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
http://www.skatescool.com/inline-skating/learn-how-to-t-stop-
on-inline-skates/
Slide 6
Areas of Improvement Balance and Stability Difficulty/Technique
Pad Wear and Lifetime Stopping Distance 6
http://www.skatescool.com/inline-skating/learn-how-to-t-stop-
on-inline-skates/
Slide 7
Center of Mass 7
Slide 8
Testing Average maximum speed: 30km/h Average stopping distance
from 20km/h: 13m Video Clip or Picture of Actual Testing 8
Slide 9
Requirements of Proposed Design 9
Slide 10
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
Slide 11
Foot Support Wheel Frame and Assembly Power Supply Brake
Actuator and Application Control Unit 11
Slide 12
Foot Support Ability to attach over existing footwear Modify
existing snowboard binding Add third strap Adjust mobility of back
support 12 http://5150snowboarding.com/product/ff1500
Slide 13
Wheel Frame Housing for all components of the skate Square
Channel Iron Dimensioned to incorporate range of shoe sizes 13
Electric/Magnetic Brakes Good for high speed braking Provides
energy feedback Brake force diminishes as speed decreases Cannot
lock up 16
http://www.flightglobal.com/blogs/runway-girl/Gear%20shot%201.JPG
Slide 17
Band Brakes High actuator forces due to limited space Easily
serviceable Susceptible to vibrations 17
Slide 18
Drum Brakes Least actuating force Complex setup Not easily
serviceable Poor heat dissipation Prone to brake fade 18
http://auto.howstuffworks.com/auto-parts/brakes/brake-types/disc-
brake1.htm
Slide 19
Disk Brakes High actuating forces High rate of heat dissipation
Less susceptible to brake fade Easily serviceable 19
http://www.jejamescycles.co.uk/product-images-large/avid-juicy-3-
hydraulic-disc-brake-40268.jpg
Slide 20
Brake Torque Calculations 20
Slide 21
Disk Brake Calculations 21
Slide 22
Hydraulic Pump Solenoid / Piston Setup Electric Motor with
Power Screw and Piston Setup 22
Slide 23
Hydraulic Pump Provides adequate pressure Too Large in size /
weight High cost 23
http://www.mesltd.co.uk/images/ZSIM21118476.jpg
Slide 24
Solenoid / Piston Setup Provides adequate force Forces
diminishes with displacement Large power requirement High current
draw 24
http://www.fwmurphy.co.uk/images/RP23xx_solenoid_medres.jpg
Slide 25
Electric Motor with Power Screw and Piston High torque motor
High forces generated High pressure output Low power consumption
Low cost, weight and size 25 http://www.robotshop.ca/rbban07
-banebots-planetary- gearmotor.html
Slide 26
Power Screw Calculations Power Screw Specs Output Force Output
rpm Output Rev/s Torque N*m Torque in*lb Thread Type
4447.41.45412.869 -20 Left Hand Force LbForce N 412.91836.6 26
Slide 27
Solar Alternator Manual Battery 27
Slide 28
Power Supply Solar Alternator Manual Power Battery Power 28
http://www.thesource.ca/estore/product.aspx?language=en -
CA&catalog=Online&category=RC+Toy+Batteries&
product=2300322
Slide 29
Hydraulic Lines Wired Wireless 29
Slide 30
Hydraulic Lines Simple Control Connects users hands to feet
Mobility compromised 30
http://media.rei.com/media/dd/84f36172-d484-4224-a6cc-00a2fa3e0ec6.jpg