2013

CDR

Team NameCritical Design Review

University/InstitutionTeam Members

Date

1

2013

CDR

CDR Delieverables

• In addition to this presentation, each school must include the following by December 10th

• Mechanical drawings in pdf format• Electrical schematics in pdf format• Signed copies of the Power and Telemetry ICDs in

pdf format• Completed Power Budget in xls format• Completed Pin Assignments in xls format• Completed Timer Event matrix in xls format• Be sure to place all these files, including ppt

presentation in your DropBox Pony Express folder by COB on December 10, 2012

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CDR

User Notes

• You may 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 me directly:

rocksatx@gmail.com

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CDR

Purpose of CDR

• Confirm that:– 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– Manufacturing plan is in place– Testing plan is in place and sufficient to ensure

system functionality and performance in-flight– Project meets requirements of RockSat-X user’s

guide– The project is on track to be completed on time and

within budget

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CDR

CDR Presentation Outline

5

• Section 1: Mission Overview• Section 2: Design Description• Section 3: Subsystem Design• Section 4: Prototyping/Analysis• Section 5: Manufacturing Plan• Section 6: Testing Plan• Section 7: User Guide Compliance• Section 8: Project Management Plan

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1.0 Mission OverviewName of Presenter

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Mission Overview

• Mission statement• What do you expect to discover or

prove?• Who will this benefit and/or what will

your data be used for?

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CDR

Theory and Concepts

• Give a brief overview of the underlying science concepts and theory

• What other research has been performed in the past?– Results?

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Mission Requirements:

• Project requirements derived from mission statement– Break down into mission objectives, system

level objectives– Please show traceability and linkages

– See example on following slide

9

crestock.com

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Mission Requirements:

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crestock.com

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Success Criteria:

– Define Minimum Success: What is the least amount of data you can collect that will still constitute a success?

– Comprehensive Success: Under ideal conditions, what would constitute comprehensive mission success?

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Expected Results

12

• This is vital in showing you understand the science concepts

• Go over what you expect to find– Ex. What wavelengths do you expect to

see? How many particles do you expect to measure? How well do you expect the spin stabilizer to work (settling time?)? How many counts of radiation? etc

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CDR

Concept of Operations

• Based on science objectives, describe what the payload will be doing during flight and highlights areas of interest

• Include all significant events during your flight• RS-X 2012 Mission timeline included on following

slide for guidance• You may used the example on following slide

updated with your mission events• Complete your Timer Events Matrix in xls format

and submit• Include screen shot of this matrix in your

presentation

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CDR

Concept of Operations

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Event Time On Dwell Event Description

GSE 1 T-180 sec 540 sec Minutes before launch. Start on the computer for the experiments.

GSE 2 T-180 sec 540 sec Minutes before launch. Start on the computer for the experiments.

TE-NR 1 T+000 sec 360 sec Launch

TE-NR 2 T+000 sec 360 sec Bring more power to RGA's.

TE-NR 3 T+000 sec 360 sec Bring more power to RGA's.

TE-R T+000 sec 360 sec Bring more power to RGA's.

• Example of Timer Events Matrix for presentation

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CDR

Example ConOps

t ≈ ???

Altitude: ?? km

Event A Occurs

t ≈ 876 sec

Splash Down

t ≈ ???

Altitude: ?? km

Event B Occurs

-G switch triggered

-All systems on

-Begin data collection

t = 0 min

t ≈ ???

Altitude: ?? km

Event C OccursApogee

t ≈ 199.7 sec

Altitude: ≈153 km

End of Malemute Burn

t ≈ 28.7 sec

Altitude: 17.2 km

t ≈ ???

Altitude: ?? km

Event D Occurs

Altitude

t ≈ 454.9 sec

Chute Deploys

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Concept of Operations

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2.0 Design DescriptionName of Presenter

17

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Actions from PDR

18

• Please update me on your actions assigned during PDR

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Changes Since PDR

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• What major changes have you made since PDR?– Why were these changes made?

• Do these change any of your mission objectives/requirements?

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CDR

Design Overview: Functional Block Diagrams

• Functional block diagram– Show all major and minor subsystems and

how they are interconnected– Show voltage levels and data lines– Show all power and data storage– Show mechanical and electrical inhibits– Show Wallops interface (power/telemetry)

• Example on following slide • I will spend a lot of time on this diagram with

each team and it will be referred to all the way up until launch so make it good

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Example Functional Block Diagram

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Mechanical Design Elements

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• Give me a brief overview of your final mechanical design

• Mechanical drawings should be included• Solid models (labeled) with many views

should be included• Any stress/strain analysis?• Material choices?

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3D image of our payload

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Electrical Design Elements

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• Give me a brief overview of your final electrical design

• Overall electrical schematics should be presented

• Sensor specification and how they meet your requirements

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System Electrical Diagram

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Software Design Elements

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• Give me a brief overview of your final software design

• Software flow diagram should be included• Could include State diagrams• Could include function overviews

(input/output)

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CDR

De-Scopes and Off-Ramps

27

• If there are portions of your project with lots of risk, do you have “off-ramps” in case you run into schedule/budget constraints?

• Describe these “De-Scopes” and “off-ramps” that may be used in the future

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CDR

3.0 Subsystem DesignName of Presenter

28

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CDR

Subsystem Design

29

• Start with your organization chart with each of your subsystems labeled

• Detail each subsystem’s final design• Each subsystem should be separated on to

its own slide• Each subsystem should cover:

– Drawing– Power and data– Mechanical and Electrical Interfaces– Weight– Critical technology used and current issues

grandpmr.com

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CDR

Organizational Chart

• What subsystems do you have?• Who works on each subsystem?

– Leads?• Don’t forget faculty advisor/sponsor(s)

30

Project ManagerShawn Carroll

System EngineerRiley Pack

CFOShawn Carroll

Faculty AdvisorChris Koehler

SponsorLASP

Faculty AdvisoryEmily Logan

Safety EngineerChris Koehler

Testing Lead Jessica Brown

EPSDavid Ferguson

Riley Pack

STRTyler Murphy

Aaron Russert

DEPAaron RussertShawn Carroll

PMKirstyn JohnsonElliott Richerson

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CDR

4.0 Prototyping/AnalysisName of Presenter

31

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CDR

Analysis Results

32

• What was analyzed?– i.e. Finite Elements Analysis, Aerodynamic

Loading, Boom Extension, Link Budgets…

• What are the key results?• How do these results relate to the

project requirements?

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CDR

Prototyping Results

33

• 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?

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CDR

Detailed Mass Budget

34

ExampleSat Mass BudgetSubsystem Total Mass (lbf)

STR 2DEP 8EPS 12PM 9… … … … Total 31Over/Under (1.00)

• Present your subsystem masses and total mass similar to what is given at right.

• Mass of plate is 3.425 pounds

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CDR

Detailed Power Budget

35

• USE Power Budget xls file• Include a screenshot in your presentation and the actual excel file with

your CDR package• I am most interested in total amp-hours since each payload space is

allowed 1 Ah. • Voltages and currents should also be included.

ExampleSat Power BudgetSubsystem Voltage (V) Current (A) Time On (min) Amp-Hours

STR 0 0 0 0.000DEP 12 0.4 2 0.013EPS 28 0.3 20 0.100PM 28 0.9 8 0.120… … … …

Total (A*hr): 0.233Over/Under 0.77

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CDR

Wallops Interfacing: Power

36

Power Connector--Customer SidePin Function1 2 3 4 5 6 7 8 9

10 11 12 13 14 15

• USE Pin Assignment xls file• Include a screenshot in your

presentation and the actual excel file with your CDR package

• Fill-in the function side for your payload

• Check for consistency with User’s Guide

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CDR

Wallops Interfacing: Telemetry

37

• USE Pin Assignment ICD xls file

• Fill-in the function side for your payload

• Include a screenshot in your presentation and the actual excel file with your CDR package

• Check for consistency with User’s Guide

Telemetry Connector--Customer SidePin Function Pin Function

1 20 2 21 3 22 4 23 5 24 6 25 7 26 8 27 9 28

10 29 11 30 12 31 13 32 14 33 15 34 16 35 17 36 18 37 19

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5.0 Manufacturing PlanName of Presenter

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Mechanical Elements

39

• What will be manufactured?• What will be purchased?• Present a plan/schedule to get it done in

time for testing.•Include schedule margin.•Use of diagrams is encouraged

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CDR

Electrical Elements

40

• What needs to be manufactured/soldered?

• How many revisions of the electronics do you anticipate?

• What needs to be procured?• Present a plan/schedule to get it done in

time for testing.•Include schedule margin•Use of schematics is encouraged

2013

CDR

Software Elements

41

• 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.•Include schedule margin

2013

CDR

6.0 Testing PlanName of Presenter

42

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CDR

System Level Testing

43

• Consider system level requirements that need to be verified

• Present a brief overview of the tests you need to conduct to verify these requirements

• When will these tests be performed?

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CDR

Mechanical Testing

44

• 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

• When will these tests be performed?• Call-out any deployment tests and how

they will be preformed• Discuss any mechanical inhibits you may

need for Wallops testing

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CDR

Electrical Testing

45

• 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

• When will these tests be performed?• Callout any high voltage components• Callout any internally powered components

and how they will be tested• Discuss any electrical inhibits you may need for Wallops

testing

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CDR

Software Testing

46

• 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?• Discuss any software inhibits you

may need for Wallops testing

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7.0 User Guide ComplianceName of Presenter

47

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CDR

User Guide Compliance

48

• Use the following example to show your compliance with the RS-X 2013 User’s Guide

• Teams that are sharing, please fill out your school’s compliance only

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CDR

User Guide Compliance

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Requirement Status/Reason (if needed)Center of gravity in 1" plane of

plate?1.2" currently

Max Height < 12"

Within Keep-Out

Using < 10 A/D Lines

Using/Understand Parallel Line Not Being Utilized

Using/Understand Asynchronous Line

9600 Baud

Using X GSE Line(s) 1 (per requirement)

Using X Redundant Power Lines 1 (per requirement)

Using X Non-Redundant Power Lines

2 (one extra)

Using < 1 Ah 1.1 (working on reducing)

Using <= 28 V 200 V (Will conformal coat)

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Sharing Logistics

50

• Who are you sharing with?– Summary of your partner’s mission (1 line)

• Plan for collaboration– How do you communicate?– How will you share designs (solidworks, any actual

fit checks before next June)?• Structural interface – will you be joining with

standoffs or something else (again, be wary of clearance)?

• Discuss number of meetings you have had with sharing school

• POC for sharing school and their contact info

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8.0 Project Management PlanName of Presenter

51

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Schedule

52

• Your schedule should be VERY detailed at this point• When will you procure things?• Major tests listed• Major integrations listed• Next semesters interim reviews included• The more the plan for, the fewer surprises there will be!

• Format:• Gant charts• Excel spreadsheet• Simple list• Whatever works for you!

Don’t let the schedule sneak up on you!

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CDR

Budget

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- Present a very top-level budget (not nut and bolt level)- Include launch fee and deposit amounts AND include status of each- Include estimates for travel in June and August- Include spare parts and margin in you hardware budget

Margin: 0.25 Budget: $1,300.00 Last Update: 9/30/2010 11:50ExampleSat

Item Supplier Estimated, Specific Cost Number Required Toal Cost NotesMotor Controller DigiKey $150.00 2 $300.00 1 for testingPM LASP $0.00 1 $0.00 LASP mentor deserves shirtMicrocontroller DigiKey $18.00 3 $54.00 3 board revsPrinted Circuit Boards Advanced Circuits $33.00 3 $99.00 3 board revsMisc. Electronics (R,L,C) DigiKey $80.00 3 $240.00 3 board revsBoom Material onlinemetals.com $40.00 2 $80.00 1 test articleProbe LASP $0.00 1 $0.00 Testing Materials ??? $200.00 1 $200.00 Estimated cost to test system

Total (no margin): $973.00Total (w/ margin): $1,216.25

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CDR

Team Availability Matrix

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• Please submit your availability matrix for Spring 2013 semester• Please state the time-zone on your matrix• All times are available for Chris between 7 AM – 5 PM MST

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Contact Matrix

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• You can copy and paste your contact spreadsheet here• Please re-verify participants US Person Status

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CDR

• Please list questions and concerns you would like to discuss

Conclusion

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