滚动轴承多域特征提取matlab代码
时间: 2024-05-04 14:14:21 浏览: 173
滚动轴承多域特征提取是一种用于故障诊断和健康监测的常用方法。在Matlab中,可以使用信号处理和机器学习工具箱来实现滚动轴承多域特征提取。下面是一个简单的示例代码,用于提取滚动轴承的时域、频域和小波域特征:
```matlab
% 1. 读取滚动轴承振动信号数据
data = load('bearing_data.mat');
vibration_signal = data.vibration_signal;
% 2. 时域特征提取
time_domain_features = [];
time_domain_features(1) = mean(vibration_signal);
time_domain_features(2) = std(vibration_signal);
time_domain_features(3) = rms(vibration_signal);
% ...
% 3. 频域特征提取
frequency_domain_features = [];
fft_signal = fft(vibration_signal);
amplitude_spectrum = abs(fft_signal);
frequency_domain_features(1) = max(amplitude_spectrum);
frequency_domain_features(2) = sum(amplitude_spectrum.^2);
% ...
% 4. 小波域特征提取
wavelet_domain_features = [];
[c, l] = wavedec(vibration_signal, 5, 'db4');
for i = 1:5
wavelet_domain_features(i) = sum(c(l(i)+1:l(i+1)).^2);
end
% ...
% 输出特征向量
feature_vector = [time_domain_features, frequency_domain_features, wavelet_domain_features];
disp(feature_vector);
```
请注意,上述代码仅为示例,实际应用中可能需要根据具体情况进行修改和优化。另外,滚动轴承多域特征提取的方法有很多种,上述代码只是其中一种简单的实现方式。
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