Abstract
The nano-satellite and probe R&D project is being carried out at Osaka Sangyo University (OSU). The nano-satellite OSU-1 (cubesat 1U (0.1 m cube), 1 kg), equipped with an ultra-low power pulsed plasma thruster (PPT) system for orbit transfer and attitude control, is being developed for launch in 2025. The mission is long-range powered flight with changing an altitude of 10 to 50 km on the low earth orbit using the PPT system. If altitude control is successful with the 1U cubesat, the potential for small and nano-satellites, specially below 1U cubesat and with 1-3(6)U ones, will increase. In the present research and development, an experimental 1J/1W electrithermal-PPT is repetitively operated in 104 shots resulting in decrease in an impulse bit from 30 to 20 μNs/shot and achivement in a total impulse of 300 mNs, although more improvement of performance is needed for practical use. As for bus devices, a camera system, a buttery system and a solar panel etc were successfully desinged. Furthermore, a total distarbance torque of 0.512 μNm on 400 km in altitude was evaluated from aerodynamic. gravity tilt, solar radiation pressure and geomagnetic torques, resulting in suitable design of magnetic torquer for the cubesat OSU-1.
https://ror.org/01h2m4f20 
