英语翻译Weaving machines are classified into four groups according to their weft inser¬tion systems; shuttle,projectile,rapier and jet (i.e.air and water jet) looms.Of these groups,the shuttle and projectile weft insertion systems have reache

英语翻译Weaving machines are classified into four groups according to their weft inser¬tion systems; shuttle,projectile,rapier and jet (i.e.air and water jet) looms.Of these groups,the shuttle and projectile weft insertion systems have reache
英语翻译
Weaving machines are classified into four groups according to their weft inser¬tion systems; shuttle,projectile,rapier and jet (i.e.air and water jet) looms.Of these groups,the shuttle and projectile weft insertion systems have reached the term of their economic life,because of their low weaving velocity.The water jet weft insertion system does not have a wide application in practice,as it is only suitable for yarns made of hydrophobic fibres.Rapier and air jet weft insertion systems are commonly used for almost all kinds of fibres and yarns.When air jet and rapier weft insertion systems are compared,it is apparent that the rapier system has a lower velocity than air jet systems.The air jet weaving system is commonly preferred due to its high pro¬duction speed.
In air jet weaving,the weft yarn is moved by the friction created by the high speed air flow.The forces which are required to move and accelerate the weft yarn are produced by the air jet.These forces have to be higher than the combination of the force of the inertia and the resistance forces of the yarn bobbin and the reserve system.The carrier and the resistive force characteristics are defined by the consider¬ation of weft yarn properties and physical properties of the air flow [1,2,9,15].Air velocity and yarn structures have complex interrelations due to their properties,such as turbulent and laminar air flow,constant yarn diameter,linear density (count) and elasticity.Air flow is important to increase weft velocity and productivity,and so it must always be controlled,due to the change in the yarn count and the coefficient of twist.When the coefficient of twist increases,the weft velocity de¬creases.Also,when the yarn count (tex) increases,the average velocity increases [3,4].Weft yarn velocity for the Toyoda-type weaving machine has been studied by Hasegawa et al.[12].This velocity achieves a certain average value along the weft insertion.It reaches constant speed at a certain time tp which is such a func¬tion of the weft diameter,that due to the diameter increase tp also increases [16].According to Uno,et al.[19] the insertion force at a constant diameter weft increases due to the increase in air velocity.With the decrease in weft diameter,the insertion force also decreases.For this reason,it was observed that the velocity of the weft yarn has a smaller value.
In this study,the effects of the coefficients of twist and yarn count on the weft yarn velocity along the tube at constant air-pres¬sure are investigated using fuzzy logic.

英语翻译Weaving machines are classified into four groups according to their weft inser¬tion systems; shuttle,projectile,rapier and jet (i.e.air and water jet) looms.Of these groups,the shuttle and projectile weft insertion systems have reache
织机分为四组,根据各自的纬纱插入¬化系统;接送,弹丸,剑杆织机和喷气（即空气和水射流）织机.这些团体,航天飞机和弹丸引纬系统已经达到了长期的经济生活中,由于其低织布速度.水射流引纬系统并没有广泛的应用在实践中,因为它仅适用于纱线制成的疏水性纤维.剑杆织机和喷气引纬系统的普遍使用的几乎所有种类的纤维和纱线.当喷气和剑杆织机引纬系统进行了比较,很明显,在剑杆系统具有较低的速度比空气喷射系统.喷气织机的系统通常是首选,因为它的高亲¬生产速度.
在喷气织机的纬纱是感动的摩擦所产生的高速气流.该部队必须移动和加速纬纱是由喷气.这些部队将高于相结合的力量的惯性和抵抗力量的纱筒管和储备制度.承运人和电阻力特点界定的考虑¬化的纬纱性质和物理性质的空气流动[ 1,2,9,15 ] .空气流速和纱线结构的复杂的相互由于其性质,如湍流和空气层流,不断纱线直径,线密度（计数）和弹性.气流重要的是要增加纬纱速度和生产力,所以必须始终得到控制,由于改变纱线数量和捻系数.当捻系数的增加,纬速度日¬折痕.此外,当纱线计数（纺织品）的增加,平均速度增加[ 3,4 ] .纬纱速度为丰田型织机研究了长谷川等.[ 12 ] .这速度达到一定的平均价值沿引纬.到达恒速在某一时间茶多酚是这样一个函数¬化的纬纱直径,由于直径增加总磷也增加[ 16 ] .据宇,等.[ 19 ]的插入力在不断增加纬纱直径由于增加了空气流速.随着减少纬纱直径,插入力也下降.出于这个原因,有人指出,速度纬纱有一个较小的值.
在这项研究中,影响系数的捻度和纱线指望纬纱速度沿管固定空气压力¬确保调查采用模糊逻辑.