摘要
现有曲柄滑块机构型汽车板簧疲劳试验机,需停机改变杆长来调整试验幅值。研究二自由度平面七杆机构,意图改变两曲柄的初始相位差来实现幅值的在线调整。通过建立机构运动学分析模型,借助Matlab/Simulink软件及Newton-Raphson法进行数值仿真,验证了机构幅值动态调整的可行性;当改变初始相位差时,板簧试验振幅随之得到调整。且采用混合驱动的方式可方便地控制相位,使机构保留了机械式疲劳机的高效可靠,并具有一定柔性。
The existing leaf spring fatigue tester which works on the principle of slider--crank mechanism adjusts amplitude by changing the rod length, and it has to stop working for adjustment under current structure. The planar seven--bar mechanism with 2--DOF is studied that attempts to dynamically adjust amplitude by changing the initial phase difference. The workability of the dynamic adjustment of the amplitude is testified through establishing the analytic model of the kinematics, simulating the model with resort to Matlab/Simulink software and Newton--Raphson method. When the initial phase difference is changed, the leaf spring test amplitude is accordingly adjusted. Besides, the hybrid drive fatigue tester could freely control the phase with a lot of flexibility which meanwhile maintains the efficiency and reliability of the mechanic one.
出处
《机械传动》
CSCD
北大核心
2014年第7期27-30,40,共5页
Journal of Mechanical Transmission
基金
江西省科学技术厅"科技支撑计划"项目(2011ZBBE50028)
