中文说明：基于数值积分的加速度信号测取位移方法，属于信号处理领域。该方法先对离散加速度信号进行数值积分，再对积分后的信号利用包络法进行修正。经两次积分，两次包络法修正后就可以得到位移信号。该方法利用包络法来修正积分后的速度和位移信号，能够很好的消除积分过程产生的趋势项和抑制噪声的干扰，进而得到有效的位移信号。 加速度信号由于测试方便,在振动台试验中有广泛的应用,加速度信号进行两次积分后就是位移的信号,但由于常数的存在,往往发生积分结果的漂移. 采用加速度信号的频域积分可以解决此问题，根据王济的《MATLAB在振动信号处理中的应用》中的程序，编程后运行效果良好。
English Description：
The displacement measurement method of acceleration signal based on numerical integration belongs to the field of signal processing. Firstly, the discrete acceleration signal is numerically integrated, and then the integrated signal is modified by envelope method. After twice integration and twice envelope correction, the displacement signal can be obtained. The envelope method is used to modify the velocity and displacement signals after integration, which can eliminate the trend term produced in the integration process and suppress the interference of noise, and then obtain the effective displacement signal.