System Modeling and Simulation for Cylinder Controlled by Servo Valve of Hydraulic Looper in Hot Strip Mills

doi:10.16182/j.issn1004731x.joss.201704018

Abstract

Abstract: Starting from the flow characteristics of cylinder controlled by servo valve of hydraulic looper in hot strip mills, a new mathematic model for hydraulic cylinder controlled by servo valve was established by analyzing and deducing the flow characteristics of two chambers of hydraulic cylinder. The model is different from the traditional equivalent model of “load-pressure flux”, and it is adaptable to many structural forms such as symmetric cylinder, asymmetric cylinder and piston cylinder. The simplified equivalent model was deduced by the simplified method of automatic control principles. The simulation experiments were carried out on a practical cylinder controlled by servo valve of hydraulic looper of a hot strip finishing mill. The results show the simulation values are close to the measured values in production field, and verify the effectiveness and accuracy of the proposed model, which provides reliable basis for the analysis of the stability and the dynamic characteristics of the similar system.

Key words: hydraulic looper, hydraulic cylinder controlled by servo valve, mathematic model, simulation

CLC Number:

TP139.9

Tao Guilin, Li Weigang. System Modeling and Simulation for Cylinder Controlled by Servo Valve of Hydraulic Looper in Hot Strip Mills[J]. Journal of System Simulation, 2017, 29(4): 840-846.

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