This paper discusses the software for a satellite inertial autonomous self-correcting attitude determination and control system (ADCS). The mathematical models used and the challenges that have arisen are discussed. The ADCS has to automatically update its control profile after deployment, continuously, compensating for a potentially changing center of mass and removing the requirement to test the system in the orbital environment to develop the initial profile. Rough estimation is provided by the accelerometers and solar cells and refined using an outward facing star sensor. A limited functionality mode fallback, low computational power and environmental exploration mode has also been developed.
Mark McDonald and Jeremy Straub, "Development of a small satellite primarily inertial autonomous self-correcting attitude determination and control system (Conference Presentation)," Proc. SPIE 10195, Unmanned Systems Technology XIX, 101950A (Presented at SPIE Defense + Security: April 11, 2017; Published: 12 June 2017); https://doi.org/10.1117/12.2263953.5459357463001.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon