Design of a digital twin experimental system for the lifting process of the subsea control module in the subsea template
[Objective]At present,there has been a significant push both domestically and internationally to harness virtual simulation and digital twin technology for the installation process of underwater equipment.Despite these efforts,a fully functional digital twin experimental system that can perform homomorphic mapping on the lifting process of underwater production system templates,especially subsea control modules(SCMs),has yet to be developed.[Methods]To improve SCM efficiency in the subsea template hoisting and address the challenges of difficult human monitoring and high operational costs associated with the equipment hoisting process,this article presents the design of a digital twin experimental system focused on subsea templates,with SCM serving as the primary physical entity.The development of this system includes several key components:digital modeling and construction of the underwater environment,selection and implementation of sensors and sensing methods,serial port design,and the development of an interactive UI(user interface)program.Digital modeling involves using industrial software to create and assemble 3D models of the main equipment and structures within a subsea template.These models are then rendered and imported into development software to build a virtual simulation environment and a homomorphic mapping model.Sensor selection,sensing methods,and serial port design are tailored to meet the specific requirements of the experiment.The UI interactive program facilitates user interaction with the system through four modules:UI frontend interface,3D simulation scene,script postprocessing,and interface control.Clicking the button on the interface,the serial port will transmit the data collected by the sensor to the virtual system.After processing the data,the model enables real-time data transmission and model mapping.After constructing the experimental system,a validation experiment was conducted using a transparent plastic water tank and clarified tap water to simulate the underwater environment.The experimental setup comprised a scaled-down SCM mode produced using photosensitive resin and 3D-printing technology,sensors,a dark plate for ultrasonic signal reflection,data cables,serial ports,switch power supplies,computers,and interactive display screens.Experimenters manipulated the SCM models at various speeds,observing the accuracy and speed of the model mapping on the interactive display screen,as well as the precision of displayed distance data.[Results and Conclusions]The experimental verification results show that the developed digital twin experimental system can accurately map the real-time position and status of SCM and other equipment during the lifting process across different installation speeds.This data is displayed on the screen with high efficiency and accuracy,effectively addressing the challenges of difficult human monitoring and high operational costs associated with the actual equipment lifting process.Field operators can understand the real-time situation of each piece of equipment during the lifting process through this system,ensuring the safety and efficiency of the operation.This article may also serve as a reference for developing digital twin systems related to underwater equipment.
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