25'107 Intro' to Engineering Session 7: Engineering Design III

1
25.107 Intro. to EngineeringSession 7
Engineering Design III

• David O. Kazmer, P.E., Ph.D.

2
Module FiveEngineering Design

• Dates/Topics
• 9/19 Engineering Design
• 9/21 Engineering Design
• 9/26 Engineering Design
• 10/17 Bridge Testing
• 12/7 Tsongas History Center Exhibits
• 12/12 Project Demonstrations
• Important Notes
• Bridge teams formed
• Unassigned students form teams _at_ lecture, 9/26

3
Project 1 Testing

• Movie at http//kazmer.uml.edu/Teaching/25107/Bri
  dge_Testing.wmv

4
Quiz

• To be done individually
• Place your name on a piece of paper
• What is the first step in the engineering design
  process?
• Indicate any issues/questions/topics youd
  addressed

5
Agenda

• Some Scooter Design Solutions
• In-Class Exercise
• Lecture
• Define Problem
• Gather Information
• Generate Solutions
• Analyze and Select Solution
• Test Implement Solution

6
TriGoTricycle Scooter Cpncept
7
SkaterSkateboard Scooter Concept
8
In Class Exercise

• Which is better why?
• TriGo
• Skater
• Is either novel?

9
TricycleSolution
10
SkateboardSolution
Novel elements - Independent regenerative
motors at wheels? - Force feedback for steering
stopping?
11
Some Other ScooterDesign Solutions
12
Lecture Outline

• Define Problem
• Gather Information
• Generate Solutions
• Analyze and Select Solution
• Test Implement Solution

13
Analysis Result and Detailed Design

• Analysis indicates
• 1 L of Lithium-ion batteries
• Detailed design
• Use eight 6V Panasonic BR-E3 batteries
• This provides 48V for DC motors
• Consistent with trend towards 48V in automobiles
• 100 list price total