Intelligent control system for short fiber reinforced fiberboard hot press forming process

CN121973306A8Pending Publication Date: 2026-06-12PUYANG SENDA WOOD IND CO LTD
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Patent Information

Application Number
CN202610187649.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-10
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

In the existing hot pressing process of short fiber reinforced fiberboard, it is difficult to accurately identify and compensate for the pressure disturbance caused by the evolution of the internal microstructure of the board in real time. This leads to internal stress defects in the board, such as microcracks, stress concentration areas, delamination and cracking, and warping deformation.

Method used

An intelligent control system is adopted to collect multi-dimensional physical property parameters of slab, suppress environmental noise, capture stress wave pulses and project them into the time-frequency synergistic domain, extract fiber damage variables, map them into structural disturbance parameters, perform coupling analysis with pressure change information, generate synchronous out-of-phase compensation components, and inject transient drive correction commands into the pressure control loop to execute nonlinear stress relaxation pressure reduction control.

Benefits of technology

It achieves precise extraction of micro-evolution characteristics and deep decoupling of macro- and micro-perturbation components during the hot pressing process of short fiber slabs, suppresses stress concentration inside the slabs, reduces the risk of delamination, cracking, and warping in finished products, and improves comprehensive mechanical properties.

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Abstract

The application discloses a kind of short fiber reinforced fiberboard hot-press forming process intelligent control system, it is related to intelligent control technical field, including: under the constraint of initial forming reference parameter, stress wave pulse is captured by monitoring window that is dynamically opened and closed with pressure load, and acoustic emission signal is projected to time-frequency collaborative domain, and fiber damage variable is extracted by the intensity of energy distribution stripping;Disturbance module, fiber damage variable is mapped as the structure disturbance parameter of short fiber reinforced plate blank internal structure evolution state, and coupling analysis is carried out with the pressure change information detected in forming process, and structure disturbance estimation parameter is formed;Adjusting module, structure disturbance estimation parameter is mapped as synchronous out-of-phase compensation component, and transient driving correction instruction that is offset with disturbance energy is injected in pressure control loop, and output forming state data stream;Reduce finished product delamination burst and warping risk and improve short fiber reinforced fiberboard comprehensive mechanical property.
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