phoenix-gs

Phoenix ground station with Arduino
Works with the launch box to send valve control signals with protected logic

Launch Control Loop Logic

• One of the following mode will be ran during each void loop() call

Launch Mode (Risk: Low)

Launch sequence has four stages
Each stage is coded by a six digit binary representation
Each two digits representation:

• 00: flow valve close, vent valve close
• 10: flow valve open, vent valve close
• 10: flow valve close, vent valve open
• 11: forbiden state, cannot open flow and vent at the same time

From left to right, each two digits represents the state for:
(arm | fuel valve 1 | fuel valve2 )
Each state has two valves: flow valve and vent valve

PRE-ARM (00|00|00)

• default state, nothing happens
• all valves closed

ARMED (10|00|00)

• arm flow valve open

ABORT (01|01|01)

• open vent valves for all
• emergency break, abort the mission

LAUNCH:(10|10|10)

• after arm flow valve is opend
• open the flow valevs for both fuels
• rocket launching, no way back

Buttons/Swithces

• Abort (button): has highest priority, open vent valves for all
• Arm (switch): open/close arm flow valve
• Launch (button): open fuel 1&2 flow valves

Launch Control - Fueling Mode (Risk: Medium)

• In fueling mode, all flow valves are locked in OFF mode
• all vent valves can be controlled by individual switch

Launch Control - Dev Mode (Risk: High)

• This mode is intended for testing valve openings before fueling
• All valves are free to be switched on and off
• Be very sure of what you are doing when using this mode

Fuel and valve diagram

Draw.io Link

• https://drive.google.com/file/d/1tbEu6RL3mTaqcmE_wz8DDxYVTB-fJ5dZ/view?usp=sharing

Launch Terminal Physical Specifications

Ethernet

W5500 Ethernet LAN Network Module

Resource

• https://github.com/njh/W5500MacRaw