Solar Sail Design and Qualification The （太阳帆设计和资格）.pdfVIP

LightSail-1™ Solar Sail Design and Qualification Chris Biddy, Stellar Exploration Inc. 41st Aerospace Mechanism Symposium LightSail-1™ Introduction • Project of The Planetary Society • Completely privately funded through member donations Objectives are to: • Demonstrate viability of Solar Sails – Ability to alter orbit energy in positive direction – Ability to manage orbital energy – Ability to control spacecraft under solar sail power • Develop and demonstrate key technologies – Sail deployment – Sail material management during flight – Gossamer structure dynamics • Demonstrate pathway to deep space with solar sails Requirements are to: • Achieve greater sail area/mass than COSMOS-1 ACS Orbit Raising Mode • Orbit raising will be accomplished by 90 degree pitch maneuver • 800 km orbit needed for SRP Aerodynamic Drag LightSail-1™ Design Challenges • How to package the sail and booms in the allowable volume • How to manage boom strain energy while stowed and during deployment • How to control the sail deployment • How to constrain sail material and booms prior to deployment (including during launch) • How to manage sail material during deployment LightSail-1™ Configuration • 3U CubeSat Spacecraft organized into 3 sections • Avionics Section/Sail Storage (~2U) – Contains Avionics Board, radio, Sensor Interface board, Battery Pack, 3- single axis MEMS Gyros, 3 Torque Rods, 1 Momentum Bias Wheel, a 3 axis accelerometer, and sail storage cavity • Deployer Section (~0.5U) – Houses 4 x 4 meter TRAC booms • Payload Section (~0.5U) – Houses boom drive motor and gear train, storage area for camer