Calculation Method of MDF Continuous Press Quality Control Based on Burgers Model

WANG Chunxiao; LIU Yaqiu; WU Qu

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Calculation Method of MDF Continuous Press Quality Control Based on Burgers Model

WANG Chunxiao #,LIU Yaqiu *,WU Qu

College of Information and Computer Engineering, Northeast Forestry University, Harbin 150040

*Correspondence author

#Submitted by

Subject:

Funding: Specialized Research Fund for the Doctoral Program of Higher Education （No.No. 20120062110012）

Opened online:15 May 2014

Accepted by: none

Citation: WANG Chunxiao,LIU Yaqiu,WU Qu.Calculation Method of MDF Continuous Press Quality Control Based on Burgers Model[OL]. [15 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4596580

In this paper, to solve the problems such as bubbling and stratification on medium density fiberboard (MDF) in the processing and application, a quality control process based on MDF viscoelastic is proposed. Firstly, the creep compliance equation was deduced by studying the constitutive equation and the creep equation of viscoelastic Burgers model. Secondly, a tension and compression stiffness-creep compliance model based on the principle of dimensional homogeneous was built. And then after analyzing the servo-mechanisms and hydraulic loading system respectively, a model of the hydraulic position servo control system with pressure feedback was proposed by introducing the factors of pull-pressing rigidity and hydraulic rigidity. Finally, the slab hot-pressing control system with viscoelastic properties is simulated on the basis of the model of the hydraulic position servo control system with pressure feedback. The simulation results indicate that the precision of controlled object can be improved and the adverse effects brought by viscoelastic properties can be restrained through reasonable design of controller effectively.

Keywords:MDF; Burgers model; Viscoelastic load; Tension and compression stiffness; Servo control

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