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Variable universe fuzzy PID extrusion type 3D printer slurry extrusion control method and device

A 3D printer and control device technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve problems such as unstable extrusion pressure, achieve rapid extrusion pressure stability, improve printing and forming accuracy, and improve The effect of robust performance

Pending Publication Date: 2022-02-01
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problem existing in the prior art is that the extrusion pressure of the multi-material extrusion 3D printer is not stable, and the slurry cannot be extruded at a stable extrusion speed.

Method used

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  • Variable universe fuzzy PID extrusion type 3D printer slurry extrusion control method and device
  • Variable universe fuzzy PID extrusion type 3D printer slurry extrusion control method and device
  • Variable universe fuzzy PID extrusion type 3D printer slurry extrusion control method and device

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Embodiment Construction

[0033] Such as figure 1 As shown, a variable universe fuzzy PID extrusion type 3D printer slurry extrusion control device is characterized in that it includes a base 2, a stepping motor push rod 4 coaxially arranged in the base, and a syringe 1. A load cell 3 is arranged between the stepping electric push rod and the injector, a control cabinet 5 is installed on the right side of the base, and a control unit is arranged in the control cabinet, and the control unit is respectively connected with the stepping motor pusher. The rod and the load cell are connected, the stepping electric push rod, the load cell and the syringe are from top to bottom and the three are coaxial to ensure that the stepping electric push rod will not be disturbed by other directions during the extrusion process.

[0034] Such as figure 2 As shown, the control unit includes a sequentially connected STM32 control module, an output module, a pressure detection module, a stepper motor drive module, an A / D...

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Abstract

The invention relates to a variable universe fuzzy PID extrusion type 3D printer slurry extrusion control method and device. The method comprises the following steps of: designing a telescopic factor for determining and adjusting the sizes of an input variable discourse domain and an output variable discourse domain, designing a membership function and a fuzzy rule of a fuzzy controller, and finishing fuzzy reasoning and defuzzification; and establishing a complete extrusion device extrusion force control method through using a fuzzy controller designed by combining a quantization factor, a scaling factor and the corresponding telescopic factor. According to the variable universe fuzzy PID extrusion type 3D printer slurry extrusion control method, an accurate mathematical model is difficult to establish when a high-solid-phase material is extruded, and a pressure control system is often a time-varying and nonlinear system. In order to overcome the defects in the prior art, the variable universe fuzzy PID control method of an extrusion device of an extrusion type 3D printer is designed, the robust performance of an extrusion force system of the extrusion device is improved, the stability of the system is further enhanced, the adjusting capacity of the extrusion force and the extrusion speed in the slurry extrusion process is improved, and the forming precision of the extrusion type 3D printer is improved.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing rapid extrusion molding manufacturing, and relates to a method for controlling the extrusion force of a material extrusion type 3D printer slurry extrusion device, in particular to a variable universe fuzzy PID extrusion type 3D printer slurry Extrusion control method and device. Background technique [0002] Additive manufacturing is a manufacturing technology that realizes the integration of structure and function. Common 3D printing manufacturing technologies include fused deposition, photocuring, laser sintering, and material extrusion. Among them, the material extrusion process is suitable for the extrusion printing of ceramic materials with high solid phase content. The printed ceramic slurry or paste is extruded and tightly filled in the barrel, and the external load is used to force the slurry to compress from the tiny flow channel. extrude. Non-homogeneous ceramic slurry ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 周婧高红飞李海利卢林段国林
Owner TIANJIN UNIV OF SCI & TECH
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