1. Critical Design Review
Arc-Jet Thruster
P17101
Adam
February 2, 2017

2. Post DDR Notes/Agenda Operational safety requirements
Complete of electrical design
Draft testing plans

3. Overall System Diagram

4. Assorted Updates Loss of team member – David Yin (EE)
Located testing lab – Engine test cell in machine shop
Parts are in the shop awaiting fabrication
Meeting with EHS on Feb-09 to discuss operational safety

5. PCU Updates
Added a 24V power supply for the solenoid and for the DAQ controls
Using a single capacitor on the high current side to keep the power consumption down.
Removed contactor from circuit.

6. Capacitor Removal Resistors in series put us in 25-30Ω range
Removing the voltage doubler keeps system under 1kW operating power.

7. DAQ Control
The DAQ has a limited output current, not enough to activate a relay.
Use MOSFETs to turn relays on using the DAQ input.

8. PCU Schematic (Functional)

9. PCU Schematic (Physical)
¾” Plywood base
¾” Plywood walls
Components to scale.
Max dimensions: 18” x 24” x 7”
Components mounted to
sheet aluminum as required.

10. Test Stand DAQ Setup
Removed T/C to reduce # of AI channels needed to 4

11. Test Stand Test Outline

12. Test Stand Test Setup

13. Test Stand Sensor Selection
Estimated force seen by load cell remains unchanged
Chamber pressure estimated in the 20-30psig range: 100psig sensor selected

14. Test Stand Bill of Materials
Removed T/C
Updated price of PX309 as per Omega’s website
BoM total: $  $422.78
Verified USB-6008 & myDAQ availability w/ Dr. Kempski

15. Test Stand Test Planning

16. Questions