Magnetic cleanliness and in-flight identification and rejection of residual magnetization effects for a magnetically controlled 3U CubeSat are considered. The routine we propose starts from accurate acquisition of all the components' magnetic fields at the stage when the engineering model of the spacecraft is ready. This allows making a map of the assembled CubeSat's internal magnetic fields using electromagnetic simulation and analysis software. Such maps can be produced for each operational regime of the spacecraft and compose a magnetic atlas in accordance with the concept of operations. By feeding the maps to the extended Kalman filter, which processes the magnetometer data and estimates the residual magnetic dipole and the magnetometer bias along with the state variables, we ensure a better initial guess for the disturbances, which is crucial for the filter's convergence. It is shown to be of importance, whenever the level of magnetic disturbances abruptly changes as the spacecraft switches between the regimes.
|Journal||Proceedings of the International Astronautical Congress, IAC|
|Publication status||Published - 2020|
|Event||71st International Astronautical Congress, IAC 2020 - Virtual, Online|
Duration: 12 Oct 2020 → 14 Oct 2020
- Disturbance identification
- Magnetic control
- Residual magnetization