To obtain accurate fatigue life results for construction machinery components,acquiring load spectra is crucial,as their authenticity and validity directly determine the precision of the analysis.In working conditions...To obtain accurate fatigue life results for construction machinery components,acquiring load spectra is crucial,as their authenticity and validity directly determine the precision of the analysis.In working conditions,component attitudes change continuously,but they remain static on the vibration test rig(VTR),so the acquired target signals should match with the actual component attitudes in the driving signal generation.This paper proposes an efficient and economical simulation-based virtual VTR for fatigue analysis of dozers.First,the relationship between the push arm rotation angle and the cylinder stroke is established,since the cylinder strokes can be measured easily in data acquisition experiments.Second,load decomposition is used to determine the attitude relationship between virtual VTR conditions and actual conditions,and target signals are calculated based on this attitude relationship and measured data.According to the system's frequency response function,the driving signals are iterated until the system's response signals converge with the target signals.Finally,the iteratively obtained load spectra are utilized for fatigue life analysis.The results show that the virtual VTR can effectively and accurately obtain the results of fatigue analysis and has engineering application significance.展开更多
该设计采用图形编程语言LabVIEW 7.0在W in 2000下编写设计程序,实现整个测试系统在虚拟仪器界面上直接进行操作,实现信号采集、数据处理、绘制图表及存盘打印等功能。完成了电液比例流量阀的稳态控制特性、稳态负载特性、阶跃特性、曲...该设计采用图形编程语言LabVIEW 7.0在W in 2000下编写设计程序,实现整个测试系统在虚拟仪器界面上直接进行操作,实现信号采集、数据处理、绘制图表及存盘打印等功能。完成了电液比例流量阀的稳态控制特性、稳态负载特性、阶跃特性、曲线拟合等试验项目。可视化的操作界面,既减小了实验人员的工作强度又提高了工作效率和测试精度。展开更多
基金Shandong Province Science and Technology SMES innovation ability improvement project and Rizhao Key Research and Development Project,Grant/Award Number:2022TSGC2504National Natural Science Foundation of China,Grant/Award Number:52378402+1 种基金Shandong Provincial Natural Science Foundation Youth Project,Grant/Award Numbers:ZR2022QE021,ZR202211100077Taishan Scholar Project,Grant/Award Number:tsqn202312024。
文摘To obtain accurate fatigue life results for construction machinery components,acquiring load spectra is crucial,as their authenticity and validity directly determine the precision of the analysis.In working conditions,component attitudes change continuously,but they remain static on the vibration test rig(VTR),so the acquired target signals should match with the actual component attitudes in the driving signal generation.This paper proposes an efficient and economical simulation-based virtual VTR for fatigue analysis of dozers.First,the relationship between the push arm rotation angle and the cylinder stroke is established,since the cylinder strokes can be measured easily in data acquisition experiments.Second,load decomposition is used to determine the attitude relationship between virtual VTR conditions and actual conditions,and target signals are calculated based on this attitude relationship and measured data.According to the system's frequency response function,the driving signals are iterated until the system's response signals converge with the target signals.Finally,the iteratively obtained load spectra are utilized for fatigue life analysis.The results show that the virtual VTR can effectively and accurately obtain the results of fatigue analysis and has engineering application significance.
文摘该设计采用图形编程语言LabVIEW 7.0在W in 2000下编写设计程序,实现整个测试系统在虚拟仪器界面上直接进行操作,实现信号采集、数据处理、绘制图表及存盘打印等功能。完成了电液比例流量阀的稳态控制特性、稳态负载特性、阶跃特性、曲线拟合等试验项目。可视化的操作界面,既减小了实验人员的工作强度又提高了工作效率和测试精度。
