变导程螺旋引纬机构剑杆位移曲线的设计  

Design of displacement diagram for rapier in variable lead screw weft insertion mechanism

作　　者：张雷[1] 孔佳元 雷炳杰 李杨[1] ZHANG Lei KONG Jiayuan LEI Bingjie LI Yang(College of Mechanical Engineering ＆ Automation, Zhefiang Sci-Tech University, Hangzhou, Zhejiang 310018, China)

机构地区：[1]浙江理工大学机械与自动控制学院,浙江杭州310018

出　　处：《纺织学报》2017年第4期121-126,共6页Journal of Textile Research

基　　金：国家自然科学基金项目(51175475);浙江省自然科学基金项目(LY14E050027)

摘　　要：为提高变导程螺旋引纬机构的运动特性,基于一种变异梯形加速度运动规律设计出引纬机构运动曲线。根据实际引纬工况和加速度曲线各分界点的边界条件构建方程组,依据经验值确定方程组中变量的合理范围,然后通过编写的Mat Lab算法对方程组进行计算求解,通过综合考虑加速度峰值、速度峰值和纬纱交接区域的临界点速度从解空间中找出最优的目标解。随后将基于经典梯形加速度曲线设计的运动规律与前面得到的最优运动规律进行对比。研究结果表明:设计的最优运动规律在纬纱交接区域的速度和加速度比采用经典梯形加速度曲线设计的数据要显著降低,使得剑杆在纬纱交接区域运行更加平稳。In order to improve the motion characteristics of the variable lead screw weft insertion mechanism,the displacement curve of weft insertion mechanism was designed based on the transformed trapezoidal acceleration curve.Firstly,an equation set was built according to the actual working conditions of weft insertion and the boundary conditions of the cut-off points in the acceleration curve.Parts of the variables were determined based on the empirical data and the variables were limited in a reasonable range.Then the equation set could be solved by Mat Lab.The optimal objective solution was selected from the solution space under comprehensive consideration of the peak acceleration,the peak velocity and the velocity of the critical point in the weft transition area.Subsequently,a comparison between the designed optimal motion law with the one based on the classic trapezoidal acceleration curve was carried out.The result shows that when the rapier moves into the weft transition area,the velocity and the acceleration of the designed optimal motion law are significantly smaller than the ones based on the classic trapezoidal acceleration curve,so that the rapier operates more stably when in the weft transition area.

关 键 词：引纬机构 梯形加速度曲线 最优目标解 剑杆 位移曲线 

分 类 号：TS103.1[轻工技术与工程—纺织工程]