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圧延プロセスの軸振動の解析とその抑制制御

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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol.19 (1987) No.1

圧延プロセスの軸振動の解析とその抑制制御

Analysis and Control System of Shaft Vibrations in Steel Rolling Processes

土 井 克 彦(Katsuhiko Doi) 石 川 好 蔵 (Kozo Ishikawa) 佃 一 二 三 (Hifumi Tsukuda) 山本 和明(Kazuaki Yamamoto) 菅沼 七三雄(Namio Suganuma) 内藤 粛(Tadashi Naito) 要旨 : 近年,圧延プロセスを連続化し,同期化し,また製品を高品質化するため設備の利府ラッシ ュを行ってきたが,ドライブ系が高応答・高精度を要求される冷間,熱間圧延連続ミルと連 続焼鈍プロセスラインで,機械系と制御系が相互に影響し合った軸振動問題が発生した。そ こでドライブ系に対する種々の要求(高精度,高応答,高効率,高信頼性など)の解決にイ ンパクトを与えたパワーエレクトロニクス技術のうち,前面ディジタルサイリスタードラ イブと交流循環電流サイクロコンバータードライブの軸振動への影響をシミュレーション 解析と実機検証を通じて把握した。制御系では速度フィードバックフィルターリング,速度 制御の高速化,高精度演算化および新制御理論の適用が,機械と制御の連成軸振動抑制に有 効であることが,判明した。 Synopsis :

In recent years, the authors have been endeavoring to revamp steel rolling processes by realizing continuous and synchronized production between two processes in order to achieve higher quality of products. In cold and hot tandem mills or continuous annealing process lines, which required high response and high accuracy to the motor control system, the authors encountered troubles with shaft vibrations caused by interaction between mechanical and electrical control systems, and developed a new power drive technique which was effective in solving the problems. And authors were able to understand the influence of all the digital thyrister motor drive system and the cross current type cycloconverter drive system on the shaft vibration problem through computer simulation analyses and experiments. As a result, the following were found effective in supressing shaft vibrations: (1) To apply a digital filtering method to speed feedback, (2) to control a speed control loop in high speed sampling time and high accuracy calculation, and (3) to apply the modern control theory.

(c)JFE Steel Corporation, 2003

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