Radio Interface Board Status

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Presentation transcript:

Radio Interface Board Status Corentin Lubeigt October 22st, 2019

Overview Board between the Central Stack and Radio + Transponder stack Functionalities: Convert VBAT (direct from battery) to 12V for the Radio Convert VBAT to 5V (with on/off feature) to 5V for the Transponder Current and voltage sensing of 12V and 5V with a I2C ADC Forward data signals (CAN for Transponder, UART for Radio) Process and forward Firecode generated by Radio to the EPS 10/22/2019

10/22/2019

Status Version 2.1 soldered, tested through TVAC Radio powered with the Radio IFB in the middle 10/22/2019

Open issues and solutions Problem on 5V lines: 5V is shared by MirrorSat, PIC and MirrorBox. The two last are microcontroller and cannot stand a too low input voltage. When current drawn increases, we observe voltage drop. Test different switches to pick the most efficient one to minimize voltage drop through the board Cable analysis and design to estimate the voltage drop (through Central IFB to Y IFB harness and and through Y IFB to MirrorBox harness) 10/22/2019

Forthcoming steps Solder new IFB when it comes in Functional test with actual cable length TVAC final version of IFB Integrate to FlatSat Order FM boards 10/22/2019

+/-Y Interface Boards Status Corentin Lubeigt October 22st, 2019

Overview Board between the Central Stack and Solar Panels, MirrorBox, the Payload Interface Computer and its electromagnet boards Functionalities: Provide 5V switched to PIC, MirrorBox and MirrorSat (this one isolated) Generate UART from I2C to talk to the MirrorBox On-board temperature sensing Interface with Solar Panels, ADCS (coarse sun sensor) and EPS (ACU) Burnwires mechanism for antenna deployment 10/22/2019

10/22/2019

Status Version 6.4 soldered and tested Next version (v7.x) ordered Most of the board passed save the 5V lines (see next slide) Next version (v7.x) ordered -Y interface board serve as a EM for the +Y interface board 10/22/2019

Open issues and solutions Problem on 5V lines: 5V is shared by MirrorSat, PIC and MirrorBox. The two last are microcontroller and cannot stand a too low input voltage. When current drawn increases, we observe voltage drop. Test different switches to pick the most efficient one to minimize voltage drop through the board Cable analysis and design to estimate the voltage drop (through Central IFB to Y IFB harness and and through Y IFB to MirrorBox harness) 10/22/2019

Forthcoming steps Solder new IFB when it comes in Functional test with actual cable length TVAC final version of IFB Integrate to FlatSat Order FM boards 10/22/2019

Central Interface Board Status Fabien Royer - Charles Sommer – Corentin Lubeigt – Thibaud Talon October 22st, 2019

Overview 4 layers board in central stack: Functionalities: Top layer: data and low power lines Middle top layer: high power lines Middle bottom layer: ground Bottom layer: data and low power lines Functionalities: 10/22/2019

Status Received first version of the board and components 10/22/2019

Open issues and solutions So far no issues detected 10/22/2019

Forthcoming steps Solder components on board Perform functional test on board 10/22/2019

Flight Preparation Panel Board Status Corentin Lubeigt October 22st, 2019

Overview Board meant to access the Central stack PC104 from the outside of the spacecraft. It is the main interface between test engineer and the spacecraft Functionalities: route all the PC104 lines from the PC104 of the central stack the outside of the spacecraft Data lines to be monitored (UARTs, I2Cs, CAN, SPI, GPIOs) Power lines from the EPS Probed lines from the Central IFB 10/22/2019

Status First version ordered 10/22/2019

Open issues and solutions No issue so far for the board has not arrived yet 10/22/2019

Forthcoming steps Solder new IFB when it comes in When Central stack is assembled, plug it in and let it be the only interface used for testing 10/22/2019