3D micro-structures folded by Lorentz force

Abstract

We've made a spatial micro-structure by folding at elastic hinges. However, the micro-folding causes the difficulties, e.g. hard access, a time-consuming task, and damage to the structure. In this report, we propose installing micro-actuators on a microstructure to fold it out of a planar structure. The actuator is based on the Lorentz force, which acts on a current in a magnetic field. This actuator can be made simply by using an external magnetic field. The amplitude of the Lorentz force can be controlled by either the current or the magnetic field. Also, the direction of the force can be controlled by the direction of the field.