Study on the position control of the e-actuator for e-VGT

The e-VGT (electrical Variable Geometry Turbocharger), a kind of turbocharger is a electronic device that controls the flow rate and amount of exhaust gas. Therefore, the position of the actuator must be controlled quickly and accurately. To control the position of the e-actuator, the authors use PI control on a position controller including a current controller. However, since the e-actuator has big friction and spring force, a general PI controller isn´t suitable for the e-actuator. To solve the problem, they find mechanical modeling of the e-actuator. And using the mechanical modeling, the controller that is suitable for the e-actuator is made.