Open Source Design: Corvus-BC Spacecraft. Brian Cooper, Kyle Leveque 9 August 2015

Transcription

1 Open Source Design: Corvus-BC Spacecraft Brian Cooper, Kyle Leveque 9 August 2015

2 Introduction Corvus-BC 6U overview Subsystems to be open sourced Current development status Open sourced items Future Rollout 2

3 Our Background 17-person team in Silicon Valley Core engineering team worked at Canopus Systems 100% of current team completed Perseus-M mission Broad range of experience in the space industry Now focused on generating 22m and 2.5m multi-spectral Earth imagery SRI RAX 1 LightSail SSL-ABS2 Perseus-M AMSAT OSCAR Series 4/23/15 3

4 Current Projects Perseus-M Launched in June x 6U Automatic Identification System (AIS) CubeSat Characterizing AIS payload performance On-orbit test bed for future missions Corvus-BC Launch Q x 6U Earth observation CubeSat Multispectral: Red, Green, NIR 22 m ground resolution (GSD) Corvus-HD Launch Q x 16U Earth observation CubeSat Multispectral: Red, Green, Blue, NIR, Red Edge 2.5 m ground resolution (GSD) 4/23/15 4

5 Corvus-BC Overview 6U Form-factor 11 kg Imaging solution: 22 m GSD at 600 km, Red, Green, NIR spectral bands Flight computer: ARM A8 running Linux Power system: scalable 48Wh Li-Ion Communication: UHF transceiver running at 19.2 kbps for TT&C. Payload data is downlinked through Ka-band at 40 Mbps Solar panels: ARM M0+ processor, temperature, magnetometers sun sensors and magnetorquer coils Control: 3-axis with three reaction wheels, star tracker, GPS, gyro, magnetometers, and sun sensors Storage: 1 TB 5

6 System Block Diagram 6

7 Corvus-BC Overview Smart Solar Panels Multi-spectral Imager Batteries Ka-Band Radio ACS Module Flight Computer, EPS, Radios ( The Rack ) 7

8 Corvus-BC Overview Data & Power Module ( The Rack ) Flight Computer UHF Radio GPS Radio EPS boards Batteries (48 Wh) Multi-spectral Imager Open volume for future use (Propulsion!) Ka-Band Radio ACS Module 8

9 Corvus-BC Overview EPS Boards (Aquila Space) TT&C radio (AstroDev Lithium) Flight Computer (Aquila Space) GPS (Novatel OEM615) Batteries (Aquila Space) Reaction Wheels Sinclair 30mN-sec Star Tracker Sinclair ST-16 9

10 Corvus-BC Overview Custom Ka-band transmitter 1U, 1 kg Currently 40 Mbps Planned upgrades to >200 Mbps Simple interface Ethernet UDP/IP packets in UDP/IP over DVB-S2 packets out On-orbit testing in progress See Jan s presentation on Tuesday afternoon for more! 80# 75# 70# Ka<band%Tracking%Loop%C/No%Measured%in%10kHz%BW% 65# C/No%(dBHz)% 60# 55# 50# 45# 40# 35# 8:24:20# 8:24:35# 8:24:50# 8:25:05# 8:25:20# 8:25:35# 8:25:50# 8:26:05# 8:26:20# 8:26:35# 8:26:50# 8:27:05# 8:27:20# 8:27:35# 8:27:50# 8:28:05# 8:28:20# 8:28:35# 8:28:50# 8:29:05# 8:29:20# 8:29:35# 8:29:50# 8:30:05# 8:30:20# 8:30:35# 8:30:50# 8:31:05# 8:31:20# 8:31:35# 8:31:50# 8:32:06# 8:32:21# 8:32:36# 8:32:51# 8:33:06# 8:33:21# 8:33:36# 8:33:51# 8:34:06# 8:34:21# 8:34:36# 8:34:51# 8:35:06# 8:35:21# 8:35:36# 8:35:51# 8:36:06# 8:36:21# 8:36:36# 8:36:51# 8:37:06# 8:37:21# 8:37:36# Day%161%of%Year%2015;%UTC% 10

11 To be open sourced Data & Power Module ( the rack ) Full EPS Full Flight Computer GPS and UHF Structure, Interfaces, System Software Solar Panels Star-tracker & Reaction Wheels (Structure, Interfaces, System Software) 11

12 Development Status Corvus-BC hardware design work is completed Flight assembly underway Launch is scheduled for Q Already preparing design improvements (backup radio, propulsion, etc.) 12

13 Software Development Core Flight Computer functions ready EPS control using MicroPython in final development stages Solar panel, UHF, GPS, Star Tracker, and Reaction Wheel drivers completed ACS development in process on-orbit Plenty of potential improvements remain! Aquila performs on-orbit updates regularly, so it s never too late for an upgrade 13

14 Platform Upgrades: Corvus-HD Upgraded bus to be used for Corvus-HD, launching Q U, 20 kg platform Improved ACS accuracy and availability >200 Mbps data transfer with adaptive MODCOD Miniaturized Ka Transmitter assembly S-Band, UHF, and backup TT&C radios included Doubled battery capacity (96 Wh) 14

15 Technology included The following technologies will be open sourced: Source Code Schematics (Altium) PCB Layout files (Altium) Bill of materials Drawings (Solidworks) Part files (Solidworks) online now! Testing procedures Assembly procedures Harness diagrams GPL License (add assembly procedure) 15

16 Example: Assembly Procedures Unambiguous assembly procedures Can be used without modification, or just as a reference for design methodology Language barrier-proof format 16

17 Example: CAD Models and Drawings ICDs provided for full spacecraft, as well as subsystems Even closed source units like Ka-band have models This allows for easier interfaces with user-specific designs Ka-band ICD and model are now available at aquilaspace.com 17

18 Look for early adopters We are actively looking for early adopters Universities Companies Individuals Future directions (let s brainstorm!) New ADCS algorithms Propulsion Firecode/backdoor spacecraft reset receiver S-band receiver Ground segment (software & hardware) What else?... 18

19 Questions?