MVRT 115 Training 2: Engineering Design

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MVRT 115Training 2 EngineeringDesign

• PowerPoint by Ashwin Mathur and Karthik Kumaravel

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AgendaTopic Robot Design Concepts

• Design Constraints
• Design Process

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BASIC CONSTRAINTS
YOU, AS AN ENGINEER, HAVE MANY CONSTRAINTS TO
WORRY ABOUT
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Design Constraints

• Feasibility
• Maintainability
• Cost Effective
• Replaceable
• Machine-able
• Functionality
• Size and weight
• Programmable Needs to be programmable for the
  electrical team
• Practical
• Affordable Time, Man power, Cost

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Big picture in Design Constraints

• Fits size and weight constraints present by FIRST
  and by the robot design as a whole
• Follows the Rules and spirit of FIRST
• Able to be integrated with the design of the rest
  of the robot
• KISS Keep it Simple Stupid
• Simplicity

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BASIC CONSTRAINTS
WE RUN ON AN EXHAUSTABLE SUPPLY OF FUNDS, WHICH
TRANSLATES TO
COT
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BASIC CONSTRAINTS
THE ROBOT HAS A LIMIT ON ITS DIMENSIONS, WHICH
TRANSLATES TO
SIZE
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BASIC CONSTRAINTS
OUR MACHINISTS HAVE LIVES, WHICH TRANSLATES TO
MACHINABILITY
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BASIC CONSTRAINTS
YOU WILL BE MAINTAINING AND REPAIRING WHATEVER IT
IS, WHICH TRANSLATES TO
MAINTAINABILITY
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BASIC CONSTRAINTS
THE DARN THINGS GOT TO WORK, WHICH TRANSLATES TO
FUNCTIONALITY
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COST

• SOME MORE THINGS TO CONSIDER
• MATERIALS IN STOCK ARE ESSENTIALLY FREE.
• SPECIALTY PARTS COST YOU YOUR LUNCH.
• OVERNIGHT SHIPPING COSTS YOU YOUR DINNER.
• YOU MAY NEED TO MAKE A REPLACEMENT.

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SIZE WEIGHT

• SOME MORE THINGS TO CONSIDER
• THE ROBOT HAS SET MAXIMUM DIMENSIONS FOR WIDTH,
  LENGTH, AND HEIGHT.
• IT ALSO HAS SET MAXIMUM DIMENSIONS FOR TOTAL
  WEIGHT.

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MACHINABILITY

• SOME MORE THINGS TO CONSIDER
• TIMING AND FEASIBILITY ARE KEY
• TIMING INVOLVES NOT OVERWORKING OUR MACHINISTS
• FEASIBILITY INVOLVES DESIGNING ACCORDING TO THE
  CAPABILITIES OF OUR TEAM (MORE ABOUT THIS LATER)
• TREAT THE MACHINISTS WITH RESPECT! THEY ARE
  VOLUNTEERS AFTER ALL AND NOT ALL LIKE COFFEE.

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MAINTAINABILITY

• SOME MORE THINGS TO CONSIDER
• TIGHTENING LOTS AND LOTS OF BOLTS IS NOT MUCH
  FUN.
• ROBOTS LIKE TO MATCH COORDINATES PREPARE FOR
  SUDDEN STOPS AND TRANSFER OF MASSIVE AMOUNTS OF
  KINETIC ENERGY (COLLISIONS).
• IF SOMEONES BATTERY EXPLODES AND RIPS A HOLE IN
  YOUR COMPONENT, YOU MUST BE ABLE TO HAVE IT
  REPAIRED OR REPLACED WITHIN 10-15 MINUTES.

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FUNCTIONALITY

• SOME MORE THINGS TO CONSIDER
• OBVIOUSLY, THE COMPONENT MUST WORK.
• MAXIMIZING THE RATIO OF FUNCTIONALITY TO THE
  OTHER FACTORS IS OUR MAIN CONCERN.
• SIMPLE IS ALWAYS BETTER

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Design Process
This Process can also be applied to programming

• Brainstorming
• Narrowing the Design
• Prototyping
• Design Reviews
• Redesigning
• Finalizing the Design
• Inventorizing
• Machining
• Building/Assembling

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Step 1 Brainstorming

• Understand Challenge
• Come up with Ideas
• Evaluate Idea using Constraints and Common
  Knowledge/Sense

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Step 2 Narrowing the Design

• Start Figuring out details of Design
• Start drawing Design on Paper
• Start Inventor
• Come up with Plan for Prototype
• Figure out how things are start connecting
  together
• Start choosing material and other specifics of
  the design
• Re-evaluate design, now also consider the
  remainder of the robot

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Step 3 Prototyping

• Make a Prototype of Design
• Use cardboard and other easy to find material
• Proof of Concept
• Starts addressing issues for the real part to be
  assembled.
• Support for Concept

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Step 4 Design Review

• Get advice from experts in the field
• Receive constructive criticism
• Help solve design flaws
• Receive new ideas

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Step 5 Redesign

• Use feedback from Design Review
• Enhance Design
• Fix Flaws
• Come up with a better big picture of the design
• Fix prototype?
• New prototype?

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Step 6 Finalizing the Design

• Finalize Design
• Figure out how everything is going to connect
• Choose Material available material will be
  discussed in Design Trainings Bosch/Aluminum
  1x1
• Connect with the rest of the robot
• Address all the constraints as much as
  possiblecost effect, as light as possible while
  still being able to perform function

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Step 7 Inventor

• Put the design on Inventor
• Helps with the design of the entire robot
• Helps address problems in specific part of the
  component of the robot
• Helps with Machining
• Another Visual of Robot

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WHAT HAPPENS AFTER THE DESIGN PROCESS
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Machining
WHAT HAPPENS AFTER THE DESIGN

• Designs are sent to woodshop to be made
• Remember setting up for the process is hardest
• Dont make the machinist re-make a part later its
  easier in the beginning
• Accuracy is the most important thing to remember
• Think about what the part is using and how if
  this one part is messed up how it will affect
  everything else

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Building/Assembly
WHAT HAPPENS AFTER THE DESIGN

• Everything is put together
• During making sure everything is secure
• See where parts are weak that you didnt expect
• Maintenance is important here
• Screws and Bolts do come loose as the robot moves

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Reminders

• Team Meetings Every 1st Tuesday of the month
• at Lunch
• CAL games Mitty High School October 25th
• Registration is due on Tuesday, Oct. 7th to any
  officer or Mr. Shinta. You can also leave it in
  Mr. Shintas box in the office
• Training Days
• Mondays Engineering
• Wednesday Electrical
• Thursday Open Build/Media
• Fridays Mechanical

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Questions?