This thesis investigates autonomous orbit control strategies for CubeSats, a class of miniaturized satellites, focusing on station-keeping maneuvers within Sun-synchronous low Earth orbit scenarios, particularly relevant for Earth observation missions. The main challenges posed by low-thrust contiguous-throttle electric propulsion are addressed, proposing control solutions able to deal with maneuver slot constraints and offering a more efficient fuel consumption compared to traditional chemical propulsion. The primary objective of this study is the design and implementation of orbit control algorithms, and their validation through mission simulations. Specifically, the thesis work comprehends the development of an orbit control simulator, implemented with Python programming language, tailored for autonomous space missions.