Construction Of Virtual Models Research Articles

Digital Twin Technology of Human–Machine Integration in Cross-Belt Sorting System

The Chinese express delivery industry processes nearly 110 billion items in 2022, averaging an annual growth rate of 200%. Among the various types of sorting systems used for handling express items, cross-belt sorting systems stand out as the most crucial. However, despite their high degree of automation, the workload for operators has intensified owing to the surging volume of express items. In the era of Industry 5.0, it is imperative to adopt new technologies that not only enhance worker welfare but also improve the efficiency of cross-belt systems. Striking a balance between efficiency in handling express items and operator well-being is challenging. Digital twin technology offers a promising solution in this respect. A realization method of a human–machine integrated digital twin is proposed in this study, enabling the interaction of biological human bodies, virtual human bodies, virtual equipment, and logistics equipment in a closed loop, thus setting an operating framework. Key technologies in the proposed framework include a collection of heterogeneous data from multiple sources, construction of the relationship between operator fatigue and operation efficiency based on physiological measurements, virtual model construction, and an online optimization module based on real-time simulation. The feasibility of the proposed method was verified in an express distribution center.

Digital twin for a robot assembly line: Architecture and implementation

As an enabling technology and means to practice the concept of intelligent manufacturing, digital twin has attracted extensive attention from both industry and academia. In view of the lack of concrete implementation methods of digital twin robot assembly lines, and the complex implementation process, and long development cycle using existing methods, the implementation of digital twin robot assembly lines is a significant research problem. In view of this, this paper proposes an architecture as well as an implementation method of a digital twin system for a robot assembly line. Taking a robot assembly production line as an example, a digital twin architecture and modular development approach are proposed, and three key technologies for implementing the digital twin system, namely virtual model construction, real-time data acquisition and accurate virtual-real mapping, are elaborated. The architecture and implementation method can quickly and effectively facilitate building a digital twin system of the robot assembly line, and realizing real-time monitoring and intelligent analysis of all elements of the physical robot production line.

Digital Protection of Historic Buildings in Urban Planning.

With the rapid development of urbanization, urban land has been expropriated and developed on a large scale. Moreover, people's awareness of the protection of historical buildings is relatively weak, so some historical buildings have been demolished or rebuilt. Historical buildings have played an important role in the spread of national culture, so how to use some methods to protect historical buildings from being destroyed has become an urgent problem to be solved. The protection of historical buildings includes a series of complicated and rigorous procedures, such as on-site drawing and mapping, survey and design, and scheme discussion and construction. The surveying and mapping of traditional historical buildings require people to do it by themselves, so it is inevitably time-consuming and labor-intensive. This paper first discussed and analyzed the significance of historical building protection, and then used digital technology to make up for the shortcomings of traditional manual surveying and mapping and historical building protection methods. Modern technologies such as three-dimensional laser scanning technology and virtual reality technology are used to restore the style and appearance of historical buildings. Among them, in terms of the color of historical buildings, the restoration degree of buildings based on digital protection technology has reached 56.1%; at the same time, the efficiency of information collection and processing, and virtual model construction has also been improved. Thus, the ultimate goal of historical building protection is achieved, and it provides a reference for the digital protection of historical buildings.

Restoration Design of Chu Architecture: Zhanghua Tower Based on VR Technology.

The restoration design of Chinese traditional ancient buildings by VR technology can help to form a new media of ancient building culture and promote the process of digital protection in buildings. Studying the restoration design of Chinese traditional ancient buildings under VR technology can effectively protect the ancient building culture. This paper analyzes the unique design style of Chu architecture and integrates it into VR architecture restoration design. By taking the Zhanghua tower, a representative building in Chu, as an example, this paper expounds on the realization process of restoration design of ancient buildings in Chu. In addition, through 3 ds max and Unity3D platform, the plane shape description, virtual model construction, virtual model optimization, and virtual scene construction are completed, and the virtual space experience of Chu architecture is realized by using Virtools software.

Dynamic Modeling and Full-Process Simulation of the Core Engine Test Rig Main Test System

As a virtual digital model that can reflect physical entities or systems, digital twins are revolutionizing industry. The first prerequisite for the construction of digital twins is the establishment of high-precision and complex entities or system models. A 47-components numerical system is established for the core engine test rig main test system by using the finite volume modularization modeling method. A comprehensive solution to the system-level valve-spool/orifice throttling modeling, the key issue of the fluid pipeline system modeling, is presented, and the algorithms of throttling and mixing are deepened and expanded. The full-process simulation study on two tests of normal-temperature 1400 s and low-temperature 1240 s shows that the combined regulation of five regulator valves and the change of cold source directly decide dynamic change of the system in each stage; the simulation reveals the phenomena such as the gas cylinder cooling with deflation, the air cooling when expanding from main pipeline to two branch pipelines, shunting flow by branch pipeline, and the cold and hot gases mixing; the overall variation trends of the simulation curves are consistent with those of all the experimental curves of the test rig normal-temperature/low-temperature air supply lines, exhaust bypass, and engine main line in two operating conditions, and the maximum error between simulation curves and test curves of pressure, total pressure, and total temperature is less than 12%. The numerical system can be used for the construction of virtual models of digital twins, and the modeling method provides a feasible solution to the key technology of digital twins.

Simulation application of virtual reality technology in legal education

The virtual simulation teaching of law is a systematic practice course of judicial case handling. This course introduces VR technology, enabling testers to play the role of a judicial officer in a virtual environment to handle cases. This design is realized through the intersection of the teaching design by the arts and sciences, the construction of virtual models, and man-machine interaction. Through this design, students can improve their ability to handle cases, develop students’ thinking, and enhance students’ ability to use their knowledge comprehensively. In order to ensure better experimental results, it is necessary to provide technical support from scene simulation, case simulation, mechanism simulation and so on.

Methodology of planning of landscape and ecological sustainability of natural components in the virtual model (on the example of Volgograd)

Urban planning is a critical issue in urban planning around the world. Real monitoring of landscape and environmental processes, urban planning and sustainable development designers associate with the construction of virtual models. The aim of the study is to develop methodological approaches to planning in the field of landscape and environmental sustainability taking into account the landscape features of the city of Volgograd and the formation of a topographic basis of a virtual model aimed at resolving environmental, social and figurative problems of the city. The construction of the landscape object of the Green ring in the suburban area of Volgograd and the environmental impact of the water surfaces of the Volga river on the sustainable development of the comfortable spaces of the city were analyzed. The modeling for the integration of a system of natural components of the landscape based on the climate aspect and the specifics of the topography in the virtual model of landscape ecological sustainable development the water-green landscapeology. The results of the study reveal the scientific and methodological provisions of urban planning and establish practical goals and implementation of virtual models aimed at preserving the true image of the city

From survey data to virtual environment. Two case studies

In this paper we present the latest experiences carried out by our research group in the field of multimedia communication. Starting from the construction of virtual models, interactive and non-interactive, we pursued the aim to introduce edutainment paths in some museum contexts, both increasing the value of cultural assets and creating an attractive pole for the visitors. The current trends are gradually transforming museums from static places of conservation into active and engaging spaces to deliver accessible culture to the masses, using digital technologies for creating new paradigms of interaction and enhance the experience of the visitor. Here we present two case studies, whose purpose is to bring together the different competences by various experts to test the potential of digital products as non-formal teaching tools to allow a satisfying learning experience. The case explored are those of the Civic Museum of Schifanoia (Ferrara) and the octagonal cloister of the Carracci in San Michele in Bosco (Bologna). The multimedia products discussed here relate to these two research themes, and up to now 3 out of 5 planned products have been made (in final mode, or in prototype form). The experimentation led to concrete results that introduced a reflection on what investigative methodologies and protocols are more suitable to be adopted in these cases, in compliance to the aim identified by the project.