用于汽车门锁的多运动模式空间柔顺开启机构及稳定性分析  

Stability Analysis and Spatial Compliant Power Release Mechanism of Vehicle Door Latch with Multi-Mode Motion

作　　者：钟传磊 杭鲁滨 王明远 曲志洋 ZHONG Chuanlei;HANG Lubin;WANG Mingyuan;QU Zhiyang(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Shanghai Collaborative Innovation Center of Intelligent Manufacturing Robot Technology for Large Components,Shanghai 201620,China)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海201620 [2]上海市大型构件智能制造机器人技术协同创新中心,上海201620

出　　处：《机械科学与技术》2023年第11期1801-1810,共10页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51475050);上海汽车工业科技发展基金项目(1617);上海市大型构件智能制造机器人技术协同创新中心开放基金项目(ZXY20211101)。

摘　　要：针对高端电动开启车门锁多工况下多支链主被动运动相容及力柔顺需求,基于变拓扑柔顺副提出了新型电动开启空间柔顺机构,该柔顺机构可实现运动空间相容、具有力顺应特征。依汽车门锁原动件、限位不同情况自动切换4种运动模式适应上解保险、开启门锁等不同工况;以含槽连杆槽内端点作为连杆特征点,研究该多模式空间柔顺机构的连杆空间轨迹、力柔顺特征、模式切换特征;根据特征点电动开启过程的相图与轨迹可视化分析,发现柔顺副扭簧刚度k_(T)是影响机构运动稳定性关键因素。提出将最大Lyapunov指数作为柔顺机构动力系统稳定性的评价指标,以带时标连杆特征点三维轨迹构造时变位移序列,用Wolf算法计算其最大Lyapunov指数,进行空间柔顺机构运动稳定性衡量,最终优选得到柔顺副刚度k_(T)值,确保了机构运动稳定性。In view of the active and passive motion characteristics and force compatibility of vehicle side door latch with power release under multi-working conditions,a new kind of spatial compliant mechanism based on the compliant joint with variable topology is proposed and constructed as the power release mechanism in vehicle latch.The spatial compliant mechanism switches automatically among four motion modes according to different drives and limit conditions.The groove endpoint of the linkage is taken as a characteristic point of the mechanism to describe the spatial motion feature,compliant feature and mode switching feature.According to the visual analysis of phase diagrams and trajectory of the characteristic point,it is found that the compliant joint stiffness k_(T) is a key parameter affecting the motion stability of the mechanism.The largest Lyapunov exponent is used as an evaluation index for the dynamic system stability of the mechanism to measure the motion stability of the spatial compliant mechanism.Based on three-dimensional trajectory of the characteristic point of groove-linkage with time scale,time-varying displacement sequence is constructed,which is used to calculate the largest Lyapunov exponent by using the Wolf algorithm.Finally,the key parameter k_(T) is obtained to ensure the stability of the mechanism.

关 键 词：汽车门锁 空间柔顺机构 运动稳定性 最大LYAPUNOV指数 Wolf法 

分 类 号：TH112[机械工程—机械设计及理论]