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The 3-degree Digital Twin robotic arm for freedom can diagnose the joints off-board by placing a torque in the robotic arm joint. MATLAB, Simulink®, SimscapeTM, and Simscape Multibody were the basis of this model. Virtual space with a virtual robot arm was connected to a physical space that was a 3D printed replica of the virtual space and robot arm, built using Unity (a modern Game Engine). The arm in the Digital Twin model was created using the hardware prototype’s dimensions, which were then used to simulate a real-world situation. With its revolute joints, the arm has a certain degree of freedom. The relations between the different elements of the arm were explained through frame transformations. Simulink signal builder generates the inputs. Robotic arms are one of the most frequently used devices for manufacturing processes and can automate a range of tasks on the floor, for instance. However, for these devices to work, they must have AI that has been properly trained. It proposes a method for dealing with virtual learning to the real robot twin mapping. Considering the importance of Digital Twin, it is essential to study the research trends and research origin. Hence, in this article detailed and meticulous study of digital twin and its bibliometric analysis is carried out. Various aspects such as top research articles, funding resources, affiliations, document types, etc. are collected from the Scopus database. The bibliometric study is even extended to network analysis to understand co-author relations, and citation analysis is also presented.