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