Design and simulation of miniaturized direct linear motors for artificial muscle fibers

Abstract

Artificial muscle fibers and compliant actuators are generating increasing interest from several advanced robotics applications. In this paper, we propose an integrated linear actuator design based on the synchronous linear motor concept and provide simulation data to assess its potential performance. The actuator is designed to be modular, scalable, flexible, devoid of permanent magnets, and physically structured to mimic natural muscle fibers. We use a straightforward actuation protocol to compare the force, stroke and other performance characteristics of the actuator with biological muscles. The thermal behavior is also simulated, including the effects of an integrated microfluidics cooling system that allow the force to mass ratio of a structure to increase. Results indicate such approach as a possible promising route to develop muscle like actuators in the framework of microelectronics technology.