Design Team #11 1

 Team Members Jeffery Aucoin Dima Eshtaya Sean Milley Jamie Zwicker  Team Supervisor Dr. Robert Bauer 2

Introduction Existing DesignProposed Design 3 4D.jpg

Rubber Stop Pad 4

Existing Design  Rubber Pad attached to the heel of one rollerblade  To stop user must push the pad against the ground to create a braking force 5 on-inline-skates/

Areas of Improvement  Balance and Stability  Difficulty/Technique  Pad Wear and Lifetime  Stopping Distance 6 on-inline-skates/

Center of Mass 7

Testing  Average maximum speed: 30km/h  Average stopping distance from 20km/h: 13m  Video Clip or Picture of Actual Testing 8

Requirements of Proposed Design 9

Design Requirements 1. Removable 2. Support a 225lb user 3. Improved braking distance 4. Maintain mobility/stability 5. Controlled stop 6. Increased lifetime 7. Serviceable 10

Foot Support Wheel Frame and Assembly Power Supply Brake Actuator and Application Control Unit 11

Foot Support  Ability to attach over existing footwear  Modify existing snowboard binding Add third strap Adjust mobility of back support 12

Wheel Frame  Housing for all components of the skate  ⅛” Square Channel Iron  Dimensioned to incorporate range of shoe sizes 13

Wheel Assembly  All rotating pieces Axles Wheels Bearings Brake rotors 14

Electric Band Drum Disk 15

Electric/Magnetic Brakes  Good for high speed braking  Provides energy feedback  Brake force diminishes as speed decreases  Cannot lock up 16

Band Brakes  High actuator forces due to limited space  Easily serviceable  Susceptible to vibrations 17

Drum Brakes  Least actuating force  Complex setup  Not easily serviceable  Poor heat dissipation Prone to brake fade 18 brake1.htm

Disk Brakes  High actuating forces  High rate of heat dissipation Less susceptible to brake fade  Easily serviceable 19 hydraulic-disc-brake jpg

Brake Torque Calculations 20

Disk Brake Calculations 21

Hydraulic Pump Solenoid / Piston Setup Electric Motor with Power Screw and Piston Setup 22

Hydraulic Pump  Provides adequate pressure  Too Large in size / weight  High cost 23

Solenoid / Piston Setup  Provides adequate force  Forces diminishes with displacement  Large power requirement  High current draw 24

Electric Motor with Power Screw and Piston  High torque motor  High forces generated  High pressure output  Low power consumption  Low cost, weight and size banebots-planetary- gearmotor.html

Power Screw Calculations Power Screw Specs Output Force Output rpm Output Rev/s Torque N*m Torque in*lb Thread Type ¼-20 Left Hand Force LbForce N

Solar Alternator Manual Battery 27

Power Supply  Solar  Alternator  Manual Power  Battery Power CA&catalog=Online&category=RC+Toy+Batteries& product=

Hydraulic Lines Wired Wireless 29

Hydraulic Lines  Simple Control  Connects user’s hands to feet  Mobility compromised 30

Wired  Additional requirements  Connects user’s hands to feet  Mobility compromised 31 lL._SL500_AA280_.jpg

Wireless  Additional Requirements  Eliminates physical connection  Mobility maintained 32 u-high-power-motor-controller- 1.html usb-microcontroller- atmega168.html explorer-regulated.html

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Budget 1 Braking, 1 Non-braking DescriptionQtyUnit PriceTotal PriceTotals Braking Prototype1$ Planetary gear and power screw motor1$35.55 Rotor2$10.00 $ x 90mm wheels with bearings1$79.99 Hydraulic brake caliper with lever controlled piston1$ Hydraulic brake caliper1$80.00 Hydraulic fluid1$20.00 Attachment screws and bolts1$20.00 ratchet straps6$9.99 $59.94 strap buckle6$12.99 $77.94 axle rod1$6.50 square channel1$20.00 plastic foot support2$45.00 $90.00 Section Sub-Total $ Wireless Controller Transmitter1$40.00 Receiver1$40.00 Micro Controller1$ Motor Controller1$50.00 Section Sub-Total $ Safety Equipment Helmet1$29.99 Mouth guard1$10.00 Section Sub-Total $39.99 Power source battery pack and charger for actuator motor1$ AA batteries for wireless controller1$20.00 Section Sub-Total $43.99 Total Summary sub total $1, % tax $ % miscellaneous $ final total $1,

Existing Design vs. Proposed Design 35

Conclusion 36

The End 37