Blanking-bending process chain with disturbance feed-forward and closed-loop control

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• 作者：Peter Groche ^{groche@ptu.tu-darmstadt.de" class="auth_mail" title="E-mail the corresponding author} ; Florian Hoppe ; ^{hoppe@ptu.tu-darmstadt.de" class="auth_mail" title="E-mail the corresponding author} ; Daniel Hesse ^{hesse@ptu.tu-darmstadt.de" class="auth_mail" title="E-mail the corresponding author} ; Stefan Calmano ^{calmano@ptu.tu-darmstadt.de" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Product properties ; Sheet metal ; Uncertainty ; Process chain ; Feed-forward ; Closed-loop
• 刊名：Journal of Manufacturing Processes
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：24
• 期：part_P1
• 页码：62-70
• 全文大小：1993 K

文摘

Bending and other manufacturing processes are subject to uncertain process conditions like varying properties of the semi-finished parts. In order to obtain precise bending angles, these variations have to be compensated. Upstream processes often deliver valuable information about the actual part properties. This paper presents a blanking-bending process chain in which information from the blanking process is passed on to the bending process. A feed-forward bending controller uses this information as input state and compensates deviations from the nominal state. In a second instance, a closed-loop controller addresses model uncertainty of the feed-forward controller as well as unknown disturbances. A model-based closed-loop control design is shown which increases stability, stationary accuracy and time-optimality.