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

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

Overall System Diagram

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

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.

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

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.

PCU Schematic (Functional)

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.

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

Test Stand Test Outline

Test Stand Test Setup

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

Test Stand Bill of Materials Removed T/C Updated price of PX309 as per Omega’s website BoM total: $446.78  $422.78 Verified USB-6008 & myDAQ availability w/ Dr. Kempski

Test Stand Test Planning

Questions