Instability Condition Derivation for Hydraulic AGC System under Pressure Closed-Loop Control

In strip rolling, hydraulic automatic gauge control (HAGC) system is the key element to guarantee the precision of strip gauge. The stability of the kernel pressure closed loop (PCL) in the HAGC system plays an essential role in guaranteeing the rolling process with high performance. Nevertheless, t...

Full description

Saved in:
Bibliographic Details
Published in:Shock and vibration 2021, Vol.2021 (1)
Main Authors: Zhu, Yong, Li, Guangpeng, Tang, Shengnan, Jiang, Wanlu, Qian, Pengfei, Zheng, Zhi, Zheng, Zhijian
Format: Article
Language:English
Subjects:
Analysis
Automatic control
Block diagrams
Closed loop systems
Closed loops
Control stability
Control systems
Hydraulics
Information transfer
Mathematical models
Nonlinear control
Strip
Systems stability
Vibration
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In strip rolling, hydraulic automatic gauge control (HAGC) system is the key element to guarantee the precision of strip gauge. The stability of the kernel pressure closed loop (PCL) in the HAGC system plays an essential role in guaranteeing the rolling process with high performance. Nevertheless, there is some difficulty in exploring the instability mechanism of the HAGC system due to the fact that the PCL is a representative nonlinear closed-loop control system. In this work, for each component of the HAGC system, the mathematical model was established. And on the basis of the linking relation of various elements, we derived the incremental transfer model of the PCL system. Furthermore, in accordance with the deduced information transfer relation, the transfer block diagram of disturbing variable of the PCL system was obtained. Moreover, for the purpose of deriving the instability condition of the PCL system, the Popov frequency criterion was employed. The instability conditions of the HAGC system were obtained under PCL control. Furthermore, the derived instability conditions of the HAGC system were experimentally verified under various working conditions. The research results provide a fundamental foundation for studying the instability mechanism of the HAGC system.
ISSN:1070-9622
1875-9203
DOI:10.1155/2021/6618525