1. Tethered Aerostat Program Critical Design Review Team Name Critical Design Review College Team Members Date 1

2. Tethered Aerostat Program Critical Design Review User Notes You can reformat this to fit your design, but be sure to cover at least the information requested on the following slides This template contains all of the information you are required to convey at the CDR level. If you have questions, please don’t hesitate to contact Dan Hawk directly: naas.wsgc@gmail.com or Kevin Crosby: kcrosby@carthage.edu naas.wsgc@gmail.com 2

3. Tethered Aerostat Program Critical Design Review Purpose of CDR Confirm that: –The design is mature enough to move into the fabrication phase –Final analysis on systems that weren’t prototyped or needed further analysis is complete and accurate –Results of prototyping suggest the system will meet project requirements –Build plan is in place –Testing plan is in place and sufficient to ensure system functionality and performance in-flight –PDR risks have been walked down and to the left on the risk matrix (if possible) –The project is on track to be completed on time and within budget 3 gnurf.net

4. Tethered Aerostat Program Critical Design Review **Presenting the CDR** 50%: This presentation focuses on WHY you designed the payload the way you did Most obvious explanation is so that it meets your mission requirements, but you need to explain HOW it does this –Don’t forget about off ramps, de-scopes, and design changes How and Why –Think about how to explain each design element from the how and why aspect 50%: The other half of the presentation is the execution of how you are going to do all of this, don’t forget about this HALF! 4 gnurf.net

5. Tethered Aerostat Program Critical Design Review CDR Presentation Content 5 Section 1: Mission Overview –Mission Overview –Organizational Chart –Theory and Concepts –Concept of Operations –Expected Results Section 2: Design Description –Requirement/Design Changes Since CDR –De-Scopes/Off-Ramps –Mechanical Design Elements –Electrical Design Elements

6. Tethered Aerostat Program Critical Design Review CDR Presentation Contents 6 jessicaswanson.com Section 3: Prototyping/Analysis –Analysis Results Interpretation to requirements –Prototyping Results Interpretation to requirements –Detailed Mass Budget –Detailed Power Budget –Detailed Interfacing Plan Section 4: Build Plan –Mechanical Elements –Electrical Elements –Software Elements

7. Tethered Aerostat Program Critical Design Review CDR Presentation Contents 7 Section 5: Testing Plan –System Level Testing Requirements to be verified –Mechanical Elements Requirements to be verified –Electrical Elements Requirements to be verified –Software Elements Requirements to be verified Section 6: Risks –Risks from PDR to CDR Walk-down –Critical Risks Remaining

8. Tethered Aerostat Program Critical Design Review CDR Presentation Contents 8 Section 7: Project Management Plan –Schedule –Budget Mass Monetary –Work Breakdown Structure

9. Tethered Aerostat Program Critical Design Review Mission Overview Name of Presenter 9

10. Tethered Aerostat Program Critical Design Review Mission Overview Mission statement Break mission statement down into your overall mission requirements What do you expect to discover or prove? Who will this benefit/what will your data be used for? 10

11. Tethered Aerostat Program Critical Design Review Organizational Chart What subsystems do you have? Who works on each subsystem? You can assign subsystems to ASI’s as needed. –Leads? Don’t forget faculty advisor/sponsor(s) 11 Project Manager Shawn Carroll System Engineer Riley Pack CFO Shawn Carroll Faculty Advisor Chris Koehler Sponsor LASP Faculty Advisory Emily Logan Safety Engineer Chris Koehler Testing Lead Jessica Brown EPS David Ferguson Riley Pack STR Tyler Murphy Aaron Russert DEP Aaron Russert Shawn Carroll PM Kirstyn Johnson Elliott Richerson

12. Tethered Aerostat Program Critical Design Review Concept of Operations Based on science objectives, diagram of what the payload will be doing during flight and highlights areas of interest, i.e.: –If you’re looking at certain parts of the atmosphere mark the times at which you will reach these altitudes (e.g., t+10min: alt = 100 m) –If you are waiting for particular events in flight, mark those on the diagram with a time (approximate) 12

13. Tethered Aerostat Program Critical Design Review Expected Results 13 These need to be updated to finalized numbers; research here should be complete Go over what you expect to find –Ex. What wavelengths do you expect to see? How many particles do you expect to measure? What concentrations do you anticipate finding in the time allocated to each measurement? How many counts of radiation? Etc.

14. Tethered Aerostat Program Critical Design Review Design Description Name of Presenter 14

15. Tethered Aerostat Program Critical Design Review De-Scopes and Off-Ramps Has the scope of your project changed? –i.e. have you eliminated any mission objectives to complete the project on time? If there are portions of your project with high risk, do you have “off-ramps” in case you have schedule/budget constraints? –An off-ramp is something you can remove, or not do, with your payload to reduce complexity while still meeting some of your mission requirements This information could require multiple slides 15

16. Tethered Aerostat Program Critical Design Review Mechanical Design Elements Show final design WITH LABELS AND DIMENSIONS –Please show isometric/angle view of your payload plate with each major component identified If you have made changes since PDR, discuss WHY you made them and how it affects your mission requirements Was anything not modeled? 16

17. Tethered Aerostat Program Critical Design Review Electrical Design Elements Please show finalized block diagrams, state how many PCBs/breadboards you will use and what each one will do, sensors they will have (multiple slides) –Do you have schematics? If you show them, talk about them. Any changes to this system since PDR? (1-2 slides) –How does this affect your mission requirements? –What has been finalized that wasn’t at PDR? 17

18. Tethered Aerostat Program Critical Design Review Software Design Elements 18 Show a software flow diagram Show pseudo code if possible Discuss major functions – inputs, outputs, purpose, etc ** Software is the biggest showstopper in flight hardware development. Begin developing your software very early, and test test test!!**

19. Tethered Aerostat Program Critical Design Review Prototyping/Analysis Name of Presenter 19

20. Tethered Aerostat Program Critical Design Review Analysis Results 20 What was analyzed/tested since PDR? What are the key results? How do these results relate to the project requirements?

21. Tethered Aerostat Program Critical Design Review Prototyping Results 21 What was prototyped? –i.e. electrical system bread boarded, boom arm, payload foam mock-up… – What are the key results? How do these results relate to the project requirements?

22. Tethered Aerostat Program Critical Design Review Detailed Mass Budget 22 ExampleSat Mass Budget SubsystemTotal Mass (lbf) Sensors0.16 Platform0.73 Camera0.68 Arduino and box0.49 … … … … Total3.1 Over/Under1.9 Present your subsystem masses and total mass similar to what is given at right. Over/Under is the difference between your payload mass and the 5 lb mass limit. If you are over 5lb, it’s not necessarily a problem – we just need to know.

23. Tethered Aerostat Program Critical Design Review Power Discussion Show an approximation of how much power each system will use vs. how much is available Discuss how your power supply will be sufficient 23 ExampleSat Power Budget SubsystemVoltage (V)Current (A)Time On (min)Amp-Hours STR0000.000 DEP120.420.013 EPS280.3200.100 PM280.980.120 … … … … Total (A*hr):0.233

24. Tethered Aerostat Program Critical Design Review Build Plan Name of Presenter 24

25. Tethered Aerostat Program Critical Design Review Mechanical Elements 25 What needs to be cut/made/built? What needs to be procured? Present a plan/schedule to get it done in time for testing. Don’t forget margin! SLIDE COUNT: Your Discretion

26. Tethered Aerostat Program Critical Design Review Electrical Elements 26 What needs to be built/soldered? How many revisions of the electronics do you anticipate? (Be realistic!) What needs to be procured? Present a plan/schedule to get it done in time for testing. Don’t forget margin! SLIDE COUNT: Your Discretion

27. Tethered Aerostat Program Critical Design Review Software Elements 27 What discrete blocks of code need to be completed? Which blocks depend on other blocks? Present a plan/schedule to get it done in time for testing. Don’t forget margin! SLIDE COUNT: Your Discretion

28. Tethered Aerostat Program Critical Design Review Testing Plan Name of Presenter 28

29. Tethered Aerostat Program Critical Design Review Mechanical Testing 29 Consider subsystem level requirements to be verified (mass/volume/vibration…) Present a brief overview of the tests you need to conduct to verify these requirements What are you testing How will you know if your system passed? When will these tests be performed? SLIDE COUNT: Your Discretion

30. Tethered Aerostat Program Critical Design Review Electrical Testing 30 Consider subsystem level requirements to be verified (sample rate/deployment tests…) Present a brief overview of the tests you need to conduct to verify these requirements What are you testing How will you know if your system passed? When will these tests be performed? SLIDE COUNT: Your Discretion

31. Tethered Aerostat Program Critical Design Review Software Testing 31 Consider how software and electrical depend on each other for testing Present a brief overview of what portions of the code need to be completed to test the electrical system at its various testing points When will these tests be performed? SLIDE COUNT: Your Discretion

32. Tethered Aerostat Program Critical Design Review System Level Testing 32 Consider system level integrations that you will have to do Mechanical integrations (fit-checks), electrical – sensor integration, components to structure integration, etc Present a brief overview of the tests you need to conduct to verify these requirements Describe what you will be measuring, what you are looking for, how you will know you passed When will these tests be performed? WHERE will these tests be performed? What will you need? Who will be doing it? SLIDE COUNT: Your Discretion

33. Tethered Aerostat Program Critical Design Review Risks Name of Presenter 33

34. Tethered Aerostat Program Critical Design Review Risk Walk-Down 34 Consequence RSK.1 RSK.3 RSK.4 RSK.2 RSK.1RSK.3 RSK.4 Possibility What were your biggest risks at PDR? (remind me) What have you done to mitigate them? Hopefully you have moved them to the lower left side of the risk chart as a result (walk-down)

35. Tethered Aerostat Program Critical Design Review Risk Walk-Down 35 Consequence RSK.1 RSK.3 RSK.2 Possibility What are your NEW top 3 risks since PDR? Do you have plans to walk them down? Are there any risks you just have to accept? Why?

36. Tethered Aerostat Program Critical Design Review Project Management Plan Name of Presenter 36

37. Tethered Aerostat Program Critical Design Review Schedule 37 Your schedule should be VERY detailed at this point – break it down by months, with specific days for deadlines: When will you procure things? Major tests listed Major integrations listed The more you plan for, the fewer surprises there will be! This can be a Work Breakdown Schedule (WBS), Schedule List, or another method of presentation Don’t let the schedule sneak up on you!

38. Tethered Aerostat Program Critical Design Review Budget 38 Present a somewhat detailed budget A simple Excel spreadsheet will do It is suggested that you add in at least a 10% margin at this point Margin:0.10Budget:$1,300.00Last Update:9/30/2010 11:50 ExampleSat ItemSupplierEstimated, Specific CostNumber RequiredToal CostNotes Motor ControllerDigiKey$150.002$300.001 for testing PMLASP$0.001 LASP mentor deserves shirt MicrocontrollerDigiKey$18.003$54.003 board revs Printed Circuit BoardsAdvanced Circuits$33.003$99.003 board revs Misc. Electronics (R,L,C)DigiKey$80.003$240.003 board revs Boom Materialonlinemetals.com$40.002$80.001 test article ProbeLASP$0.001 Testing Materials???$200.001 Estimated cost to test system Total (no margin):$973.00 Total (w/ margin):$1,216.25

39. Tethered Aerostat Program Critical Design Review Project Summary Remaining issues (hopefully none) Areas of concern –What are you worried about? –Be honest, now is the best time to go over it 39

40. Tethered Aerostat Program Critical Design Review What’s your plan of action at this point? What are you going to try to get done before the next review? Conclusion 40