Research On Control System Of Shedding、Wefting Insertion And Traction For Tubular3D Fabric Weaving Equipment

The task of this thesis is to research on the control strategy and system of shedding, weft insertion and traction mechanism aiming at circular loom weaving3D tubular fabric developed by Donghua University, specifically, the task contains control program design, hardware system design and human-computer interface design.For the purpose of improving programming efficiency and the generality of control program, a new approach named perssad phase generation approach for the representation of tubular3D woven fabric’s structure was presented in this paper in consideration of the particularity of3D tubular fabric woven by3D circular weaving method. And on basis of this approach an automatically generation system for3D tubular fabric weaving data is developed by MATLAB/GUI. In addition, the control system consists of software system, hardware system and human-computer interface for the3D tubular fabric is also designed.The perssad phase generation approach provided convenience for the design of shedding and weft insertion module control program, and3D tubular fabric weaving data can be got fastly and accurately using the automatically generation system based on the approach.Control algorithm for weaving non-equal diameter tubular fabric with constant weft density is presented, in which the RBF (Radial Basis Function, RBF) neural network was used to approximate the shape function of tubular fabric, and then dispersed the function to obtain the law curve of cam rotation angle and the changing of pulling speed under the condition of keeping the weft density constant. A case has been studied to prove that this control algorithm has a fast convergence rate and good effect, it provides theoretical basis for the diameter changing control.The control system for mechanism of shedding, weft insertion and traction realized automatically control for the3D tubular fabric weaving equipment successfully.