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P11228 Week 4
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Transcript of P11228 Week 4
P11228Week 4
Japh LearnJoseph CoreaTim MonahanBryan ReinheimerEd Gliss
Agenda• Morphological Chart• Feasibility Study• Proposed Solution
– Logic and Schematics• Preliminary Testing
– Clutch Actuation– Actuation Method– Data Collection
• System Risks• Timeline• Team Responsibilities
Morphological Chart
Actuate Clutch System
Power Source Hydraulic Pneumatic Electronic
Move Clutch Shaft Linear Actuator Rotary Actuator Cable
Sense Position Linear Potentiometer
Rotory Potentiometer Pressure Sensor
Manual Override Electronic Control (Rot. Pot.) Cable -
Carry System Signal CAN Bus Serial -
Process System Signal Existing ECU Separate
Microcontroller -
Easy to Fix/Maintain
Modular Custom Parts
Modular COTS Parts
Mixture of Custom and COTS Parts
Measure Wheel Slip Torque Sensor Wheel Speed
Sensors -
Feasibility Study
• Power Source– Hydraulic
• Advantages– Fluid is incompressible– Can withstand high line pressures– Precise volume control
• Disadvantages– Hydraulic fluid is heavier than air– Leaks pose risk to customer at competition– Reaction time at a given pressure is lower– Hydraulics are more strictly regulated in FSAE– Hydraulic pump requires another power system
Feasibility Study
• Power Source– Electronic
• Advantages– Simple storage device– Does not require any fluids– Most energy dense option
• Disadvantages– Heavy– Slow response due to back EMF– FSAE rules on a secondary electronic power source
reduce the systems efficiency and increase complexity
Feasibility Study
• Power Source– Pneumatic
• Advantages– Fluid can be vented to atmosphere– Customer familiar with pneumatic systems– Leaks to not pose a health risk or issue for customer during
competition– System lockup easily mitigated
• Disadvantages– Loss of air pressure results in loss of system power– Recharging the system cannot be done by the customer– Space claim is larger than other options
Feasibility Study
• Move Clutch Shaft– Cable will be used as mechanical override– Linear actuators are more common for pneumatic
systems• Sense Position
– Linear potentiometers cannot seal well– Rotary potentiometer can handle environment– Pressure sensors require baseline testing
• Manual Override– Both controls will be integrated to system
Feasibility Study
• Carry System Signal– CAN Bus will allow our system to interface with
many other systems quickly and effectively• Process System Signal
– Existing ECU does not have functionality we need– Microcontroller will allow design freedom
CAN System
00000 000001
Feasibility Study
• Easy to Fix/Maintain– A mixture of custom and COTS parts will be
required– When applicable, COTS parts will be used to
lower cost and make repairing easy• Measure Wheel Slip
– Customer currently uses wheel speed sensors• Utilize these to minimize complexity and cost
Electronic System Logic
Proposed Control Circuit
See Excel spreadsheet for Bill of Materials
Pneumatic System Logic
Proposed Pneumatics
See Excel spreadsheet for Bill of Materials
Proposed SolutionsSimulink
Preliminary TestingClutch Actuation
Preliminary TestingClutch Actuation
Preliminary TestingClutch Actuation
Preliminary TestingActuation Method
Preliminary TestingData Collection
System Risks• Component lead times
– Rotary potentiometer (5-7 days)– Pneumatic cylinder (3-6 weeks)
• Cost/budgeting• Packaging constraints• Familiarity with involved systems
– Engine– Control
• System failure• Customer delays• Maintenance time
Timeline
Week 5 Week 6 Week 7 Week 8
Due\
Presentations
Update EdgeHomeworkSystem Level Review
Update EdgePeer Review
Update EdgeHomework
Update EdgeHomework
Plan
Rough BudgetSimulation UnderwaySystem InterfacesFinish FeasibilityPreliminary Parts List
“Finalize” Risks
Preliminary CAD DrawingsFinalized BudgetFinalized Parts List
Prepare for Week 9
Timeline
Week 9 Week 10 Week 11
Due\Presentations
Update EdgeDetailed Design Review
Update EdgePeer Reviews
Update EdgeProject Review
Plan Testing PlanUpdate from Detailed Design ReviewPrepare for Project Review
See Excel spreadsheet for more extensive timeline
Team Responsibilities
•Car IntegrationBryan
•Budgeting•Cockpit Controls/Ergonomics•Control System
Ed•Back-up System DesignJaph
•Electronics System Design•Control SystemJoe
•Pneumatic System DesignTim