Design and Analysis of Wide-Bandwidth Actuator for Haptic Controller With Novel Magnetic Circuit

This study proposes a new actuator for a haptic controller that has a wider bandwidth than that of the prototype. The acceleration on the dummy jig of the prototype is analyzed using the electromagnetic-mechanical coupling method and verified using the experimental results. Several new designs have been proposed to provide higher accelerations on the dummy jig and a wider bandwidth. The new magnetic circuit, called the “sandwich” structure, includes one top plate, two permanent magnets, and two yokes. Response surface methodology is employed to perform the optimal analysis to find the maximum force factor while maintaining a magnet volume similar to that of the prototype. The predicted values (force factor and magnet volume) are confirmed by the analysis results of the optimal type. Compared with the prototype, the optimal type has a higher force factor (77.74%) and 417.24% improvement in bandwidth with the same outer dimensions.