Nonlinear control for an uncertain electromagnetic actuator
For control engineers working on electromagnetic actuators, this work addresses a commonly neglected magnetic phenomenon, but the contribution is incremental.
The paper designs a nonlinear control law for electromagnetic actuators that accounts for flux fringing, using a combination of backstepping and sliding mode control. Simulation results demonstrate the effectiveness of the approach.
This paper presents the design of a nonlinear control law for a typical electromagnetic actuator system. Electromagnetic actuators are widely implemented in industrial applications, and especially as linear positioning system. In this work, we aim at taking into account a magnetic phenomenon that is usually neglected: flux fringing. This issue is addressed with an uncertain modeling approach. The proposed control law consists of two steps, a backstepping control regulates the mechanical part and a sliding mode approach controls the coil current and the magnetic force implicitly. An illustrative example shows the effectiveness of the presented approach.