스티어링 휠의 운전자 진동 피드백 성능향상을 위한 선형 공진 액추에이터의 해석기반 설계 연구 = Analysis-Based Design of a Linear Resonant Actuator for Enhancing Driver Vibration Feedback in Steering Wheels

다국어 초록 (Multilingual Abstract)

This study presents an integrated electromagnetic-structural design of a linear resonant actuator(LRA) for steering-wheel haptics, and verifies a high-acceleration target through an agreement between simulation and experimentation. A single degree of freedom model showed that peak acceleration scaled with the force-to-damping ratio, quantifying the force-damping trade-off. Parametric analysis determined the minimum required force, and magnetostatic finite-element analysis with nonlinear B-H curves predicted a thrust of 0.107 N; consequently, H and B field maps confirmed the saturation margin and current-thrust linearity. Furthermore, modal and frequency-response analyses identified the first translational mode. A component test under cushion and jig boundaries achieved 134 dB acceleration and an 8.9 % damping ratio. Using these data, the numerical response predicted 84 Hz and 134.83 dB, which were within 5 % of the measurement. Thus, the workflow is robust to assembly-induced damping, and delivered approximately 20-fold higher responsiveness than ERM motors, with faster rise time.