Topology Optimization of Annular Lorentz Force Actuator for Non-Contact Annular Electromagnetic Stabilized Spacecraft

As the core actuator to ensure the high-precision attitude control of the non-contact annular electromagnetic stabilized spacecraft, the annular Lorentz force actuator (ALFC) plays a pivotal role in control system due to its advantages of rapid response and high accuracy. This study proposes a topology optimization to transcend the traditional design paradigms. First, a solid isotropic material with penalization (SIMP)-based optimization model is constructed, which incorporating magnetic flux density distribution into the objective function and establishing a material interpolation model for annular magnetic circuits and coil configurations. Second, the method of moving asymptotes (MMAs) algorithm is employed to solve the non-convex optimization problem. Finally, through finite element simulations, the optimization results are quantitatively assessed, ultimately identifying a novel ALFC structure that satisfies both precision and intensity requirements for engineering applications, which provides a novel design paradigm for non-contact annular electromagnetic stabilized spacecraft.