新手求助！信号的预处理！
我从读出的数据中提出了两列，部分如下：258.1191 0.0113
258.1201 0.0100
258.1211 0.0086
258.1221 0.0086
258.1230 0.0100
258.1240 0.0113
258.1250 0.0126
258.1260 0.0126
258.1270 0.0113
258.1279 0.0113
258.1289 0.0100
258.1299 0.0100
258.1309 0.0100
258.1318 0.0100
258.1328 0.0113
258.1338 0.0113
258.1348 0.0113
258.1357 0.0100
258.1367 0.0113
258.1377 0.0113
258.1387 0.0113
258.1397 0.0100
258.1406 0.0100
258.1416 0.0086
258.1426 0.0086
258.1436 0.0100
258.1445 0.0100
258.1455 0.0113
258.1465 0.0113
258.1475 0.0113
258.1484 0.0100
258.1494 0.0113
258.1504 0.0113
258.1514 0.0126
258.1523 0.0126
258.1533 0.0139
258.1543 0.0126
258.1553 0.0126
258.1563 0.0113
258.1572 0.0100
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258.1592 0.0100
258.1602 0.0113
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258.1631 0.0126
258.1641 0.0113
258.1650 0.0113
258.1660 0.0113
258.1670 0.0113
258.1680 0.0113
258.1690 0.0113
258.1699 0.0126
258.1709 0.0126
258.1719 0.0139
258.1728 0.0139
258.1738 0.0139
258.1748 0.0113
258.1758 0.0100
258.1768 0.0073
258.1777 0.0073
258.1787 0.0100
258.1797 0.0126
258.1807 0.0152
258.1816 0.0152
258.1826 0.0152
258.1836 0.0126
258.1846 0.0100
258.1855 0.0100
258.1865 0.0113
258.1875 0.0126
258.1885 0.0152
258.1895 0.0152
258.1904 0.0139
258.1914 0.0126
258.1924 0.0113
258.1934 0.0113
258.1943 0.0113
258.1953 0.0113
258.1963 0.0126
258.1973 0.0139
258.1982 0.0139
258.1992 0.0139
258.2002 0.0139
258.2012 0.0113
258.2022 0.0086
258.2031 0.0073
258.2041 0.0073
258.2051 0.0100
258.2061 0.0113
258.2070 0.0139
258.2080 0.0139
258.2090 0.0139
258.2100 0.0126
258.2109 0.0113
258.2119 0.0113
258.2129 0.0113
258.2139 0.0126
258.2148 0.0139
258.2158 0.0126
258.2168 0.0113
258.2178 0.0100
258.2188 0.0086
258.2197 0.0100
258.2207 0.0113
258.2217 0.0139
258.2227 0.0139
258.2236 0.0139
258.2246 0.0113
258.2256 0.0100
258.2266 0.0086
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258.2285 0.0100
258.2295 0.0113
258.2305 0.0113
258.2315 0.0113
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258.2334 0.0126
258.2344 0.0126
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258.2373 0.0126
258.2383 0.0113
258.2393 0.0113
258.2402 0.0113
258.2412 0.0113
258.2422 0.0126
258.2432 0.0139
258.2441 0.0139
258.2451 0.0126
258.2461 0.0113
258.2471 0.0113
258.2480 0.0113
258.2490 0.0113
258.2500 0.0139
258.2510 0.0152
258.2520 0.0152
258.2529 0.0139
258.2539 0.0113
258.2549 0.0100
258.2559 0.0073
258.2568 0.0073
258.2578 0.0073
258.2588 0.0086
258.2598 0.0100
258.2607 0.0113
258.2617 0.0113
258.2627 0.0126
258.2637 0.0113
258.2647 0.0113
258.2656 0.0113
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258.2686 0.0126
258.2695 0.0126
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258.2725 0.0126
258.2734 0.0126
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258.2764 0.0126
258.2773 0.0126
258.2783 0.0139
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258.2803 0.0139
258.2813 0.0126
258.2822 0.0113
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258.2842 0.0100
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258.2861 0.0113
258.2871 0.0113
258.2881 0.0113
258.2891 0.0113
258.2900 0.0113
258.2910 0.0113
258.2920 0.0113
258.2930 0.0113
258.2940 0.0100
258.2949 0.0100
258.2959 0.0113
258.2969 0.0113
258.2978 0.0126
258.2988 0.0126
258.2998 0.0126
258.3008 0.0126
258.3018 0.0126
258.3027 0.0113
258.3037 0.0113
258.3047 0.0113
258.3057 0.0113
258.3066 0.0113
258.3076 0.0113
258.3086 0.0113
258.3096 0.0113
258.3105 0.0113
258.3115 0.0100
258.3125 0.0100
258.3135 0.0100
258.3145 0.0100
258.3154 0.0100
258.3164 0.0113
258.3174 0.0113
258.3184 0.0113
258.3193 0.0113
258.3203 0.0100
258.3213 0.0100
258.3223 0.0100
258.3232 0.0100
258.3242 0.0113
258.3252 0.0113
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258.3272 0.0113
258.3281 0.0100
258.3291 0.0100
258.3301 0.0100
258.3311 0.0100
258.3320 0.0113
258.3330 0.0113
258.3340 0.0113
258.3350 0.0113
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258.3379 0.0086
258.3389 0.0100
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258.3408 0.0126
258.3418 0.0139
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258.3438 0.0139
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258.3457 0.0126
258.3467 0.0113
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258.3486 0.0100
258.3496 0.0113
258.3506 0.0113
258.3516 0.0126
258.3525 0.0139
258.3535 0.0139
258.3545 0.0126
258.3555 0.0113
258.3565 0.0100
258.3574 0.0086
258.3584 0.0086
258.3594 0.0086
258.3603 0.0100
258.3613 0.0113
258.3623 0.0113
258.3633 0.0113
258.3643 0.0113
258.3652 0.0100
258.3662 0.0100
258.3672 0.0100
258.3682 0.0100
258.3691 0.0100
258.3701 0.0113
258.3711 0.0113
258.3721 0.0113
258.3730 0.0113
258.3740 0.0113
258.3750 0.0113
258.3760 0.0113
258.3770 0.0100
258.3779 0.0100
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258.3799 0.0100
258.3809 0.0113
258.3818 0.0113
258.3828 0.0126
258.3838 0.0126
258.3848 0.0126
258.3857 0.0126
258.3867 0.0113
258.3877 0.0100
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258.3897 0.0100
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258.3916 0.0100
258.3926 0.0100
258.3936 0.0100
258.3945 0.0100
258.3955 0.0100
258.3965 0.0100
258.3975 0.0113
258.3984 0.0126
258.3994 0.0139
258.4004 0.0139
258.4014 0.0126
258.4023 0.0113
258.4033 0.0100
258.4043 0.0100
258.4053 0.0100
258.4063 0.0100
258.4072 0.0113
258.4082 0.0126
258.4092 0.0139
258.4102 0.0126
258.4111 0.0113
258.4121 0.0100
258.4131 0.0086
258.4141 0.0073
258.4150 0.0086
258.4160 0.0100
258.4170 0.0126
258.4180 0.0139
258.4190 0.0139
258.4199 0.0126
258.4209 0.0113
258.4219 0.0086
258.4228 0.0073
258.4238 0.0073
258.4248 0.0086
258.4258 0.0100
258.4268 0.0126
258.4277 0.0126
258.4287 0.0126
258.4297 0.0126
258.4307 0.0113
258.4316 0.0100
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258.4346 0.0113
258.4355 0.0126
258.4365 0.0126
258.4375 0.0126
258.4385 0.0126
258.4395 0.0113
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258.4424 0.0126
258.4434 0.0139
258.4443 0.0152
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258.4463 0.0139
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258.4531 0.0113
258.4541 0.0126
258.4551 0.0126
258.4561 0.0139
258.4570 0.0126
258.4580 0.0126
258.4590 0.0100
258.4600 0.0086
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258.4619 0.0100
258.4629 0.0113
258.4639 0.0139
258.4648 0.0152
258.4658 0.0139
258.4668 0.0126
258.4678 0.0113
258.4688 0.0100
258.4697 0.0100
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258.4717 0.0126
258.4727 0.0126
258.4736 0.0113
258.4746 0.0113
258.4756 0.0100
258.4766 0.0113
258.4775 0.0113
258.4785 0.0113
258.4795 0.0113
258.4805 0.0113
258.4815 0.0100
258.4824 0.0100
258.4834 0.0113
258.4844 0.0113
258.4853 0.0113
258.4863 0.0113
258.4873 0.0100
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258.4902 0.0126
258.4912 0.0139
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258.4932 0.0139
258.4941 0.0126
258.4951 0.0100
258.4961 0.0086
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258.4980 0.0113
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258.5215 0.0086
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258.5332 0.0113
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258.5576 0.0113
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258.5811 0.0126
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258.5898 0.0139
258.5908 0.0126
258.5918 0.0113
258.5928 0.0100
258.5938 0.0100
258.5947 0.0113
258.5957 0.0139
258.5967 0.0152
258.5977 0.0164
258.5986 0.0164
258.5996 0.0152
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258.6025 0.0139
258.6035 0.0126
258.6045 0.0126
258.6055 0.0126
258.6065 0.0126
258.6074 0.0126
258.6084 0.0126
258.6094 0.0113
258.6103 0.0113
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258.6123 0.0126
258.6133 0.0126
258.6143 0.0139
258.6152 0.0152
258.6162 0.0152
第一列为时间，第二列是振动加速度，我用plot，只能作出时程表示，怎么转换频域表示？频域表示后该进行怎么样的预处理呢？直流分量的去除和趋势项的去除，老师建议我直接选用滤波器，请大家告诉我，到底该怎么做啊？惭愧的很，纯属初学，什么都不太懂，学起来好困难的。 麻烦各位老师给看下吧！谢谢了！ 我 现在可以做出傅里叶变换了，但是图的横坐标不是频率，应该是点数，点数乘以时间间隔就是频率吗？再就是，针对这种加速度信号，预处理采用什么方法啊，最小二乘法吗？还请高手帮我解惑
假定加速度为g, 做了去除直流(减均值), 积分前低通滤波, 我的结果为:
1. 加速度
[ 本帖最后由 TestGuru 于 2009-5-4 18:39 编辑 ] 2. 速度
3. 位移
谢谢您，不知道能看下您编的程序不能？我太弱了。。 哦, 我没有编程，是直接下载该软件:www.multi-instrument.com/MIsetup.exe。安装并运行软件后, 点击主菜单中的[文件]>[输入], 然后调入"地板"层的111.txt文本文件即可. 该文件是将你的原始数据中的“空格”置换为“，”，再加入文件头和序号列即可。用EXCEL改很容易。 以上结果没有对原始数据进行滤波处理，若你需要，可在时域中设置滤波器即可，有多种滤波器可选。
回复 7楼 woaiclan 的帖子
养成好习惯, 动手搜一下! 论坛里已经很多了! 我跟楼主遇到同样的问题，楼主解决了吗？能否指导一下
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