team john deere weekly status report week 5 josh ebeling jamari haynes james june mike reno ben...
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Team John DeereWeekly Status Report
Week 5
Josh EbelingJamari Haynes
James JuneMike RenoBen SpiveyGary TwedtWade Burch
Review of Previous Action Items
Group meeting scheduled on Friday to meet as a whole and to teleconference with other schools. Responsibility: Gary Twedt and Ben Spivey
• Met ID group members and obtained contact info
• Learned how projects were divided by school
• John Deere contacts willing to provide supplies
Revised conceptual designs from last week
Responsibility: Gary, Ben, Jamari, and James
Problem Statement: Controls
Product Idea: Gas and brake hand controls that can be effectively operated by the user.
Functional Goals: Activating and releasing the gas and brakes with a reasonable amount of effort.
Challenges: Decreasing the amount of force needed by the user to operate the controls by hand instead of foot; making the controls dependable.
Conceptual Design Review(1) Combined Cable/Pulley Control System
Pull Handle
Cable
Pulley
Brake Pedal
Pull Handle
Cable
Pulley
Brake Pedal
Pull Handle
Cable
Pulley
Brake Pedal
Conceptual Design Review(1) Combined Cable/Pulley Control System
Pros:
• One lever controls both gas and brakes
• Mechanical design meets class goals
• Ability to alter mechanical advantage with pulleys Minuses:
• Mechanical parts may require maintenance Interesting:
• Combined gas and brake in one lever
Conceptual Design Review(2) Brake/Gas Lapbar
Top View
Conceptual Design Review (2) Brake/Gas Lapbar
Pros:
• Simplicity
• Mechanical design meets class goals Minuses:
• Inability to alter mechanical advantage
• Operates using a less natural motion to brake and accelerate
Interesting:
• Few parts needed
Conceptual Design Review(3) Bicycle style brake/gas control
Conceptual Design Review (3) Bicycle style brake/gas control
Pros:
• Ability to alter mechanical advantage
• Mechanical design meets class goals
• Natural hand motion for braking/acceleration Minuses:
• Mechanical parts requiring maintenance
• Requires two hand levers
• May take time to go from gas to brake quickly Interesting:
• User has good control with hand grip motion
Conceptual Design Review (4) Steering Wheel Controls
Motor
Conceptual Design Review (4) Steering Wheel Controls
Pros:
• Control positioning allows user to maintain control of wheel while braking/acceleration
• Little modification of dash needed Cons:
• Requires knowledge of electrical controls most students don’t have
• May not have enough mechanical parts to meet class requirements
Interesting:
• Professional controls appearance
Conceptual Design Review (5) Pivot bar control
Conceptual Design Review (5) Pivot bar control
Pros:
• Natural user motion similar to airplane throttle
• High mechanical advantage with taller handle post
Cons:
• Little flexibility to have different MA for gas and brake
• Requires gas and brake pedals to be relatively aligned
Interesting:
• Throttle-like control
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