Obtain the structure free damping curve through the stochastic decrement method based on structure ridge absolute displacement time history data tested by shake table, establish the ARMA time series method procedure which is used to identify the structure damping.4.
3.根据试验测得的结构屋脊点的绝对位移时程数据,通过随机减量法得到结构的自由衰减曲线,编制用以识别结构阻尼的ARMA时间序列法程序。
参考来源 - 轻木—混凝土混合结构振动台试验阻尼识别研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The reasonable arithmetic and right choice of absolute displacement coder is of great importance in the improvment of system precision.
良好的算法和传感器器件——绝对位移编码器的正确选取，对参数测量精确度的提高起到了极为重要作用。
By using calibrated image, it can measure plane absolute displacement of worktable automatically via feature point extraction and gray vector matching.
该方法采用事先通过标定的图像，对自然标志(特征点)的提取和基于灰度向量匹配来完成绝对位移的测量。
The pluses comes from coder to send to the high speed counter, and the number of the high speed counter is operated in the program of PLC to get the absolute displacement anticipated.
采用PLC的高速计数器进行测量轮正转和反转时的脉冲信号的采集，通过进一步程序运算得到绝对位移量。
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