# Design and Application of Logical Range Framework Based on Digital Twin
## 1 Introduction
In terms of research on digital twin technology in the aerospace field, some scholars [17; 18; 19] have conducted in-depth research on digital twin modeling methods for aerospace parts and components, while other scholars [20; 21; 22] have studied the specific application of digital twins in the aerospace field, as well as designing methods and frameworks to realize and apply digital twin technology. In view of the existing research on digital twins in the field of flight testing, [PERSON] et al. [23] proposed the application prospect of six digital twins for flight testing, including the development and overall planning of flight test requirements, flight test task design, integrated testing and modification, flight test organization and implementation, rapid maintenance support, and flight test engineer training. [PERSON] et al. [24] designed a digital twin flight test simulation platform which can simulate flights in a virtual scene. Compared with the real flight test results, the virtual flight test on the platform can meet the real-time and stability requirements of the flight. In the research of digital twin framework, [PERSON] et al. [25] designed an aerospace digital twin workshop framework and elaborated on the application of digital twin in aerospace intelligent manufacturing scenarios. This framework provides a feasible technical approach for workshop production control in military enterprises. [PERSON] et al. [26] proposed a three-dimensional real-time monitoring system framework for workshop production status for digital twin, and detailed several key technologies in the framework implementation process. Finally, the feasibility and effectiveness of the proposed framework were verified by a seal production workshop. Although [PERSON] et al. [23] have studied the application of digital twin in the field of flight testing, their research only proposes some prospects for the application of digital twin technology in flight testing, without elaborating and solving problems encountered during the implementation process. Although the flight test simulation platform designed by [PERSON] et al. [24] can meet the experimental requirements of virtual flight tests, its platform cannot meet the requirements of cross-regional joint flight tests. The digital twin framework proposed by [PERSON] et al. [25] and [PERSON] et al. [26] is applicable to aerospace production workshops and seal production workshops, respectively. Due to the lack of connectivity between the flight test process and the production process in the production workshop, the equipment used in the flight test and production workshop are also different. The framework proposed by the above two scholars cannot be applied to cross-regional flight testing. In addition, the proposed framework cannot meet the need for dynamic expansion of equipment during cross-regional flight testing. In summary, scholars have made significant achievements regarding the use of Digital Twin technology to solve problems in the corresponding fields. However, there have been few studies on the construction of digital twin frameworks, key technologies, and test process monitoring for flight testing using the Logical Range concept. Therefore, in order to use Digital Twin technology to solve the problems associated with existing Logical Range approaches, as well as to satisfy the actual needs of Logical Range construction in the flight test process, we propose and implement a Logical Range framework based on digital twin technology. Furthermore, we verify the proposed framework in the context of the flight test process for an aircraft. Our key contributions are as follows:  
* We analyze the problems related to existing Logical Range approaches and propose a Logical Range framework based on digital twin technology. * We implement the proposed framework and introduce several key technologies used in the system based on the framework. * We verify the feasibility of our proposed framework through a flight test.