Digital Twin Cities is a multi-disciplinary, multi-physical, multi-scale and multi-probability simulation process, which comprehensively utilizes data such as physical model, sensor update and operation history. The mapping is completed in the virtual space, thus reflecting the whole life cycle process of the corresponding entity equipment. ?

Digital pairing can be regarded as a digital mapping system of one or more important and interdependent equipment systems. It is a concept that transcends reality and has universal applicability. It has been widely used in product design, product manufacturing, medical analysis, engineering construction and other fields. In China, digital twinning has the deepest application in the field of engineering construction, but it has attracted the most attention and research in the field of intelligent manufacturing.

Data expansion:

The story of digital twins can be traced back to the Apollo program of NASA in the 1960s. At that time, in order to ensure the safety and success of space missions, NASA began to try to use digital models to simulate and analyze real-world aircraft. This digital model is the predecessor of digital twins.

In 20 10, NASA first introduced the concept of digital pairing in its space technology roadmap. In order to better understand the digital twins of NASA, we need to know a historical story about Apollo 13. 1969, Apollo 13 had a serious failure on the way to the moon, and the astronauts were in danger. ?

In order to ensure their safe return to Earth, NASA engineers quickly established a digital twin model to simulate the flight state and failure of Apollo 13. Through this digital twin model, engineers successfully analyzed the problems and worked out a set of solutions, which finally helped Apollo 13 astronauts return to Earth safely.

The concept of digital twins gradually developed in the following decades. In 2002, when Dr. Michael Grieves of the University of Michigan gave a speech to the industry to set up a product life cycle management (PLM) center, he first proposed the PLM conceptual model. The concept of digital twins between the real world and the virtual world appears in the model.

Nowadays, digital twins have been widely used in product design, product manufacturing, medical analysis, engineering construction and many other fields. Digital twin technology can not only improve work efficiency and reduce costs, but also provide more accurate and real-time data support for decision makers, thus helping them to make better strategic plans.