A Study on Electromagnetic-Spring Actuator for Low Cost Miniature Actuators

Kim, Sewoong; Lee, Changseop; Choi, Hyunyoung

doi:2019.22.3.392

J. KIMS Technol > Volume 22(3); 2019 > Article

Research Paper

Journal of the Korea Institute of Military Science and Technology 2019;22(3):392-400.
DOI: https://doi.org/10.9766/KIMST.2019.22.3.392

A Study on Electromagnetic-Spring Actuator for Low Cost Miniature Actuators

Sewoong Kim, Changseop Lee, Hyunyoung Choi

The 1st Research and Development Institute, Agency for Defense Development

소형 및 저비용화를 위한 전자석-스프링 구동장치 연구

김세웅, 이창섭, 최현영

국방과학연구소 제1기술연구본부

Abstract

This paper provides a fin actuation system of missile based on electromagnetic-spring mechanism to miniaturize the system and lower the cost. Compared with proportional electro-mechanical actuators, the output of Electromagnetic-Spring Actuators(EMSA) has two or three discrete states, but the mechanical configuration of EMSA is simple since it does not need power trains like gears. The simple mechanism of EMSA makes it easy to build small size, low cost, and relatively high torque actuators. However, fast response time is required to improve the dynamic performance and accuracy of missiles since bang-off-bang operation of EMSA affects the flight performance of missile. In this paper the development of EMSA including parameter optimization and mathematical modeling is described. The simulation results using Simulink and experimental test results of prototype EMSAs are presented.

Key Words: Electromagnetic-Spring Actuator, Electromagnetic Force, Flux Density, Spring Force