(智常建,哈工大学报,2014)运动副间隙对多杆锁机构动力学特性的影响_智常建.pdfVIP

第46 卷 第8 期 哈 尔 滨 工 业 大 学 学 报 Vol. 46 No. 8 2 0 1 4 年8 月 JOUＲNAL OF HAＲBIN INSTITUTE OF TECHNOLOGY Aug． 20 14 运动副间隙对多杆锁机构动力学特性的影响 智常建，王三民，孙远涛 (西北工业大学机电学院，7 10072 西安) 摘 要:为降低因受力异常而出现飞机货舱门意外打开的概率，详细研究运动副间隙对多杆锁机构动力学特性的影响． 采用无质量的等效间隙杆描述运动副的间隙，以拉格朗日动力学方程和螺旋理论为基础建立了多杆锁机构的动力学分 析模型，并用MATLAB 软件编程对模型进行了求解分析． 结果表明: 杆的角速度、角加速度、驱动力矩和铰链约束力对运 动副间隙的大小比较敏感，在奇异位型附近受到的影响最大． 间隙为10 μm 时，其对多杆锁机构的动力学影响较小;间隙 为100 μm 时，其对多杆锁机构的动力学影响明显增强． 关键词:运动副间隙;多杆锁机构;螺旋理论;等效间隙杆;动力学特性 中图分类号:TH122 文献标志码:A 文章编号:0367 － 6234 (2014)08 － 0102 － 05 Effect of kinematic pairs clearance on dynamic characteristics of multi-linkage lock mechanisms ZHI Changjian ，WANG Sanmin ，SUN Yuantao (School of Mechanical Engineering ，Northwestern Polytechnical University ，7 10072 Xian ，China) Abstract :To reduce the probability of aircraft cargo door opened accidently caused by abnormal stress ，the dynamic characteristics of multi-linkage lock mechanisms with kinematic pairs clearance are studied in detail． The equivalent joint clearance link (the length is e)is used to describe the influence of kinematic pairs clearance． Meanwhile ，the dynamic analysis model of multi-linkage lock mechanisms is built based on the Lagrange kinetic equation and the screw theory ，and the procedures programmed by MATLAB are used to solve and analysis the model． Ｒesults indicate that the kinematic pairs clearance has a bigger influence on angular velocity of the rod ，angular acceleration of the rod ，driving moment and hinge binding kinematic ，and the greatest influence appears near the singular configuration． While e is 10 μm ，its impact on dynamics of the multi-linkage lock mechanisms is small ，however while e