380 likes | 955 Views
CubeSats. NASA-Olin Summer Research SOS and ACS Teams. What are CubeSats?. Small pico-satellites Size: 10 cm x 10 cm x 10 cm (1 liter volume) Mass: 1 kg
E N D
CubeSats NASA-Olin Summer Research SOS and ACS Teams
What are CubeSats? • Small pico-satellites • Size: 10 cm x 10 cm x 10 cm (1 liter volume) • Mass: 1 kg • Developed by Stanford University and California Polytechnic Institute as an economical means for universities to launch their own satellites • Standard set of off the shelf components available
Deployment Mechanism • P-POD: Poly Picosatellite Orbital Deployer • Developed by Cal-Poly • Simple, robust design easily mountable on most launch vehicles • Can deploy up to 3 cube sats in 1 P-POD
Advantages of CubeSats • Comparatively cheap • Able to launch a small satellite into space for approx. $40,000 • Allows universities to develop their own satellite missions • Standard deployment mechanism • Drives innovations in size of space computer and sensor technology • Over 80 universities and 7 corporations currently working on CubeSat projects
Past CubeSat Missions • First mission launched June 30, 2003 • Of the 6 CubeSats launched, only 2 were contacted • Since then, there have been 31 CubeSats launched
Sun-Sensor UMBC-GSFC Cube Sat • Working with team from UMBC and Goddard Space Flight Center on a CubeSat for imaging clouds.
Cloud-Side Profiling ice Temperature Water ice Aerosol Impact in Microphysics? mixed phase Water-ice processes water Collision-Coalescence
Radiator face Cloud CubeSatOrbit Geometry:
Attitude Control System Dan Grieneisen Jacob Izraelevitz Christina Powell Lorraine Weis
What is Attitude? • Roll, pitch, and yaw.
Our Cubesat • Photograph clouds • Radiate heat • One picture per orbit • Altitude of 650 km
Control with Magnetorquers • Rely on Earth’s magnetic field • Non-holonomic about axis along magnetic field • Magnetometer to evaluate field • Replace flywheels
Model Simulator (Plant) Coil Voltages B, S Control Algorithm
Prototype Design • Mechanical Design • Building plastic frame in shop • Winding coils this week • Hardware Design • PIC as I/O device, run control algorithm off computer
Initial Prototype • Complete machining • Design tests • Apply control algorithm to prototype
Final Prototype • Integrate ACS with SOS • Settle on final design specifications • Design and machine parts • Test
Deliverables • CubeSat prototype integrated with SOS • Prototype demonstration • Executes all 4 control tasks • Not tested with time/power requirements • Control software and manual • Final Report
Just for Fun http://www.cubesat.auc.dk/anim/cubesat_2tie.avi