Nonlinear Resonance in a Magnetic-Spring-Based Solenoid-Driven Electromechanical Actuator

A magnetic-spring-based solenoid-driven electrome-chanical actuator works on electromagnetic principles to drive a levitating magnetic plunger in a linear path in response to changes in the input electrical signal driving the solenoid. Fast response time and precise linear control make it a handy prospect for various practical applications. This research investigates the nonlinear behaviour of a magnetic-spring-based solenoid-driven actuator under various excitation inputs. The actuator under study shows the phenomenon of jump resonance and spring softening effects under the frequency sweep tests. Furthermore, we present an attempt to find a system model to describe the behaviour of the actuator.