在充分理解吸收日本JMA滤波器设计特点的基础上,由单自由度动力平衡方程入手,利用两高通滤波器相减可得到带通滤波器的方法,通过调整平衡方程参数进行了滤波器的设计,通过对日本滤波器进行模拟,验证了方法的可行性,并且通过双向递归的方法解决了时域递归方程中的相位畸变问题,最终完成中国仪器烈度滤波器的设计。 On the basis of fully understanding the design characteristics of absorbing JMA filter in Japan, starting with single-degree-of-freedom dynamic equilibrium equation, the bandpass filter can be obtained by subtracting two high-pass filters, and the filter design is made by adjusting the equilibrium equation parameters Through the simulation of the Japanese filter, the feasibility of the method is verified, and the phase distortion problem in the time-domain recursive equation is solved by a bidirectional recursion method. Finally, the design of the Chinese instrument intensity filter is completed.