BillikenSat – II Pico-Satellite that conforms to the CubeSat standard Team Leader: Darren Pais Electrical Eng.: Ben Corrado Payload: Rob Arechederra MISSION: The BillikenSat-II team will develop a working prototype Pico-satellite that conforms to the CubeSat standard, and one that incorporates Bio-Fuel cell test experiment as our payload. We will, after rigorous testing and verification of our design, build a flight ready version of BillikenSat-II, in preparation for launch in Nov Presentation at The Boeing Company- Feb 5, 2007

Agenda for today Introduction Payload Aerospace Electrical Overview of mission experiment Brief description and progress in key areas:  Aerospace Engineering Structures Attitude Determination and Control Thermal Analysis  Electrical Engineering Power System Communication System Computer Engineering, data handling

Introduction Payload Aerospace Electrical Payload Concept Enzymes V Platinum Anode Cathode H+H+ Nafion 112 H+H+ O2O2 H2OH2O e-e- e-e-

Introduction Payload Aerospace Electrical Payload Fuel Cell Bipolar Plates Gold Plated SS-416 Membrane MEA=Nafion ® & Carbon Electrodes Fuel Ethanol, Glycerol, sugar,etc In our satellite: Flat Beer Beer Enzymes Anode Catalyst Platinum Cathode Catalyst Nafion ® Ion Exchange Membrane

Introduction Payload Aerospace Electrical Biofuel Cell Fuel Energy Density (Whr/L) Bio-Fuel (beer) compared to other batteries

Introduction Payload Aerospace Electrical Biofuel Cell Fuel Energy Density (Whr/L) Comparison between different Bio-Fuels

Payload Engineering Introduction Payload Aerospace Electrical Threaded Plug Problems Addressed: 1) Thermal 2) Pressure 3) Data acquisition

Structures- Putting things together Introduction Payload Aerospace Electrical (1) Main Structural Bus(2) Exploded View(3) Assembled Satellite

Introduction Payload Aerospace Electrical System Interface Diagram

About CubeSat Introduction Payload Aerospace Electrical Launch Site: Baikonur Cosmodrome, Kazakhstan 3 P-PODS: each containing 3 CubeSats Integration handled by CalPoly, San Luis Obispo Constraints: 1kg, cube 10cm side Participants include universities from around the world

Orbital Simulation Introduction Payload Aerospace Electrical

Interfaces Introduction Payload Aerospace Electrical C&DH PIC 18 Power Battery Array Battery Chargers Solar Array 5V7V3.3V ADCS Thermal ControlPayload Monitoring Communications Rate Gyro X Rate Gyro Y Rate Gyro Z Heater Thermalcouple Control Switch Transceiver Power Amp Antenna Control Switch A/D Conv. Data Unregulated Bus 3V Bus 5V Bus 7V Bus

Electrical Engineering Introduction Payload Aerospace Electrical Power: –Lithium Ion Batteries –Power distribution layout completed Communications: –Antenna design –FSK transceiver C&DH: –Onboard data collection and computing. –Microprocessor PIC18 Typical EE board with components System Constraints –Max Bus Voltage (5-7 Volts Peak) –Operating frequency (approx. 433 MHz) –Electromagnetic interference

Introduction Payload Aerospace Electrical