A cutting edge 6U CubeSat ADCS design for Earth observation with sub-meter spatial resolution at 230–380 km altitude
| Autor: | Dennis Dolkens, Hans Kuiper |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Angular momentum Earth observation Spacecraft business.industry Magnetic bias momentum wheel Aerospace Engineering 6U CubeSat Reaction wheel Magnetorquer Electrically powered spacecraft propulsion Space and Planetary Science Orbit (dynamics) Sub-meter spatial resolution CubeSat Astrophysics::Earth and Planetary Astrophysics Aerospace engineering Cutting-edge ADCS business |
| Zdroj: | CEAS Space Journal, 12(4) |
| ISSN: | 1868-2510 1868-2502 |
| DOI: | 10.1007/s12567-020-00323-7 |
| Popis: | A 6U CubeSat for Earth observation in 230–350 km orbits with sub-meter resolution is presented. The proposed Stable and Highly Accurate Pointing Earth-Imager (SHAPE) system’s attitude determination and control system (ADCS) is composed of a single momentum bias wheel with magnetic bearings at rotational speeds of 6000–7000 rpm and refined magnetorquers. Reaction wheels as instability source are absent. The ADCS stabilizes the spacecraft attitude by counteracting the torques from external disturbances in the thermosphere down to 2 magnetorquer dipole moment provides with low power consumption, mass and cost, high reliability and sufficient torque. The ADCS initialisation study revealed three stable start-up modes, while the all-spun state is achieved using a set of thrusters. De-tumbling analysis show that the magnetorquers reduce the tumbling rates with magnitudes of up to 35°/s to mean motion values in less than an orbit using a static gain B-dot controller. A 3U camera design capable of sub-meter spatial resolution at 230 km altitude is presented which complies with the SHAPE spacecraft system design. The instrument has a single deployable primary mirror enabled by a deployment hinge design with hysteresis |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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