PDF(1587 KB)
PDF(1587 KB)
PDF(1587 KB)
应变梁多源载荷校准模型的误差估计方法
Error Estimation Method for Multi-source Load Calibration Model of Strain Beams
应变梁是应变传感器高精度校准的重要工具。但受到激励衰减和响应测不准的双重影响,多源载荷作用下的应变梁校准模型极易出现偏差。为此,提出了多源载荷校准误差估计方法。该方法根据应变梁悬臂的受力特性,分析了多源激励与测量切面结构响应之间的载荷传递关系,建立了测量切面应力模型;在最小二乘法的基础上,通过线性经验验证和抵消策略,对输入-输出多变量误差进行近似线性拟合,建立了多变量误差正规方程;采用矩阵求逆运算方法实现正规方程的回归系数辨识。为了验证该方法的有效性,搭建了应变梁校准系统,完成了多源载荷加载实验。实验结果表明,该方法的准确度均优于0.99;相对估计误差优于1.3%。
The strain beam is an important tool for high-precision calibration of strain sensors. However, due to the dual influence of excitation attenuation and inaccurate response measurement, the load calibration model of strain beam under multi-source load is easy to deviation. For this reason, a multi-source load calibration error estimation method is proposed to error estimation. According to the mechanical characteristics of the cantilever of the strain beam, the load transfer relationship between the multi-source excitation and the measured section of the structural response is analyzed, and the stress model of the measured section is established. In order to verify the effectiveness of this method, a strain beam calibration system is built, and a multi-source load loading experiment is completed. Experimental results show that the accuracy of the proposed method is better than 0.99, and the relative estimation error is better than 1.3%.
力学计量 / 应变梁 / 载荷校准 / 参数辨识 / 最小二乘法 / 多源加载
mechanical metrology / strain beams / load calibration / parameter identification / least squares / multi-source loading
| [1] |
李苗, 任伟新, 胡异丁, 等. 基于解析模态分解法的桥梁动态应变监测数据温度影响的分离[J]. 振动与冲击, 2012, 31(21): 6-10.
|
| [2] |
|
| [3] |
张开玉, 赵洪, 张伟超, 等. 基于等应变梁的光纤光栅静电电压传感器[J]. 光学学报, 2015, 35(3):71-78.
|
| [4] |
|
| [5] |
|
| [6] |
|
| [7] |
|
| [8] |
袁兴起, 陈恺, 崔建军, 等. 应变传感器计量特性的校准方法[J]. 计量学报, 2018, 39(6):836-841.
|
| [9] |
王霄. 应变式加速度传感器灵敏度校准虚拟仪器设计[J].仪器仪表学报, 2006, 27(S1):342-343.
|
| [10] |
李玉涵, 杨宝玉, 吴亦农, 等. 卫星光机载荷热模型参数高效修正方法研究进展[J]. 航空学报, 2024, 45(6):628814.
|
| [11] |
荆根强, 段发阶, 彭璐, 等. 基于被动激励的结构应变监测系统在线校准方法[J]. 仪器仪表学报, 2021, 41(8):137-145.
|
| [12] |
余建虎. 飞机飞行载荷校准试验约束补偿技术[J].航空学报, 2023, 44(19):133-140.
|
| [13] |
杜亚志, 王学滨, 董伟, 等. 基于一阶及二阶DIC方法的常应变剪切带的测量误差分析[J]. 计量学报, 2018, 39(1):66-71.
|
| [14] |
|
| [15] |
|
| [16] |
|
| [17] |
李慧乐, 严欢, 吴刚. 移动荷载下考虑钢筋作用的混凝土裂缝梁动力响应分析[J]. 振动与冲击, 2024, 43(12):140-147.
|
| [18] |
闫东东, 胡宇博, 郎利辉. 大跨距复合材料结构弯曲载荷监测及定位方法[J]. 中国机械工程, 2023, 34(18):2257-2267.
|
| [19] |
|
| [20] |
|
| [21] |
黄岩, 韩东颖, 朱国庆, 等. 基于时域多参数信息融合与机器学习算法的井架钢结构损伤识别[J]. 计量学报, 2024,43(5):698-705.
|
| [22] |
王朋朋, 赵士伟, 孟文蓉, 等. 基于最小二乘法的海洋温度传感器动态响应特性测量不确定度研究[J]. 计量学报, 2023,44(6): 886-892.
|
/
| 〈 |
|
〉 |