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H-Infinity Speed Controller Design for Vibratory Drive Trains with Low Mass Ratio

: Bendrat, F.; Sourkounis, C.


Institute of Electrical and Electronics Engineers -IEEE-; IEEE Industrial Electronics Society -IES-:
46th Annual Conference of the IEEE Industrial Electronics Society, IECON 2020. Proceedings : Online, Singapore, 19 - 21 October 2020
Piscataway, NJ: IEEE, 2020
ISBN: 978-1-7281-5415-2
ISBN: 978-1-7281-5414-5
ISBN: 978-1-7281-5413-8
IEEE Industrial Electronics Society (IECON Annual Conference) <46, 2020, Online>
Fraunhofer IWES ()

Variable frequency drives in industrial speed-controlled applications with high reduction gear ratios - which are often used in case the driven process demands for high torques - are prone to extensive and lightly damped mechanical oscillations. This is due to the low process-side inertia and notable gear play, which both encourage excitation of the lowest mechanical resonance frequency. Moreover, it is well known, that a significant active damping contribution is hardly realizable through tuning of a classical PI speed controller. Due to multifaceted requirements with respect to control objectives and mandatory robustness properties, ℋ ∞ theory appears to be a promising instrument for the design of an advanced speed controller for such systems. Therefore, this paper presents a ℋ ∞ theory-based speed control design methodology. A drive system example with very low load-side inertia is chosen in order to demonstrate the effectiveness of the presented control approach.