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Trend-GRU Model based Time Series Data Prediction in Melt Transport Process
Dongqi Zhao,Kuangrong Hao,Lei Chen,Bing Wei,Xue-Song Tang,Xin Cai,Lihong Ren 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10
Temperature and pressure are two important performance indicators during the melt transport of polyester fiber production, which can affect the overall properties of the melt. Therefore, the accurate prediction of these two indicators is crucial for the control of melt properties. This paper proposes a data prediction model, Trend-GRU (Gated Recurrent Unit), which can extract the feature of unstable change of the melt data. On the premise that the model is not over-complicated, a new structure is designed to extract the feature of unstable change to improve the prediction accuracy. Two data sets on temperature and pressure collected from the actual production process of a spinning factory are used for comparative experiments. The results show that the accuracy of the data prediction of the proposed model is better than the original one.
Investigation on the Temperature Characteristics of Water Inner-Cooled Stator Coil of HTS Motor
Dong Qi,Zhao Junjie,Zhou Yong,Fu Xiaoli 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.6
This study investigates the temperature characteristics of water inner-cooled stator coil based on Litz wire for high temperature superconducting (HTS) motor. Rich experience in transposed Litz bundle windings is accumulated by manufacturing scaled-down water inner-cooled coil prototypes for high-capacity HTS motors. On this basis, the temperature rise test and calculation simulation are carried out. The maximum relative error between the two results is only 5.13%, which verified the rationality of the numerical temperature field calculation method. Subsequently, the effects of pipe blockage and epoxy thermal conductivity changes on the coil temperature are further explored. Thus, a relatively complete method for evaluating the temperature characteristics of water inner-cooled windings is formed, which can greatly help guide the design and manufacture of future high-capacity HTS motors.