Stabilizing control of a 1-DOF electromagnetic levitation of pivoted-free rigid ferromagnetic beam

GA Optimized PI-PDN Robust Control of a 1-DOF Maglev Precision Position System

“…However, in this work, several amendments are carried out to attain precision positioning of the pivoted-free beam, with possible utilization in precision manufacturing or similar applications. The improvements are listed below: 1) Building upon the authors' earlier work [27] and taking a cue from the 2-DOF control architecture of Ghosh et al [19], this paper demonstrates several improvements. Notably, this research work employs a differential pair of electromagnets to levitate a ferromagnetic beam for precision positioning as opposed to a single electromagnet employed by many researchers for instance: to levitate a cantilever beam [22] for vibration control, to levitate a steel ball [17], [19], [28], [27], and in manufacturing processes [20], [21].…”

“…The improvements are listed below: 1) Building upon the authors' earlier work [27] and taking a cue from the 2-DOF control architecture of Ghosh et al [19], this paper demonstrates several improvements. Notably, this research work employs a differential pair of electromagnets to levitate a ferromagnetic beam for precision positioning as opposed to a single electromagnet employed by many researchers for instance: to levitate a cantilever beam [22] for vibration control, to levitate a steel ball [17], [19], [28], [27], and in manufacturing processes [20], [21]. Utilization of a pair of EMs topology enables linearization of the force-current relationship, thereby simplifying the controller synthesis process significantly.…”

“…This research aims to design a robust controller that can stabilize the 1-DOF Magnetic Levitated System (MLS) and attenuate the external vibrations concurrently by employing a pair of EMs. This work is the extension of the author's previous work on 1-DOF levitation of ferromagnetic beam [27], wherein a simple conventional PID controller was designed and implemented. However, in this work, several amendments are carried out to attain precision positioning of the pivoted-free beam, with possible utilization in precision manufacturing or similar applications.…”

“…Including the crucial bandwidth of the MLS leading to reduced ingress of sensor noise in the closed loop. 4) Importantly, here electro-magnet parameters forcedisplacement and force-current factors are experimentally determined unlike in [27] for improved control design.…”

Nonlinear control for an uncertain electromagnetic actuator

“…EMA are often controlled by linear control strategies such as Proportional Derivative controller (PD) [7], Proportional Integral Derivative controller (PID) [8] or Linear Parameter Varying (LPV ) [9], Model Predictive Control (MPC) [3] and Linear Quadratic Regulator (LQR) controllers [10]. In [7] and [3], a common approximation of the electromagnetic force F mag = B 2 S 2µ 0 is considered. Such simplification may be valid when the magnetic circuit is neglected and only airgap surface are considered.…”