Interface Data Modeling to Detect and Diagnose Intersystem Faults for Designing and Integrating System of Systems

Abstract

In system of systems engineering, system integrators are in charge of compatible and reliable interfaces between subsystems. This study explains a systematic solution to identify and diagnose interface faults during designing and integrating systems of systems. Because the systems targeted in this study are real underwater vessels, we first have anatomized 188 interface data transferred between 22 subsystems of them. Based on this, two interface data models are proposed, which include data sets regarding messages and inner fields and transition and decision functions for them. Specifically, a structure model at the message level evaluates how inner fields belong to a message, and a logic model at the field level assesses how each field is interpreted and if the interpreted value is understandable. The software that supports the modeling is implemented using the following concepts: (1) a model-view-viewmodel pattern for overall software design and (2) a computer network for representing sequential properties of field interpretations. The proposed modeling and software facilitate diagnostic decisions by checking the consistency between interface protocols and obtained real data. As a practical use, the proposed work was applied to an underwater shipbuilding project. Within 10 interfaces, 14 fault cases were identified and diagnosed. They were gradually resolved during the system design and integration phases, which formed the basis of successful submarine construction.

Design and Implementation of Data-Based Validation and Evaluation System for Combat System Engineering

“…Acombat system, as a type of system-of-systems (SoS), contains computational subsystems to perform a wide range of military functions. In an underwater vessel, for example, an inertial navigation system (INS) enhances the computational accuracy of its orientation and velocity based on data from other subsystems such as electromagnetic log and global position subsystems [1]. For effective development of a combat system, it should be built and integrated using the V process, which is a standardized framework to develop complex systems such as combat systems [2].…”

Simulation Testing of Maritime Cyber‐Physical Systems: Application of Model‐View‐ViewModel

“…As the subsystems operate separately, they have multiple console panels to identify and control their operations. Next, the subsystems usually have different data formats and communication protocols [9]. To communicate between the subsystems normally, NCS requires data integration systems (DISs) to convert their input/output (I/O) data into interpretable forms.…”

Simulation Framework for Cyber-Physical Production System: Applying Concept of LVC Interoperation

“…For example, through the IoT sensors, realtime data such as various facilities, workers, transportation equipment, and factory environment can be obtained [5,6]. It enables real-time fault detection and diagnosis [7][8][9]. Also, the acquired big data can be used to analyze and predict shop floor through artificial intelligence and machine-learning techniques [10].…”