请帮我用pytorch写一个读取TXT文件只有一列振动信号后利用1DCNN模型建立故障诊断的列子
时间: 2024-03-07 16:48:15 浏览: 17
好的,下面是一个简单的示例代码,其中使用PyTorch读取txt文件只有一列振动信号,然后使用1DCNN模型建立故障诊断模型:
```python
import torch
import torch.nn as nn
import torch.optim as optim
import numpy as np
# 定义1DCNN模型
class CNN(nn.Module):
def __init__(self):
super(CNN, self).__init__()
self.conv1 = nn.Conv1d(in_channels=1, out_channels=16, kernel_size=5, stride=1)
self.pool1 = nn.MaxPool1d(kernel_size=2)
self.conv2 = nn.Conv1d(in_channels=16, out_channels=32, kernel_size=5, stride=1)
self.pool2 = nn.MaxPool1d(kernel_size=2)
self.fc1 = nn.Linear(32*23, 128)
self.fc2 = nn.Linear(128, 10)
self.fc3 = nn.Linear(10, 2)
self.relu = nn.ReLU()
self.dropout = nn.Dropout(p=0.5)
def forward(self, x):
x = self.conv1(x)
x = self.relu(x)
x = self.pool1(x)
x = self.conv2(x)
x = self.relu(x)
x = self.pool2(x)
x = x.view(x.size(0), -1)
x = self.fc1(x)
x = self.relu(x)
x = self.dropout(x)
x = self.fc2(x)
x = self.relu(x)
x = self.dropout(x)
x = self.fc3(x)
return x
# 读取数据
data = np.loadtxt('data.txt')
data = torch.from_numpy(data).float().unsqueeze(0).unsqueeze(0)
# 定义模型
model = CNN()
# 定义损失函数和优化器
criterion = nn.CrossEntropyLoss()
optimizer = optim.Adam(model.parameters(), lr=0.001)
# 训练模型
for epoch in range(100):
optimizer.zero_grad()
output = model(data)
loss = criterion(output, torch.LongTensor([1]))
loss.backward()
optimizer.step()
if (epoch+1) % 10 == 0:
print('Epoch [{}/{}], Loss: {:.4f}'.format(epoch+1, 100, loss.item()))
# 保存模型
torch.save(model.state_dict(), 'model.ckpt')
```
需要注意的是,这里的数据格式为一维数组,而1DCNN模型需要的输入格式为(batch_size, channels, length),因此需要将数据转换为(batch_size, channels=1, length)的格式。另外,这里只是一个简单的示例代码,实际应用中需要根据具体情况进行修改。