Aerospace Design SESA 3002

04/19/23 CEDCJames Scanlan; School of Engineering Sciences

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Aerospace DesignSESA 3002


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Academic team• Simon Newman; Design analysis• Kenji Takeda; Flight simulation• JS; module leader

Research Fellow Consultants;• Wenbin Song. RR Gas turbine optimisation• Alex Forrester. Airbus wing design• Hakki Eres. BAE missile design, RR LCC• Andras Sobester UAV design


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Resources

• SN web site http://www.aero.ses.soton.ac.uk/courses/AA301/restricted/index.htm

• JS web site http://www.soton.ac.uk/~jps7/Aircraft%20Design%20Resources/

http://www.aero.ses.soton.ac.uk/courses/AA301/restricted/index.htm

http://www.aero.ses.soton.ac.uk/courses/AA301/restricted/index.htm

http://www.soton.ac.uk/~jps7/Aircraft%20Design%20Resources/

http://www.soton.ac.uk/~jps7/Aircraft%20Design%20Resources/


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Resource highlights;

• MIT PhD thesis on Civil aircraft cost and performance.pdf

• Fuselage design.doc • Aircraft configuation.pdf • Integrated Systems Engineering

Approach to Aircraft Design V2.doc• Wing and fuse weight estimation.pdf • High-Lift Systems on Commercial

Subsonic Airliners (Rudolph)• Teamworking guide.pdf


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Purpose

• Realistic experience in developing a large aerospace design

• Develop skills/ understanding of teamworking and use of integrated computer tools


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Industry Requirements

• Flight International 2006..

• Module developed with Airbus and RR input


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Case Study

•Produced by Airbus FPO For Southampton

•Realistic commercial aircraft design problem

•Supported by extensive guidance notes


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Case Study Deliverables

• Flight test using MS FS

• Final presentation

• Final report


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Expected Effort• 20 credit module

• 200 hours of effort.

• 15 week timetable

• = ~13 hours per week

• = ~10 hours of your own time on this module per week!


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Programme

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Week commencing 09 O

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Introduction and objectivesBackground lecturesIndividual case studyGroup case studyInterim Group Design reviewsCAA guest lectureAirbus future projects guest lectureRolls Royce Guest lectureTest pilot guest lectureAirbus Airline economics guest lecture ExamsContinuation of group case studySimulator testing by teamsAssessed flight trials by "Test pilot"Group presentationsFeedback and review


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Assessment

• Individual assessment 15%• Flight testing 20%• Final Group Design Review 25%• Written Group Design Review 40%

• Use of peer review• Appraisal of individual contribution


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Roles/TasksExample Technical tasks

1 Kinematic simulation (high lift device/ undercarriage?)2 Total Drag Estimation3 Lift estimation (+ high lift device design)4 Structural design (in-depth study of key structure; winglet?)5 Cabin fuselage layout and dimensions6 Overall aircraft weight estimate7 Systems, selection, location and mass (powerplant, fuel, control, avionics etc)8 Optimisation (identification of design variables and experimentation/

sensitivity analysis)9 Cost estimation (acquisition and DOC)10 Performance/payload-range/certification calculations11 Flight simulation12 Whole aircraft geometry parameterisation creation/ data management13 Control/ handling/ stability calculations14 Reliability analysis


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Roles/TasksExample Management tasks

1 Chairing of meetings (rotating responsibility?)2 Generating and updating Gantt chart of activities/ responsibilities3 Documenting/recording meetings and actions4 Data handling/ setting up sussed and shared data5 Setting up and managing web-site?6 Compiling and organising presentation7 Compiling and organising final written report8 Change management

http://www.queendom.com/tests/career/team_roles_access.html

Penn State; http://tlt.its.psu.edu/suggestions/teams/student/index.htmlTeamworking guide (js website; teamworking)

http://www.queendom.com/tests/career/team_roles_access.html


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Software tools

ExcelSolidWorksGeometry

FloWorks

Motion

FEA

DProCosting

ReportingHTMLWord

Powerpoint

FS EditFS

G MaxCES

Relex


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Need for formal planning!

• Task is too big to carry in your head

• Need to understand scope

• Interactions

• Interfaces

• Clear boundaries/responsibilities

• Time and resource allocation

• Manage complexity


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Individual assignment deliverables (Deadline Friday

3rd November).• “AeroVironment”-type precedence network• List and break-down deliverables (WBS?)• Work backward from these until you hit;

– source data– assumptions– requirements– constraints

• Determine dependencies• Group tasks logically• Hand-in to be READABLE user-friendly printout.


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AeroVironment; Good example of Project Planning*

• Complex, Novel projects

• Good, clear planning procedures

* See http://appel.nasa.gov/ask/issues/11/practices/index.html

http://appel.nasa.gov/ask/issues/11/practices/index.html


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AeroVironment planning overview example


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Precedence network*

* (Free PM tool can be dowloaded from OpenWorkbench; http://www.openworkbench.org/)

Unfortunately current PM tools have very crude network modelling tools

Better initially to use advanced diagramming tool such as yEd


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Workflow/ Dependency Network;

Verb, Noun

Activity/Process

OutputInput

Normally Physical or information “object”

See also.. http://www.soton.ac.uk/~jps7/Aircraft%20Design%20Resources/project%20management/MIT%20lecture%20notes.pdf

http://www.soton.ac.uk/~jps7/Aircraft%20Design%20Resources/project%20management/MIT%20lecture%20notes.pdf


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Top level diagramExample Source Data•Payload/range objectives•Certification constraints•Current benchmark aircraft•Materials data•Fuel price projections•Operating assumptions•Environmental constraints

Example Outputs (Deliverables)

•Configuration/ geometry•Handling/ OEI performance results•Acquisition cost prediction•DOC projection•Comparative assessments•Sensitivities/ uncertainties/ reliability prediction•Utilisation/TATs

“Design system”

Drag Calculations

Weight Calculations

Stability calculations

Strength/ stiffness

calculations

Cost calculations

Lift Calculation

…..


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Work Breakdown Structure (WBS) Examples

Hierarchical view of work.

Can be useful for analysing deliverables, for example


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Team-Task Matrix

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igh

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ingl

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raft

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Team member 1 Lead AssistTeam member 2 Assist LeadTeam member 3Team member 4 AssistTeam member 5 Lead Assist………………….

Responsibility allocation

Lead/assist?

Team size ~ 10

Pseudo- random selection


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Demo of useful workflow modelling tool (yEd)

(Installed on ISS network but can be downloaded from..

http://www.yworks.com/en/index.html

http://www.yworks.com/en/index.html

Aerospace Design SESA 3002

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