rotation


thrust


Component



xxx


xxx

Electrical Power

Electrical Power Electrical to

Rotation Component

Rotational flange

Positive terminal

Negative terminal

Attachment point

Level 3[Subsystem]





40


Solar-Boat

Solar to Electrical

Component



xxx


Component

Rotational flange

Positive terminal

Negative terminal

Attachment point


ComponentRotational flange

Attachment point

Thrust [N]xxx

Negative terminal

Positive terminal

Attachment point

Solar insolation

TempBuoyancy GenerationComponent

Attachment point

Buoyancy [N]xxx


SubsystemPositive terminal

Negative terminal

Attachment point

Buoyancy GenerationSubsystem

Attachment point

Solar to Electrical

Subsystem

Negative terminal

Positive terminal

Attachment point

Solar insolation

Temp

Temperature [K]xxx

Attachment point

Solar insolation

Temp

Level 3[Subsystem]




Stage 2: Create Architecturesc. Create a Formal Structure (in Modelica)

41


Solar-Boat

Solar to Electrical

Component



xxx


Component

Rotational flange

Positive terminal

Negative terminal

Attachment point



Attachment point

Thrust [N]xxx

Negative terminal

Positive terminal

Attachment point

Solar insolation


Attachment point

Buoyancy [N]xxx



Negative terminal

Attachment point


Attachment point

Solar to Electrical

Subsystem

Negative terminal

Positive terminal

Attachment point

Solar insolation

Temp

Temperature [K]xxx

Attachment point

Solar insolation

Temp


42

Level 4 Formal StructureLibrary (OPM)

Rotationinterface

Electrical interface

Level 4 Formal StructureLibrary (Modelica partial)

Assume there is a library of Level 4 Formal Structures in Modelica.

Enables us to build a model of partial models. Creating a “skeleton”

Parts are rigidly

connected interface

Level 3[Subsystem]





43


Solar-Boat

Solar to Electrical

Component



xxx


Component

Rotational flange

Positive terminal

Negative terminal

Attachment point



Attachment point

Thrust [N]xxx

Negative terminal

Positive terminal

Attachment point

Solar insolation


Attachment point

Buoyancy [N]xxx



Negative terminal

Attachment point


Attachment point

Solar to Electrical

Subsystem

Negative terminal

Positive terminal

Attachment point

Solar insolation

Temp

Temperature [K]xxx

Attachment point

Solar insolation

Temp

Level 3[Subsystem]






ElectricalToThrustSolarToElectricalBuoyancy

Generation

Solar-Boat

Solar-Boat in an

assessment scenario

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object


Focu

s on

Deco

mp

ositio

n

Stage 2:


Key:


46













Process



Level 3[Subsystem]






ElectricalToThrustSolarToElectricalBuoyancy

Generation

Solar-Boat

Solar-Boat in an

assessment scenario Fo

cus o

n C

om

po

sition


48

Level 4 Modelica Subsystem Components Library

Level 3 SubsystemFormal Structure Modelica

Assume there is a library of Level 4 Subsystem

Components in Modelica.

Level 2 SubsystemDesign

Level 3[Subsystem]






Solar-Boat Design A

Solar-Boat in an

assessment scenario

SolarToElectricalBuoyancy

Generation

ElectricalToThrust

Focu

s on

Co

mp

ositio

n

Level 3[Subsystem]





Solar-Boat

SolarToElectricalBuoyancyGeneration

ElectricalToThrust

Level 3[Subsystem]





Solar-Boat

1) Alternatives architectures


ElectricalToThrust

Level 3[Subsystem]





Solar-Boat

1) Alternatives architectures


ElectricalToThrust

2) Alternative Subsystem

component models

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate


Focu

s on

Deco

mp

ositio

n

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object

Focu

s on

Co

mp

ositio

n


Focu

s on

Deco

mp

ositio

n

Stage 3:Create

Alternative Designs

Key:


52













Process



Stage 4: Combine, Simulate and Assess

For more details see: Sutherland, J. et al. (2016). System-Level Design Trade Studies by Multi Objective Decision Analysis (MODA) utilizing Modelica. At 1st Japanese Modelica Conference

Model to run:Scenario01_Alternative01.mo

Model to run:Scenario01_Alternative01.mo

Raw results:

Stage 4: Combine, Simulate and Assess

For more details see: Sutherland, J. et al. (2016). System-Level Design Trade Studies by Multi Objective Decision Analysis (MODA) utilizing Modelica. At 1st Japanese Modelica Conference

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object


Focu

s on

Deco

mp

ositio

n

Focu

s on

Co

mp

ositio

n

Stage 4:Combine,

Simulate and Assess

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Stage 1:Identify



Stage 2:


Stage 3:Create

Alternative Designs

Stage 4:Combine,

Simulate and Assess


Focu

s on

Deco

mp

ositio

n

Focu

s on

Co

mp

ositio

n

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

Object





4. Discussion

56

Specific problems (and solutions) for this paper

57


• Provide clarity of what the design target is and that the designs meet that target

57


• Provide clarity of what the design target is and that the designs meet that target• Decompose the required processes using OPM

• Use OPM process to define the design

57





57


• Provide clarity of what the design target is and that the designs meet that target• Decompose the required processes using OPM• Use OPM process to define the design

• Provide a consistent way to assess designs• Identify Assessment Scenarios from the required

processes• All designs assessed with the same Assessment

Scenarios

57


• Provide clarity of what the design target is and that the designs meet that target• Decompose the required processes using OPM• Use OPM process to define the design

• Provide a consistent way to assess designs• Identify Assessment Scenarios from the required

processes• All designs assessed with the same Assessment

Scenarios

• Manage numerical model creation

57




• Provide a consistent way to assess designs• Identify Assessment Scenarios from the required processes

• All designs assessed with the same Assessment Scenarios

• Manage numerical model creation• Defined hierarchy from conceptual model

• Conceptual model used to drive numerical model creation

57




• Provide a consistent way to assess designs• Identify Assessment Scenarios from the required processes

• All designs assessed with the same Assessment Scenarios

• Manage numerical model creation• Defined hierarchy from conceptual model

• Conceptual model used to drive numerical model creation

• Use OPM and Modelica to synthesize new designs and assess them

57

Discussion –Shortcomings & Further work

58

Discussion –Shortcomings & Further work• Methodology logic:

• Assumes one object enables one process• Timing and control logic of behavior (assumes processes

occur at all times)

58



occur at all times)

• Tool implementation:• Build the OPM & Modelica library

58



occur at all times)

• Tool implementation:• Build the OPM & Modelica library

• As such:• Needs demonstration on larger more complex/complicated

projects

58

SolarSolarSolar

Summary

Level 3[Subsystem]





System Architecture

(OPM)

Formal Structure

(OPM)

Formal Structure

(Modelica)


Results


Driving forward



to rotation

Floating

Solar-Boat


Subsystem


Component

Mechanical rotation


thrust


Component

Solar-Boat

x velocity

Solar


Subsystem



Component


Component


Component

Solar-BoatSolar


Subsystem



Component


Component


Component


Sub process

Subsystem

Sub system

Sub system

Component 1

Component 2


Component 1

Component 2


Solar-Boat

Solar


Subsystem


Component


Component

Sub system

Combine and

simulate

Stage 1:Identify



Stage 2:


Stage 3:Create

Alternative Designs

Stage 4:Combine,

Simulate and Assess


Focu

s on

Deco

mp

ositio

n

Focu

s on

Co

mp

ositio

n

Key:ExhibitsProcess

Enables

ConsumesEffects

AcausalCausal

ObjectQuestions?

EXTRA Slides

60

SolarBoat challenge

• Lake Biwa (Japan) competition rules:• Max 2m2 of solar panels

• Max 20Wh of lead based batteries for power train

• Complete the 20km course autonomously

• Possibility to repair boat on route

61

system-level design tools utilizing opm and modelica · an example product lifecycle on a v 3 ls1:...

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