This paper presents a comparison study of two models for predicting the strength of rotor spun cotton yarns from fiber properties. The adaptive neuro-fuzzy system inference （ANFIS） and Multiple Linear Regression mod...This paper presents a comparison study of two models for predicting the strength of rotor spun cotton yarns from fiber properties. The adaptive neuro-fuzzy system inference （ANFIS） and Multiple Linear Regression models are used to predict the rotor spun yarn strength. Fiber properties and yam count are used as inputs to train the two models and the count-strength-product （CSP） was the targel. The predictive performances of the two models are estimated and compared. We found that the ANFIS has a better predictive power in comparison with linear multiple regression model. The impact of each fiber property is also illustrated.展开更多
This paper deals with the tensile behaviour of rotor spun yarns. Having regard to the spe-cial construction of rotor spun yarn, some modifications for Hearle’s theory have been made inorder to apply Hearle’ s theory...This paper deals with the tensile behaviour of rotor spun yarns. Having regard to the spe-cial construction of rotor spun yarn, some modifications for Hearle’s theory have been made inorder to apply Hearle’ s theory to rotor spun yarn. The paper then goes into calculating thetensile curve and investigating the effect of main parameters and spinning conditions on thetensile behaviour of rotor spun yarn. It was found that the following facts are noteworthy forimproving the mechanical properties of rotor spun yarn: (1) Selecting suitable navel so as tocontrol the P. T. E. length within a reasonable range. (2) Improving the design of single fibresupply device to decrease the amount of spoiled fibre and hence increase the effective fibrelength. (3) Increasing spinning yarn tension without yarn break to enhance the fibre migrationratio. (4) For the rotor spun yarn of industrial use, it is the way to increase the yarn strengththat the rotor groove should be designed with the groove angle beneficial to decrease the yarnspecific volume.展开更多
转杯纺成纱器在牛仔面料生产中应用广泛,转杯及其凝聚槽类型是影响成纱特性的重要参数。探究不同直径的T型凝聚槽对转杯内气流场的影响,借助ANSYS有限元软件分析纺纱通道内气流场数值,并进行纺纱实验验证,优化成纱质量,提供面料服用性...转杯纺成纱器在牛仔面料生产中应用广泛,转杯及其凝聚槽类型是影响成纱特性的重要参数。探究不同直径的T型凝聚槽对转杯内气流场的影响,借助ANSYS有限元软件分析纺纱通道内气流场数值,并进行纺纱实验验证,优化成纱质量,提供面料服用性能。研究结果表明:在相同工艺条件下,凝聚槽一周(0°~360°)范围内,气流速度为T_(36)型>T_(42)型>T_(46)型;在20°~340°范围内,气流压力为T_(46)型>T_(42)型>T_(36)型,即负压绝对值T_(36)型>T_(42)型>T_(46)型,但在0°(即360°)位置处,由于纤维输送通道气压的冲击作用,使转杯内气流压力为T_(36)型>T_(46)型>T_(42)型。3种直径的T型槽内气流静压和速度趋势基本一致,以直径42 mm的T型槽为例,转杯内的静压大部分为负压,位于-4.1^-10.8 k Pa之间;气流在纤维输送通道中加速运动,出口处的气流速度达到241 m/s;3种不同直径T型转杯所纺纱线强力为T_(36)型>T_(42)型>T_(46)型,断裂伸长率为T_(36)型>T_(42)型>T_(46)型,条干不匀率为T_(46)型>T_(42)型>T_(36)型,毛羽值为T_(46)型>T_(42)型>T_(36)型。展开更多
文摘This paper presents a comparison study of two models for predicting the strength of rotor spun cotton yarns from fiber properties. The adaptive neuro-fuzzy system inference （ANFIS） and Multiple Linear Regression models are used to predict the rotor spun yarn strength. Fiber properties and yam count are used as inputs to train the two models and the count-strength-product （CSP） was the targel. The predictive performances of the two models are estimated and compared. We found that the ANFIS has a better predictive power in comparison with linear multiple regression model. The impact of each fiber property is also illustrated.
文摘This paper deals with the tensile behaviour of rotor spun yarns. Having regard to the spe-cial construction of rotor spun yarn, some modifications for Hearle’s theory have been made inorder to apply Hearle’ s theory to rotor spun yarn. The paper then goes into calculating thetensile curve and investigating the effect of main parameters and spinning conditions on thetensile behaviour of rotor spun yarn. It was found that the following facts are noteworthy forimproving the mechanical properties of rotor spun yarn: (1) Selecting suitable navel so as tocontrol the P. T. E. length within a reasonable range. (2) Improving the design of single fibresupply device to decrease the amount of spoiled fibre and hence increase the effective fibrelength. (3) Increasing spinning yarn tension without yarn break to enhance the fibre migrationratio. (4) For the rotor spun yarn of industrial use, it is the way to increase the yarn strengththat the rotor groove should be designed with the groove angle beneficial to decrease the yarnspecific volume.
文摘转杯纺成纱器在牛仔面料生产中应用广泛,转杯及其凝聚槽类型是影响成纱特性的重要参数。探究不同直径的T型凝聚槽对转杯内气流场的影响,借助ANSYS有限元软件分析纺纱通道内气流场数值,并进行纺纱实验验证,优化成纱质量,提供面料服用性能。研究结果表明:在相同工艺条件下,凝聚槽一周(0°~360°)范围内,气流速度为T_(36)型>T_(42)型>T_(46)型;在20°~340°范围内,气流压力为T_(46)型>T_(42)型>T_(36)型,即负压绝对值T_(36)型>T_(42)型>T_(46)型,但在0°(即360°)位置处,由于纤维输送通道气压的冲击作用,使转杯内气流压力为T_(36)型>T_(46)型>T_(42)型。3种直径的T型槽内气流静压和速度趋势基本一致,以直径42 mm的T型槽为例,转杯内的静压大部分为负压,位于-4.1^-10.8 k Pa之间;气流在纤维输送通道中加速运动,出口处的气流速度达到241 m/s;3种不同直径T型转杯所纺纱线强力为T_(36)型>T_(42)型>T_(46)型,断裂伸长率为T_(36)型>T_(42)型>T_(46)型,条干不匀率为T_(46)型>T_(42)型>T_(36)型,毛羽值为T_(46)型>T_(42)型>T_(36)型。
