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中文摘要：
针对实际振动位移难以获取的问题．利用振动位移与加速度信号之间的关系，先对采样后的加速度信号采用时域数值积分，得到含有趋势项的速度信号及位移信号，再采用拟合多项式极值的方法，消除积分过程中产生的趋势项．从而得到更为精确的速度和位移信号．算例表明．利用拟合多项式极值消除趋势项的方法，得到的位移时程曲线拟合精度高．
英文摘要：
In practical engineering, the collection of displacement data is more difficult than that of the acceleration data in the time-domain. Displacement signals was got from acceleration signals using aumerical integration, with the trend of error. Polynomial fitting method of extreme value to eliminate the trend of error was proposed. More precise displacement data can be acquired from this algorithm. The example shows that this algorithm can get high accuracy displacement data from the acceleration data more easily.
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