Multi-objective design optimization of electromagnetic coil for effective actuation of magnetic endocapsule devices

Abstract

Magnetic actuation with cylindrical electromagnetic coils is an upcoming technology due to its straightforward design and adaptability for magnetic endocapsule control in the gastrointestinal tract. This paper presents a mathematical model for characterizing the magnetic field generated by cylindrical electromagnetic coils and optimizing design parameters tailored for a typical 6.50-gram magnetic endocapsule. This paper adopted a dual-set parallel cylindrical electromagnetic coil configuration. The cylindrical electromagnetic coil design was conceptualized as a multi-objective optimization problem, which concerns geometrical parameters and copper winding usage, resolved through the amalgamation of a genetic algorithm and a Pareto optimal methodology. The optimal design produces an actuation force of 132.20 mN for a 6.50-gram magnetic endocapsule, and the results are validated with finite element simulations. The adopted and optimized system configuration has a average motion resolution of 2.7 mm and an average motion velocity of 162 mm/min.