1. Critical Design Review Team Name
University/Institution
Team Members
Date

2. User notes: This template shall be followed as closely as possible.
Please follow this template as closely as possible. The grading metrics for both myself and Wallops will be based on this template.

3. Mission Overview What is your objective?
What do you expect to prove, discover, or learn from your experiment?
Brief overview of underlying science/theory
What other related research/experimentation has been done in the past?
Results?
Please note that Wallops is not as familiar with your payloads, so please ensure this info is well presented. You can glaze over it during our teleconference to save time.

4. Concept of Operations
Provide a high level overview of how your payload operates.
Diagrams are an excellent way to convey the mechanics without cluttering a slide with lots of words.
Show events such as: launch, G-switch activation, first accelerometer activated, at apogee first accelerometer deactivated and secondary becomes active, etc, etc, etc.

5. Expected Results
Explain why your experiment is relevant and what you expect to find or discover.

6. Project and System Level Requirements
What functional requirements must your payload conform to?
Scientific requirements
Mass, Volume, CG, No-Volt, etc.
Usually presented in matrix form.
Matrix can use a color to indicate current compliance with the requirement.
Green: Compliant, Yellow: Partially Compliant, Red: Not Compliant
SEE EXAMPLE ON NEXT SLIDE
Your specific requirements will vary, but they should include the requirements in the RockSat Payload Canister User’s Guide

7. Example Top Level Requirements Matrix
Method
Status
The spacecraft must not exceed a weight of 30 kg.
Design, Test
The spacecraft must operate on 30W or less.
The spacecraft’s center of gravity (CG) shall be within 0.25” of the geometric central axis of the ICU.
Design, Analysis
The allowable static envelope of the spacecraft is a cylindrical right prism with a diameter of 18.7” (47.5 cm) and a height of 18.7” (47.5 cm).
Design
The spacecraft’s CG shall not lie more than 12” above the satellite interface plane (SIP) .
The spacecraft shall have a fundamental frequency above 100 Hz given a fixed-base condition at the SIP.
The spacecraft must be capable of meeting all mission objectives.

8. System Functional Block Diagrams
A Functional block diagram of the entire system should be presented here.
It is helpful to box individual subsystems to give reviewers a reference for future presented analysis.
SEE EXAMPLES ON NEXT FEW SLIDES

9. Example of Good Functional Block Diagram
Imaging
Cam A
Cam B
Legend
USB
ADCS
TR1
TR2
TR3
MAG
Sun Sensors x6
Rate Gyro x3
Data Bus
Power Lines
Thermal
+5V Line
+/-12V Line
MLI Blkts
Therm x30
Data Line
Comm
Tx Ant / Radio / TNC
Ext TNC
Serial / I2C
C&DH
Flight Computer
Interface Board
Wireless
Power
Li-Poly Battery
+15V Unreg. Line
+28V Line
Prim SA
Body SA
PCB
Mechanisms
EMC Hinges x4
HOP
Tip-Mass Upper LB
Tip-Mass
TM Cam
TM Comm
Battery
Tether Release Mech
TM Lower LB
MicroProc IB
Rx Ant / Radio / TNC
Tip-Mass Ant / Modem

10. Example Of Excellent Functional Block Diagram
Notice Electrical Compliance with Wallops
Power
2x9V Supply Batteries
G-Switch
RBF (Wallops)
5V Regulator
X / Y Accelerometer Z
Accelerometer
Temperature Sensor
AVR Board
AirCore Board
Flash Memory
6 channel ADC
Control Circuit (NPN)
AVR
Microcontroller
ADC
Solenoid Valve
AirCore Tubing
Opening
Junction
Hand turn ball Valve
Data
Airflow
Interface
Outside of Rocket
Pressure Sensor 3
Pressure Sensor 2
Pressure Sensor 1
2x9 V Supply
Temperature Sensor 1
Temperature Sensor 2
Temperature Sensor 3

11. System Structural Drawings
Solid models
Integrated solid models
Interfaces:
To the can per the user guide requirements
To your shared customer
2D drawings can be reserved for the backup slides (only show the most relevant)
SEE EXAMPLES ON NEXT FEW SLIDES
Solid model showing how the systems all fit together indicates a mature design that is truly at the Critical Design level.

12. Structural Drawing Examples
Cup
Cone
Aerofin
Side Panel
IRS
To HOP
Release

13. Structural Drawing Examples

14. Shared Can Logistics Plan
Update Chris and I on RSPC sharing logistics since PDR
Pertains to Institutions/Universities sharing a can
Descriptions of interfacing to each other
Descriptions of interfacing to the top and bottom bulkheads

15. SEE EXAMPLES ON NEXT FEW SLIDES
System Schematics
Schematics are a key component of the CDR.
You MUST submit full system schematics as part of your CDR package. Show the most relevant ones here.
Wallops will be evaluating your schematics to determine your flight readiness.
SEE EXAMPLES ON NEXT FEW SLIDES

16. Schematic Example
Wallops Compliance

17. Subsystems Overview
What subsystems do you have: power, C&DH, thermal, etc.
What top level requirements do you have for each subsystem.
Make requirements as quantifiable as possible.
Power subsystem shall supply 2W to…
Power subsystem shall remain at or above 72 F at all times during the flight.
Which requirements are design drivers?
Where is data stored?
Be sure to include sensor specifications
Any states that your payload may have:
Active, Active/Safe, Idle…

18. Parts List MAJOR Components lists SEE EXAMPLE ON NEXT SLIDE
Not at the nut and bolt level… just major hardware that will be purchased or built in house
Lead times are an important consideration (This can make or break a project)
Distributors
Manufacturers
Keep it top level and leave low level items for backup slides
SEE EXAMPLE ON NEXT SLIDE

19. Example Parts List Parts Company Model Low range accelerometers
x and y-axis Analog Devices ADXL 203
z-axis ADXL 103
High range accelerometers
x and y-axis Analog Devices ADXL 278
z-axis ADXL 78
Microcontroller Atmel ATmega 32
ADC Analog Devices AD73360
Pressure Sensor Omega PX 209
Solenoid valve Parker
Temperature sensor National LM50CIM3
Semiconductor
Power Regulator Texas Instruments M2937IMP
Flash memory Atmel AT26DF161A
Transistors NMOS

20. Wallops Requirements
Some customers have special needs that will levy requirements on Wallops.
- Here is where you will identify any requirements that you might impose on Wallops.
- These requirements will be incorporated into the Requirements Definition Meeting (RDM)
- Not all teams will have Wallops requirements

21. RockSat Payload Canister User Guide Compliance
Type of Restriction
Restriction
Status
Mass allotment:
<= your allotment
Volume allotment:
The payload’s center of gravity (CG):
In 1”X1”X1” envelope of centroid?
Wallops No-Volt Requirement Compliance:
Yes?
Structure mounts:
Top and bottom bulkheads. No mounts to sides of cans.
Sharing:
Fully developed?

22. Test Plans
What type of testing can be performed on your payload pre-flight?
What is required to complete testing?:
Support Hardware
Purchase/produce?
Software
Purchase/in-house?
Potential points of failure
Testing/Troubleshooting/Modifications/Re-Testing Schedule

23. Safety Update
What safety issues do you have that Wallops is concerned about?
Has this issue been resolved?
If yes… how?
If no… what is being done to mitigate the safety concern?
Don’t be too concerned about presenting every aspect of the issue here. Leave analysis for the backup slides or refer to an external document.

24. Management Updated Organizational Chart Updated Schedule
Updated mass/monetary budgets

25. Conclusions
Issues and concerns
Closing remarks

26. Backup Slides
Information and drawings not essential to the presentation, but that could be useful for tough questions
Data sheets, 2D drawings, additional schematics/diagrams, any design analysis completed, additional trade studies not presented.