由于现代科学技术的发展,很多科学实验往往在很短时间内得到的实验数据就多到惊人的数目。如在各种随机振动(飞机、各种车辆的运行等产生的振动都属随机振动)的测试中,每次实验就有大量的信号记录下来,要随时进行分析判断。我们在东方红——40轮式拖拉机的随机振动测试这项工作中,对不同路面、速度等各种情况下,进行了几十个工况实验,而每个工况的实验就有3000～5000个数据,这样,数据就有十几万个要进行分析。这些数据要求的二次处理部分复杂,往往牵涉到系统固有频率的计算,由此判断结构在动载荷下的安全及对其它结构的影响。例如,在车辆系统中路面对驾驶员的影响,这就是一个计算共振频率的问题,这些工作以前是用模拟仪器分析,而且依赖于使用者的技术水平,速度慢精度低。而对于 Due to the development of modern science and technology, many scientific experiments are often in a very short period of time to get the experimental data to an alarming number. As in a variety of random vibration (aircraft, all kinds of vehicles such as the vibration generated are random vibration) test, each experiment a large number of signals recorded, to be analyzed and judged at any time. We in the Dongfanghong - 40 wheeled tractor random vibration test in this work, on different road, speed and other circumstances, conducted dozens of conditions test, and each working condition of the experiment there is 3000 ~ 5000 data, so that there are more than ten million data to be analyzed. The secondary processing part of these data requirements is complex and often involves calculation of the natural frequency of the system to determine the safety of the structure under dynamic loads and its impact on other structures. For example, the influence of the road surface on the driver in the vehicle system is a problem of calculating the resonance frequency, which was previously analyzed using an analogue instrument and depends on the user’s skill level with low speed and low accuracy. And for