摘要
为了研究发动机连杆在拉压载荷下的疲劳特性,基于美国NI公司的LabVIEW开发环境和CompactRIO嵌入式控制器,研制了发动机连杆拉压模拟疲劳试验台,该试验台采用了液压伺服的加载方式对连杆进行了拉压加载。根据发动机实际运行工况下连杆主要承受着循环交变拉压载荷,而最大压缩载荷要大于最大拉伸载荷的特点,采用了非对称的加载方式进行加载,并对载荷进行了PID控制。最后以某型号连杆为例,在LabVIEW中对加载载荷的计算、非对称加载的实现和载荷的PID控制进行了仿真。仿真结果表明:该试验台试验功能可以实现,试验性能良好。
In order to research the fatigue properties of the connecting rod with tension and compression loads,the test rig was studied based on LabVIEW development environment and CompactRIO embedded controller,and the hydraulic servo loading system was adopted.In engine actual conditions,the connecting rod mainly bears circular alternating tensile and compressed load,and the maximum compressed load is larger than the maximum tensile load,so the asymmetrical loading method and the PID control on the loads were adopted.At last,a certain type of connecting rod for example was taken,the loads calculation,the asymmetrical loading method and the PID control were simulated in the LabVIEW.The results show that the test rig of which the function can be realized has a good performance.
出处
《机电工程》
CAS
2011年第6期653-658,662,共7页
Journal of Mechanical & Electrical Engineering
