The Use of Frequency Characteristics for Interconnected Drive of Rolling Mill Modes Research

When modeling complex interrelated facilities, the MATLAB environment may not always be useful for determination of frequency response characteristics. This fact may be explained by properties of facilities, which can change their parameters at variable operation conditions. The authors propose a model of rating frequency response characteristics for the above facilities to determine an amplitude response as relation of amplitudes of input and output sine waveforms and a phase delay between an input and output signal (phase curve) at different values of input frequencies. The proposed method was used for evaluation of frequency response characteristics of interrelated electric drives of the continuous rolling mill, where strip properties in the inter stand gap depend on the rolling speed. The investigation outcome may be used at designing tension regulators for continuous rolling mills. (C) 2017 The Authors. Published by Elsevier Ltd.