Abstract
Analyzes the performances of closed-loop control systems when real hysteretic actuators (e.g., Terfenol-D-based devices) are of concern. Shown is a simple but effective strategy, based on the simple idea of pseudo-compensator, for transducer's hysteresis compensation. Such a strategy improves the control system's behavior, not only in terms of tracking error reduction but also in decreasing the control signal so as to avoid saturation and harmful stress to the actuator on the one hand and reducing hysteretic energy losses on the other. Experiments are performed on a magnetostrictive actuator used for a micropositioning task.
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