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Novel Iteractive Learning Control for PiezoElectric Actuators

Interesting article in the DSPE Magazine of this month (page 5/6):

Due to overshooting and hysteresis, the output curve from a piezoelectric actuator can differ from its input signal. The iterative learning control (ILC) method, as developed by piezosystem jena, determines the required setting curve by performing iterations and adjustments on measured curves. Besides the improvement of accuracy, ILC offers advantages such as the production of dynamic movement even above the system’s resonant frequency, and flexibility regarding changing conditions of, for example, load and temperature.
In addition, there is no longer a need for users to have their systems recalibrated. This brief article presents the algorithm and experimental results.

Read here !

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