The existing control chart pattern recognition method exhibits limitations in discriminating control charts with variable chain lengths, and it demonstrates poor generalization. This study introduces an innovative Recurrent Neural Network (RNN) control chart pattern recognition method designed to enable intelligent recognition of control charts with varying chain lengths and different patterns. In this study, control charts with six different chain lengths are generated through the Monte Carlo simulation method. Prior to processing the raw data, expected values are introduced as padding. Subsequently, an RNN model is established. The trained network model is then deployed to discriminate patterns in control chart data characterized by variable chain lengths. Simulation experiments and engineering applications show that the proposed method achieves a remarkable recognition accuracy of 99.06% and demonstrates robust generalization capabilities. The outcomes of this study bear direct practical relevance to the manufacturing industry and advanced manufacturing technologies. By enhancing pattern recognition accuracy under variable chain lengths, we can more effectively monitor the production process, reduce defect rates, and elevate production efficiency.
Control chart; pattern recognition; variable chain lengths; recurrent neural networks; deep learning