The Analysis Of Rapier Towel Loom Warp Tension Model And The Research Of Tension Control Method

The warp tension is the most important factor which affects the quality of fabric. Duringhigh modules fiber’s weaving process, unstable warp tension leads to fabric crimpphenomenon. So the warp tension control is one of the key technologies of loom controlsystem.In this paper, the domestic and international research in related fields of tension control issummarized around the theory and method of tension control at first. On the basis of analyzingchange law and the development history about control method of tension control, the mainresearch content and the corresponding technical route are presented.Next, according to the working principle and technological characteristics of towel rapierloom, this paper proposes a design method of towel rapier loom control system based onindustrial Ethernet. The control system use32-bit microprocessor as the core, throughintegrating the industrial Ethernet module has high flux data communication ability, and onthe basis it develop of a software framework based on the finite state machine to meet thetowel weaving process of complex process requirement. The control system can meet thecontrol requirements of ordinary loom, and make the loom run stable. The stable operation ofthe system supply guarantees to experiment.Once more, through analyzing the forming principle of process, it obtain that the warplongitude deformation caused by mechanism’s movement is the significant reason due totension change. On the basis of analyzing the warp deformation mechanics and the dynamicalmodel of warp beam driven by a servo motor, the rotation speed of warp beam is adjusted by afeed forward method where the warp longitude deformation induced by the take-up andshedding mechanism’s movement is regarded as distributed input.At lost, the controller is applied to the control of rapier loom and the experiments areconducted on a glass fiber rapier loom. Comparisons between simulation results andexperimental data show that the proposed control strategy can effectively compensate thedeformation of glass fibre caused by shedding mechanism’s movement under different mainshaft rotation speed. Consequently the variation of warp tension can be suppressed. The control algorithm has some advantage such as easy to use and for control parameterdetermination. The study is critical to improve the performance of industrial fabric whichusually is constructed by high modules fiber.