Research on modeling method of top-level function decomposition and allocation for aviation power equipment

doi:10.11996/JG.j.2095-302X.2024020292

Abstract

Abstract:

Focused on the problems of top-level functional decomposition and allocation for aviation power equipment, such as overly reliance on experience, unreasonable division of functional interfaces, and unclear functional undertaking of subsystems, this paper proposed a model-based functional analysis method for aviation power equipment by studying the characteristics and advantages of MBSE modeling method, system modeling language (SysML) and by integrating behavior diagram, structure diagram, and matrix view into the functional design activities. Firstly, the system boundary and interaction information of aviation power equipment were identified through modeling of environment background diagram. Secondly, the top-level functions of the system were analyzed through use case diagram. Each top-level function was analyzed through modeling by automatically generating associated activity diagrams from the use case. The initial decomposition of functions was realized through conceptual scheme demonstration, and iterated with system architecture modeling and functional hazard assessment (FHA) to complete the detailed decomposition. Finally, the function list of subsystems was obtained through allocation matrices and allocation views, serving as the input for subsystem function analysis. The research demonstrated that the model-based method could effectively address the problem of unclear functional decomposition and allocation in the field of aviation power equipment. The typical cases of constructed functional model could provide a technical path for the subsequent construction of aviation power equipment digital prototypes 1.0.

Key words: systems engineering, positive design, functional modeling, decomposition &, allocation, SysML

CLC Number:

TP391

HE Wenhu, LIU Wei, WANG Youlong, CAI Hui. Research on modeling method of top-level function decomposition and allocation for aviation power equipment[J]. Journal of Graphics, 2024, 45(2): 292-299.

Figures/Tables 10

Fig. 1 Model-based functional analysis process for aviation power equipment

Fig. 2 The interaction of aviation power equipment system in combat use scenario

Fig. 3 Aviation power equipment top level function

Fig. 4 Thrust requirements for aviation power equipment

Fig. 5 Logical architecture of aviation power equipment

Fig. 6 Thrust requirements for aviation power equipment provide thrust function modeling results (part)

Fig. 7 Top-level function allocation matrix global view (part)

Fig. 8 The function of compression system

Fig. 9 The function of exhaust system

Fig. 10 The function of control system

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