Tracking position control of piezoelectric actuators for periodic reference inputs

Repetitive tracking position control on LonWorks/IP network with time varying delay

“…Choi et al [22] implemented the discrete time repetitive control on the piezoelectric actuators. Lee et al [23] developed the model-based predictive control approach to repetitive control of continuous processes.…”

“…Thus, addition of a low pass filter -1 ( , ) M z z into the periodic signal generator G α is needed [22]. A simple low pass filter described by …”

Design of hysteresis-compensating iterative learning control for piezo-positioners: Application to atomic force microscopes

“…This is particularly important for piezo-systems because the model can change over time, say due to aging effects. Furthermore, as in any feedforward control approach, ILC can be augmented with feedback control for additional improvement in the positioning performance, say to account for external perturbations, or to stabilize the positioning system [15,16]. This method can also be used in conjunction with other approaches to reduce hysteresis in piezos, such as charge control methods [17].…”

Model reference adaptive control for a piezo-positioning system

“…Croft and Devasia [12] applied an inverse polynomial model in the feedforward loop to cancel the hysteresis and designed a PD feedback controller to achieve the tracking task. Choi et al [13] presented a PID control augmented with feedback linearization loop in which the feedback linearization loop used a plant model drawn from the Maxwell slip model. It indicated that the tracking performance can be further improved by adding repetitive controller when the PZT actuator is subject to the periodic reference input signal.…”