中文说明：
用matlab仿真轴承故障信号构造轴承故障的仿真信号，其中轴承的固有频率fn=3000Hz , 位移常数y0=5, 阻尼系数ξ＝0.1, 冲击故障发生的周期为0.01s，采样频率fs=20KHz, 采样点数N=4096。要求：根据上述条件构造轴承故障的仿真信号，画出其时域波形及频谱图。
English Description：
The simulation signal of bearing fault is constructed by using MATLAB to simulate the bearing fault signal. The natural frequency of bearing is FN = 3000hz, the displacement constant is Y0 = 5, the damping coefficient is ξ = 0.1, the period of impact fault is 0.01s, the sampling frequency is FS = 20kHz, and the number of sampling points is n = 4096. Requirements: according to the above conditions, the simulation signal of bearing fault is constructed, and its time domain waveform and spectrum diagram are drawn.