Lecture 2: The Design Project

Transcription

1 Lecture 2: The Design Project ME1720 Dr. Jill Schmidt 292E Toomey Hall Course webpage: ide20.com

2 I completed software assignment #1 and quiz #1 A. Yes 50% 50% B. No Yes No

3 It s all online! ide20.com Course Policy (Syllabus) Schedule Software Assignments & More!

4 This Week: Lecture Introduce design project Project management tools Objective Trees Lab Team assignments Start work on Memo #1 Software MS Office Tutorial 2: Excel 1, Assignment and quiz due Friday, Sept. 4 th by 11:59PM Drink Coffee Sleep Office Hours

5 Next Week No Lecture Labor Day Holiday A short handout on functional models will be posted on the course schedule on ide20.com this Friday (9/4/15) Read through the handout and complete the 5 point quiz on Blackboard by 11:59PM on Tuesday (9/8/15) This will count as the clicker quiz for this week Labs will be held as usual on Wed/Fri

6 The Design Project Fall 2015 Close the Door!

7 Objective (based on a true story) I ride my bike to work most days and need to close the garage door behind me when I leave. I m tired of switching my one garage opener between bike and car (and too cheap to buy a second opener) Ideal situation: I press a button, exit the garage with my bike, and the door closes behind me Your task: Build a machine that will press the button on my wallmounted door control panel with a 30 second delay, giving me time to exit safely

8 Constraints The machine must be verified to be safe by your lab instructor BEFORE used by your team. No explosions may be used The maximum allowable voltage in your team s device is 25V. If your team uses batteries, the combined maximum mass of batteries allowed is 1kg. The device must fit within the 24 by 24 rectangular test zone and be less than 60 tall before being activated. Once ready to test, your team s device must be activated by the instructor, and the physical component (button, switch, lever) used to turn the machine on must be clearly labeled ON. External control and energy is NOT allowed, once activated your team s device must operate on its own.

9 Testing Your team s testing period is 3 minutes, multiple attempts are allowed in this period

10 Scoring Final Prototype (12/2/15 and 12/4/15) Performance 1: (30%) Button pressed within 3s of specified interval (30s): 10 points. Button pressed within 2s of specified interval (30s): 20 points. Button pressed within 1s of specified interval (30s): 30 points. Performance 2: (20%) The button is pressed with sufficient force to activate. The button has been wired to set off a doorbell chime when pressed.

11 Scoring (continued) Complexity (30%) will be assessed by counting energy transformations. The most complex machines will receive the highest scores for complexity. During alpha testing, a minimum number of transformations for receiving full points will determined. Acceptable forms of energy: Translational Mechanical (e.g. a button), Rotational Mechanical (e.g. a lever), Electrical (e.g. an electrical circuit), Hydraulic (e.g. falling water), Pneumatic (e.g. blowing air), Chemical (e.g. a component that is dissolved), Note: Nuclear energy is not allowed for safety reasons. Aesthetics/style points (20%): Team name on design Team logo on design Design is painted or decorated

12 Please Note: The device must be designed and built by your team. Components may be sourced from vendors but must be team assembled. What is and is not considered to be team-built is to be determined by your lab instructor and/or me. The instructors reserve the right to revise this project description at any point in the semester to address safety and/or project definition issues.

13 SAFETY Safety is the most critical aspect of engineering systems that interact with people Shop (IDE building, G3E) will open ~6 th week of class Use of the shop outside of posted hours is prohibited, even if the door is open (another shop is attached and used M,W,F) During posted hours, a shop supervisor will be present Safety glasses will be required while working on projects Unsafe behavior will result in a team being prohibited from using the shop or testing Unsafe devices will NOT be allowed to test When testing is occurring, all persons must be outside the testing area (will be marked)

14 The ME 1720 Design Process Project Planning Project management tools Team structure and working agreement Conceptual Design Understanding the customers and their needs Establishing objectives and functions Translating functions to forms Establishing concepts, representing in sketches Concept selection Details and Embodiment Risk/safety Manufacturing Modeling/experiments Prototyping Wing It?

15 Project Management is critical to the success of team projects

16 Case Study Missouri S&T Solar Car

17 Problem Areas: Understanding of Duties Responsibilities Communication Task Schedule Budget Accounting

18 A Look at History Sol Survivor 27th of E-Cubed 30th of 38 $80k in debt 1997 Solar Miner 17th of 36 Money left over 1999 Solar Miner II 1st Within Budget 2001 Solar Miner III 2nd 2003 Solar Miner IV 1st 2005 Solar Miner V 4th When were project management techniques put in place?

19 Scope Spending Scheduling Planning Controlling Project Management Organizing Measure progress Corrective action Structure Roles/responsibilities Leading Coordinating Motivating Project progression

20 Project Management Tools Gantt Chart Calendars Team Budgets

21 I ve heard of a Gantt chart before A. Yes 50% 50% B. No Yes No

22 Gantt Chart Named for Henry Gantt - Industrial Engineer Easy to Use! All in one table: Tasks Persons Times Precedence

23 TASK RESPONSIBLE MON TUES WED THURS FRI Identify Customer Define Customer Needs Define Functionality Identify Concepts Select Concepts Harry, Ron Hermione, Ginny Fred, George Ginny, Fred Ron, Hermione Meeting All <> Deadline All <> Tasks: Sequential Parallel Specific Times

24 Team Calendar What should you include? Deadlines Recurring activities Team meetings

25 This is a sample calendar only! Does not represent actual assignments/due dates for this semester Sunday Monday Tuesday Wednesday Thursday Friday Saturday Team 3PM to work on Memo Team 3PM to work on Memo Team 3PM to work on Memo 2 Memo 1 Due Objective Tree + Functional Model Due Morph Matrix +sketches due Memo 2 Due Team 3PM Team 3PM

26 Important Points! Consult schedule at ide20.com for important deadlines/due dates to include Review calendar each meeting Be consistent with Gantt Chart

27 Budget No budget constraint for this project Guideline: less than the cost of a textbook What might you need to budget for? Prototype materials Final materials Value of time

28 Conceptual Design Project Clarification Design Objectives

29 Clarification Customer Needs Requirements Product Functionality

30 How can we formalize this?

31 Objectives Objective Trees

32 Objectives definition: Expressions of desired attributes and behaviors customers want to see in the product.

33 Objectives = BE Objectives represent desired qualities Language of the customer

34 Objective Trees definition: A method to transform customer statements into specific design objectives

35 Three Step Procedure 1. Prepare a list of design objectives 2. Order list into sets of higherlevel and lower-level objectives 3. Draw a tree of objectives, showing hierarchical relationships and interconnections

36 Prepare a list Thoroughly read written design statements and requirements. Interview your customer. Clarify vague statements Brainstorm with your design team.

37 Designers ask questions: Who will be using the product? What will be done with the product? How should this be done? Why do you want it that way?

38 Double Check Your Initial List You may have listed items other than objectives such as: Constraints Restrictions on Design Functions Operations product will DO Implementation Ways to execute function

39 Remember objectives are BE statements. The product should BE.

40 Order the list Copy design objectives to Post-it notes Place on a wall Group statements into related topics Order from high-level to low-level within each group

41 Draw the Tree Cluster sets of objectives Hierarchy = general specific

42 Safe, accessible, and affordable public transportation system for Rolla Safe Accessible Affordable Equipped with state-of-the art safety features Low risk for injury ADA Accessible Connected with current transportation system Affordable to maintain Affordable to Install

43 Overall objective Safe, accessible, and affordable public transportation system for Rolla Safe Accessible Affordable Equipped with state-of-the art safety features Low risk for injury ADA Accessible Connected with current transportation system Affordable to maintain Affordable to Install

44 Overall objective Safe, accessible, and affordable public transportation system for Rolla Safe Accessible Affordable Equipped with state-of-the art safety features Low risk for injury ADA Accessible Connected with current transportation system Affordable to maintain Affordable to Install More detailed objectives

45 Objective Tree Summary Determining design objectives is part of clarifying the design problem Objectives are BE words Objectives express product attributes and expectations of the customer Objectives tree is a graphical way to show: Design objectives Hierarchy of objectives

46 The most important objective of this project is: A. Be safe 20% 20% 20% 20% 20% B. Be precise (timing) C. Be complex D. Be the best decorated E. Get an A Be safe Be precise (timing) Be complex Be the best decorated Get an A

47 Next Week No Lecture Labor Day Holiday A short handout on functional models will be posted on the course schedule on ide20.com this Friday (9/4/15) Read through the handout and complete the 5 point quiz on Blackboard by 11:59PM on Tuesday (9/8/15) This will count as the clicker quiz for this week Labs will be held as usual on Wed/Fri