Research on the 2-degree-of-freedom electromagnetic actuator in space

Abstract

To meet space science experiments in micro-gravity environment, micro-spacecraft vibration isolation technology was developed in recent years. A new kind of 2-degree-of-freedom electromagnetic actuator based on Lorentz principle was developed in this article. The composition and working principle of the actuator were introduced, the parametric model for electromagnetic actuator was established, the structural optimization was carried out with the help of genetic algorithm in the MATLAB toolbox, and the final optimal structural parameters were obtained. For achieving the magnetic induction intensity in radial and axial directions, theoretical model for electromagnetic characteristics of the 2-degree-of-freedom actuator was established, and the expression for electromagnetic force was obtained. A static electric-magnetic coupling simulation of the whole actuator and also the experiments for measuring magnetic induction and magnetic force were carried out, and the correctness of theoretical model was verified.

A 2-DOF Impact Actuator for Haptic Application

“…Most of the magnetic force-driven haptic actuators have rather simple structures for the sake of compact size, which constrains them to have only a single degree of freedom for haptic impact. Due to the design complexity, few studies have proposed multi-DOF haptic impact actuators based on magnetic force [4][5][6].…”