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The design of a position-based repetitive control for speed ripple reduction in PMLSMs (2017)
Conference Proceeding
Tang, M., Formentini, A., Odhano, S., & Zanchetta, P. (2017). The design of a position-based repetitive control for speed ripple reduction in PMLSMs. In Proceedings IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society (3688-3692). https://doi.org/10.1109/IECON.2017.8216626

Periodic speed errors can occur in permanent magnet linear synchronous machines for two reasons: 1) a periodic reference signal; 2) cogging force and friction. For reducing such periodic errors, iterative learning control or repetitive control approa... Read More about The design of a position-based repetitive control for speed ripple reduction in PMLSMs.

A fractional delay variable frequency repetitive control for torque ripple reduction in PMSMs (2017)
Journal Article
Tang, M., Gaeta, A., Formentini, A., & Zanchetta, P. (in press). A fractional delay variable frequency repetitive control for torque ripple reduction in PMSMs. IEEE Transactions on Industry Applications, https://doi.org/10.1109/TIA.2017.2725824

Based on the internal model principle, repetitive controller (RC) is capable to reduce periodic torque ripple by generating a compensating action that consequently need to be synchronized with the original ripple. However, the synchronization is diff... Read More about A fractional delay variable frequency repetitive control for torque ripple reduction in PMSMs.

A variable frequency angle-based repetitive control for torque ripple reduction in PMSMs (2016)
Conference Proceeding
Tang, M., Gaeta, A., Formentini, A., & Zanchetta, P. (2016). A variable frequency angle-based repetitive control for torque ripple reduction in PMSMs.

This paper presents a novel method for torque ripple reduction in PMSM drives at variable speed, using a combination of angle-based repetitive control and deadbeat current control. Based on the internal model principle, repetitive control is capable... Read More about A variable frequency angle-based repetitive control for torque ripple reduction in PMSMs.

Design of a repetitive controller as a feed-forward disturbance observer (2016)
Conference Proceeding
Tang, M., Formentini, A., Odhano, S., & Zanchetta, P. (2016). Design of a repetitive controller as a feed-forward disturbance observer.

From the structure point of view, a repetitive controller (RC) is considerably similar to a disturbance observer. By adding a correction term to the traditional RC and considering the disturbances as states, the repetitive controller can be designed... Read More about Design of a repetitive controller as a feed-forward disturbance observer.