Dr. Gareth J. BennettTrinity College Dublin
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1E10 JF Induction1E10 JF InductionMechanical & Manufacturing EngineeringMechanical & Manufacturing Engineering
1E10 Engineering Design II“The Mighty Roman Mangonel”.
Dr. Gareth J. Bennett
Dr. Gareth J. BennettTrinity College Dublin
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ObjectiveObjective
What are the factors that control the distance? (The dynamics)
Dr. Gareth J. BennettTrinity College Dublin
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Design Project – Mangonel
Conceive Design Implement Operate
Dr. Gareth J. BennettTrinity College Dublin
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Design Project – Mangonel
Conceive Design Implement Operate
Dr. Gareth J. BennettTrinity College Dublin
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Design Project – Mangonel
Conceive Design Implement Operate
Dr. Gareth J. BennettTrinity College Dublin
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Design Project – Mangonel
Conceive Design Implement Operate
Work in teams•4 streams A, B, C, D•10 groups per team•3/6 students per team
Many locations for project work for Tuesday (C&D) and Thursday (A&B) mornings
Lectures on a Friday at 2pm: Everyone to attend
Dr. Gareth J. BennettTrinity College Dublin
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Lec1 Friday 22 Jan. Ham4-Joly 14:00-15:00 Dr. Gareth Bennett Project Briefing & Dynamics
Lec2 Friday 29 Jan. Ham4-Joly 14:00-15:00 Dr. Roger West Why things fail
Lec3 Friday 5 Feb. Ham4-Joly 14:00-15:00 Dr. Roger West Designing against Structural Failure
Lec4 Friday 12 Feb. Ham4-Joly 14:00-15:00 Dr. Brian Foley Introduction to Digital Electronics
Lec5 Friday 19 Feb. Ham4-Joly 14:00-15:00 Prof. David Taylor How to Choose the Right Material
Lec6 Friday 26 Feb. Ham4-Joly 14:00-15:00 Prof. John Fitzpatrick The Role of Modelling in Engineering Design
Lec7 Friday 12 Mar Ham4-Joly 14:00-15:00 Dr. Ciaran Simms Simulation in Engineering Design
Friday LecturesFriday Lectures
Dr. Gareth J. BennettTrinity College Dublin
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Design Project – Mangonel
Conceive Design Implement Operate
Work in teams4 streams A, B, C, D10 groups per team3/6 students per team
Many locations for project work for Tuesday (C&D) and Thursday (A&B) mornings
Lectures on a Friday at 2pm: Everyone to attend
Dedicated demonstrators per location
Continuous assessment based on assignments•Work Carried out in groups and individually. When assignments are to be submitted individually work is not to be copied!
Dr. Gareth J. BennettTrinity College Dublin
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Study the dynamics of a Mangonel!
• Understand the parameters that effect the dynamics of the missile
• Be able to predict the trajectory and distance of a missile thrown
• Have an understanding of energy exchange between the Mangonal and the missile
•Use this knowledge to be able to optimise the design
Modules within projectModules within project
Dr. Gareth J. BennettTrinity College Dublin
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Design Project – Mangonel
Conceive Design Implement Operate
Dr. Gareth J. BennettTrinity College Dublin
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Study the stress and strain of elements of the model
• We want to be able to fire the missile as far as possible, however, excessive forces will cause the Mangonel to break.
• From the structural analysis, can we optimise the design for strength and power?
Modules within projectModules within project
Dr. Gareth J. BennettTrinity College Dublin
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Structural Analysis
Can design
•Diameter of arm
•Diameter of spindle
Design Project – Mangonel
Conceive Design Implement Operate
Dr. Gareth J. BennettTrinity College Dublin
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• Electronic instrumentation
•Design instrumentation which will allow the angular velocity and acceleration of the arm to be measured.
•Consists of
•Sensors fitted to Mangonel
•Logic design to control sensor outputs
•Software design of micro-processor
•Assembly and operation of instrumentation to measure parameters on electronic display.
Modules within projectModules within project
Dr. Gareth J. BennettTrinity College Dublin
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Design Project – Mangonel
Conceive Design Implement Operate
Measure Arm Velocity
•Instrumentation
•Software
•Hardware
Result is a useful measurement tool!
Dr. Gareth J. BennettTrinity College Dublin
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Build and Test the Mangonel•The output from the other modules will allow us to optimally design the Mangonel• Some components pre-assembled, you have to finish the model implementing your design choices
Operate the Mangonel•Competition at end!
Modules within projectModules within project
Dr. Gareth J. BennettTrinity College Dublin
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Design Project – Mangonel
Conceive Design Implement Operate
Gareth J. Bennett, Christine Bohan, "Taking a practical approach to very ancient weaponry". Special report on Science, Engineering and Technology. The Irish Times, 2008
Dr. Gareth J. BennettTrinity College Dublin
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Group 20 20 20 20 10 10 20 20 20 20 20 20 20 20 10 10 20 20 20 20
C1-C5 L5 L5 L5 L5 L5
C6-C10 L5 L5 L5 L5 L5
D1-D5 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1
D6-D10 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1
A1-A5 L5 L5 L5 L5 L5
A6-A10 L5 L5 L5 L5 L5
B1-B5 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1
B6-B10 L1 L1 L1 L1 L1 L1 L1 L1 L1 L1
Friday22 J anuary
All
C1-C5 L6 L6 L6 L6 L6 L7 L7 L7 L7 L7
C6-C10 L7 L7 L7 L7 L7 L6 L6 L6 L6 L6
D1-D5 L2 L2 L2 L2 L2 L2 L2 L2 L2 L2
D6-D10 L2 L2 L2 L2 L2 L2 L2 L2 L2 L2
A1-A5 L6 L6 L6 L6 L6 L7 L7 L7 L7 L7
A6-A10 L7 L7 L7 L7 L7 L6 L6 L6 L6 L6
B1-B5 L2 L2 L2 L2 L2 L2 L2 L2 L2 L2
B6-B10 L2 L2 L2 L2 L2 L2 L2 L2 L2 L2
Friday29 J anuary
All
PHULab
PHULab PHCADLab
PHCADLab PHULab
PHCADLab
PHCADLab
PHCADLab
PHCADLab
ICT
ICT
ICT
PHCADLab
PHULab PHCADLab
ICT
HAM4- J oly
HAM4- J oly
10:00- 11:00 11:00- 12:00 2:00- 3:00 3:00- 4:009:00- 10:002:00- 3:00
Week 2
11:00- 12:009:00- 10:00 10:00- 11:00
Thursday21 J anuary
Week 1
Lecture 1- GB
Thursday28 J anuary
Lecture 2 - RW1
3:00- 4:00
Tuesday19 J anuary
Tuesday26 J anuary
Dr. Gareth J. BennettTrinity College Dublin
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C1-C5 L11 L11 L11 L11 L11 L12 L12 L12 L12 L12
C6-C10 L11 L11 L11 L11 L11 L12 L12 L12 L12 L12
D1-D5 L13 L13 L13 L13 L13 L14 L14 L14 L14 L14
D6-D10 L14 L14 L14 L14 L14 L13 L13 L13 L13 L13
A1-A5 L11 L11 L11 L11 L11 L12 L12 L12 L12 L12
A6-A10 L11 L11 L11 L11 L11 L12 L12 L12 L12 L12
B1-B5 L13 L13 L13 L13 L13 L14 L14 L14 L14 L14
B6-B10 L14 L14 L14 L14 L14 L13 L13 L13 L13 L13
A1-A5
A6-A10
B1-B5
B6-B10
C1-C5
C6-C10
D1-D5
D6-D10
ICT Lab 2 (Upstairs Computer Hut)
Simon Perry Building
Printing House CAD Lab
Printing House Undergrad Lab
Printing House Hall
Drawing Office (Museum Buildiing)
PHULab
PHULab
DO
Students Choice
Rugby Pitch
Rugby Pitch
Students Choice
Students Choice PHULab
Rugby Pitch
PHULab
L12
L13
L14
L8
L9
L10
L11
Week 12
Thursday8 April
Friday9 April
Tuesday6 April
L15
L15
Speed Test of Mangonel
Mangonel redesign for competition
Competition
Activity
Code
L1
L2
L3
L4
L5
Hardware 2
Assembly of Mangonel
Spring Test of Mangonel
Distance Test of Mangonel
Hardware 1
Software 2
L15 L15
Design against failure under dynamic actions
L6
L7
Dynamics of Mangonel - With Drag
Design against failure under static actions
Picaxe Simulator
Software 1
L15
L15 L15
L15
Dynamics of Mangonel - No Drag
L15
L15
L15 L15
L15 L15
L15
L15
PHH
L15
Laboratory Title
DO
Students Choice
PHH Rugby Pitch
DO Rugby Pitch
SP
PHCADLab
PHULab
PHH
Location
Locations Locations Code
ICT
Dr. Gareth J. BennettTrinity College Dublin
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General NotesGeneral NotesAssignments• Submit via WebCT 2/3 weeks after the lab-will be announced.• DO NOT email to me• Late submissions marked out of 70%
Passwords•Keep on top of them – tricky. •Your responsibility•Use TCD Password Manager:•http://isservices.tcd.ie/accounts/pwd_manager.php•Go to help desk of IS Services for help