基于多变量设计的打纬筘座急回特性分析及优化  

ANALYSIS AND OPTIMIZATION OF QUICK-RETURN CHARACTERISTICS OF THE BEATING⁃UP SLEY BASED ON MULTIVARIABLE DESIGN

作　　者：邱海飞[1] QIU HaiFei(School of Mechanical Engineering,Xijing University,Xi′an 710123,China)

机构地区：[1]西京学院机械工程学院,西安710123

出　　处：《机械强度》2024年第5期1101-1107,共7页Journal of Mechanical Strength

基　　金：陕西省教育厅专项科研计划项目(15JK2177);西京学院高层次人才专项基金项目(XJ20B09),西京学院横向课题项目(2019610002001915)资助。

摘　　要：为改进筘座后摆急回特性,通过打纬原理分析与机构学推演,提出了一种针对牵手栓最大曲线位移S_(m)的优化数学模型。利用构件长度(l_(c)、l_(h)、l_(r)、l_(f))和曲柄转角α构建多变量设计空间,实现了短牵手四连杆打纬的参数化功能模型开发,并通过机构学仿真对其运动位姿与质心轨迹进行分析验证。实例研究结果表明,曲柄长度l_(c)和转角α对目标函数F(X)的敏感度影响更大,多变量(DV_1、DV_2、DV_3)耦合可有效增强打纬筘座急回特性的设计可塑性;当牵手栓最大曲线位移Sm增大至71.41 mm时,极位夹角θ和行程速比系数K分别被提高了10.96°和0.131,筘座急回运动效果得到明显提升。优化结果符合杆长条件和机构传动要求,有助于四连杆打纬系统的设计创新和性能改进。For improving the quick‑return characteristics of the sley movement,an optimal mathematical model for maximum curve displacement S_(m) of the connectingarm pin was proposed through beating‑up principle analysis and mechanism deduction.A multivariable design space was constructed by use of the component length(l_(c),l_(h),l_(r),l_(f))and crankangleα.The parametric functional model development of the four‑bar beating‑up with short connecting rod was realized,and its kinematic posture and centroid trajectory were analyzed and verified through mechanism simulation.The results of the case study indicate that the variable l_(c) andαhave more greater influence on the sensitivity of the objective function F(X),and multivariable(DV_1,DV_2,DV_3)coupling can effectively enhance the design plasticity of the quick‑return characteristics of the sley.When the maximum curve displacement S_(m) of the connectingarm pin increases to 71.41 mm,the extreme position angleθand the travel speed ratio coefficient K are increased by 10.96°and 0.131 respectively,and the quick-return motion effect of the sley is obviously improved.The optimization results accord with the conditions of rod length and mechanism transmission requirement,which are conductive to the design innovation and performance improvement of the four‑bar beating‑up system.

关 键 词：四连杆打纬 急回特性 连杆 传动角 优化 位姿 敏感度 

分 类 号：TH122[机械工程—机械设计及理论] TS103[轻工技术与工程—纺织工程]