Implementation and control of the magnetic linear actuation system

The paper constructs a new magnetic actuation system to be used in platform support with accurate positioning and control for vibration isolation. To achieve the goal, tasks of dynamic modeling and analysis, hardware implementation, and performance tests are carried out. In the system configuration, the actuator drives the permanent magnet by generating magnetic force via two current-carrying coils. The magnetic force acting on the permanent magnet is practically measured from the magnetic field inside the actuator instead of calculating from the idealized formula. The dynamic model is built by analyzing the total force acting on the permanent magnet. Therefore a feedback control system is implemented from actuator, eddy current sensor, PID controller and PWM power amplifier. Tests including positioning control and vibration suppression, are conducted to examine the performance of the actuation system.