A Hybrid Data Storage Method for a Robotic Arm Digital Twin Prototype

This paper constructs a digital twin system of robotic arm on Unity3D platform, since the digital twin system needs to store a large amount of data, we selected, in this paper, a hybrid data storage method by optimizing the database storage structure: adopting a row-based storage structure for storing real-time data and a column-based storage structure for storing historical data. Real-time data is stored with the help of SQLite database and historical data is stored with the help of HBase. Experiments illustrated that we could achieve the preliminary goal of storing data of digital twin system in a reasonable and accurate way.