Process / pipelineAttitude Control
B-Dot Controller
The B-Dot controller (magnetic B-dot control law) is a simple, robust spacecraft attitude control method that uses the rate of change of Earth's magnetic field measured onboard to generate a magnetic dipole moment. Developed in the 1980s, the B-Dot law damps spacecraft angular momentum without requiring a complex attitude estimate or external reference, making it ideal for initial momentum dumping after launch or in contingency scenarios. B-Dot is passive, simple to implement, and effective.
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Sources
- Wertz, J. R. (Ed.). (2002). Spacecraft Attitude Determination and Control. Kluwer Academic. DOI: 10.1007/0-306-47602-3 ↗
- Sidi, M. J. (1997). Spacecraft Dynamics and Control: A Practical Engineering Approach. American Institute of Aeronautics and Astronautics. DOI: 10.2514/4.861604 ↗
- Crassidis, J., Markley, F. L., & Lightsey, E. G. (2006). The Developing Art of Spacecraft Attitude Determination. IEEE Aerospace and Electronic Systems Magazine, 21(4), 30–34. DOI: 10.1109/MAES.2006.1635266 ↗