Dynamic Modeling Method of Mission Reliability of a Multi-State Manufacturing System With Multiple Production Lines

Abstract

Mission reliability could systematically characterize the running state of a manufacturing system and the rationality of production task setting in advance. However, few studies can realize the mission reliability modeling, which integrates production scheduling based on fully considering the complexity, dynamics, and multi-state characteristics of a manufacturing system. Thus, a dynamic method for modeling the mission reliability of a multi-state manufacturing system with multiple production lines is proposed in this paper. First, the multi-state characteristic of manufacturing systems operation is analyzed. On this basis, considering the composition of manufacturing systems, the connotation and modeling mechanism of the mission reliability of manufacturing systems are proposed. Second, combining the discretization of machine performance states and dynamic continuity of the performance degradation process, the dynamic modeling method of multi-state machine performance and buffer usage are respectively discussed. The transfer evolution of task demands in the production line is analyzed, and the decomposition method of task scheduling and load mapping in multiple production lines is provided. Third, considering the characteristics of multiple production lines and the buffer of a manufacturing system, taking production tasks as the core and integrating production scheduling, a modeling method for the mission reliability of manufacturing systems is proposed. Finally, the effectiveness of the proposed approach is verified using a case study on the modeling of the mission reliability of a manufacturing system of aerospace parts.

Construction of an Integrated Framework for Complex Product Design Manufacturing and Service Based on Reliability Data

“…is particularly prominent. In 1957, the Electronic Equipment Reliability Advisory Group of the U.S. Department of Defense gave the definition, indices and evaluation methods of reliability in the report "Reliability of Military Electronic Equipment", which laid the foundation for the development of reliability theory in the fields of complex equipment [2], machinery [3], software [4], manufacturing [5], design [6] and PLC management [7], and it provided support for the development of product DMS integration in the fields of aerospace equipment, new energy vehicles, high-end machine tool equipment and engines, and produced great economic benefits.…”