A Reliability Block Diagram RBD Auxiliary Modeling Method Based on Sysml System Model

Abstract

The invention discloses a reliability block diagram RBD auxiliary modeling method based on a SysML system model. The modeling method includes the following processes: building a system model based on a normative system modeling method; extracting a use case diagram in the system model to form a task profile; analyzing system components in the system model; Execute relevant system units; construct the basic reliability block diagram model of the system / product; update the parallel structure in the basic reliability block diagram model, construct the sub-use case task reliability block diagram model; synthesize the reliability block diagram models of each sub-task use case, and obtain the system / product reliability A block diagram model of task reliability based on use cases. This method is suitable for systems / products with complex components and complex task profiles, and improves the timeliness and efficiency of reliability block diagram modeling.

Description

technical field [0001] The invention relates to the technical field of system reliability modeling, in particular to a reliability block diagram RBD auxiliary modeling method based on a SysML system model. Background technique [0002] According to the definition in GJB451A, basic reliability refers to the ability of a product to work without failure under specified conditions and within a specified period of time. Basic reliability reflects the product's requirements for maintenance resources. When determining the basic reliability value, all life units and all associated failures of the product should be counted. The definition of mission reliability refers to the ability of the product to complete the specified function within the specified mission profile. In order to analyze and evaluate the basic reliability and mission reliability level of the product, it is usually necessary to establish the reliability model of the product. In engineering practice, the reliabilit...

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Problems solved by technology

[0007] 1. It is difficult to update the reliability block diagram modeling and product / system analysis and design process synchronously, resulting in poor timeliness and insufficient effectiveness of reliability analysis and design work;

[0008] 2. The traditional reliability modeling work is highly subjective and depends on the ability and experience of modeling engineers, so it is difficult to provide a stable guarantee for the quality level of the reliability model;

[0009] 3. The traditional reliability modeling work is isolated from the product design process. Reliability modeling requires reliability engineers to have a deep understanding of the product system, and at the same time requires product designers to provide sufficient product reliability information, resulting in a lot of time and human resources for the work development process

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