Observer-based inverse hysteresis control of prototypical magnetic shape memory (MSM) actuator

The magnetic shape memory (MSM) alloys are well-promising for the controlled magnetic field-induced motion. This paper describes the observer-based inverse hysteresis control of a prototypic MSM based actuating element The MSM induced motion is a novel and challenging topic for mechatronics due to a high integrity of the magnetic and mechanical components as well as a complex nonlinear dynamic behavior to be controlled. A highly hysteretic and thereto non-deterministic (to the certain degree) response of the field-induced strain is the main challenge when regulating the MSM generated motion. The way, how the MSM type actuators can be controlled robustly using the observer-based inverse hysteresis approach is described and shown with experiments.