基于特种车辆摆臂实测载荷的参数估计拟合外推研究
Parameter estimation fitting extrapolation based on the measured load of special vehicle swing arm
王枫 1王玺 2邓克军 2范慧 2仲健林 1熊明皓 3周超3
作者信息
- 1. 南京理工大学 机械工程学院,南京 210094
- 2. 北京航天发射技术研究所,北京 100076
- 3. 南京晨光集团有限责任公司,南京 210006
- 折叠
摘要
以特种车辆摆臂实测载荷数据为依据,对实测信号进行编制得到了实摆臂的二维载荷谱,并对其进行了参数估计的拟合外推分析,确定了幅值和频次关系服从威布尔分布优于对数正态分布,均值和频次关系服从正态分布,并将外推后的结果与实测信号进行对比验证.结果表明:参数估计拟合外推的结果在合理误差范围内;预测的极值和频次更接近于实测值,初步验证了参数估计拟合外推方法在特种车辆领域应用的合理性.
Abstract
Based on the measured load data of the swing arm of special vehicle,the two-dimensional load spectrum of the real swing arm is obtained by compiling the measured signals.The fitting extrapolation analysis of parameter estimation is conducted on the load spectrum of the measured special vehicle swing arm,confirming the amplitude-frequency follows Weibull distribution rather than lognormal distribution,and the mean-frequency follows positive distribution.Compared with the measured signals,our study shows the fitting extrapolation results of parameter estimation are within a reasonable error range.The predicted extreme value and frequency are closer to the measured values,validating the huge potential of the parameter estimation extrapolation method on special vehicles.
关键词
特种车辆/载荷谱编制/参数估计外推/分布拟合Key words
special vehicles/load spectrum preparation/parameter estimation extrapolation/distribution fitting引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据