Investigating the Flexibility of the MBSE Approach to the Biomass Mission
Investigating the Flexibility of the MBSE Approach to the Biomass Mission
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DOI：
10.1109/tsmc.2019.2958757
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发表时间：
2021-11
期刊：
影响因子：
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通讯作者：
J. Gregory;L. Berthoud;T. Tryfonas;A. Prezzavento;L. Faure
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作者：
J. Gregory;L. Berthoud;T. Tryfonas;A. Prezzavento;L. Faure
基于模型的系统工程(MBSE)代表了对基于文档的系统工程(DBSE)的传统方法的转变，用于促进系统工程项目中的一致性、通信、清晰度和可维护性。MBSE提供的方法可以解决与成本、复杂性和安全性相关的问题。实现这一点的一种方法是对高级别航天器功能航空电子系统进行早期功能验证。本文讨论的用例集中在Biomass模型上，这是一种基于系统建模语言的Biomass地球观测任务表示法。MBSE方法用于计算生物质号航天器上数据处理单元的所需大小。根据整个任务的机载内存使用情况，模拟了系统的功能响应。传统上，这种水平的分析在这个早期阶段是不可用的。该方法旨在用可执行、可审问和可量化的系统的正式表示来取代基于电子表格的临时计算。这种MBSE方法的灵活性通过对生物质项目应用更改和评估在生物质模型中实施这些更改所需的时间并将其传播到模拟结果中来展示。这些更改是彼此独立进行的，包括：更改逻辑架构、更改功能定义、更改任务配置文件和更改要求。强调和讨论了生物质模型结构方面可能需要改进的领域。
Model-based systems engineering (MBSE) represents a move away from the traditional approach of document-based systems engineering (DBSE), and is used to promote consistency, communication, clarity, and maintainability within systems engineering projects. MBSE offers approaches that can address issues associated with cost, complexity, and safety. One way that this can be achieved is by performing early functional validation of the high-level spacecraft functional avionics system. The use case discussed in this article focusses on the Biomass model, a systems modeling language-based representation of the Biomass Earth-observation mission. The MBSE approach is used to calculate the required size of the data handling unit onboard the Biomass spacecraft. The functional response of the system in terms of the onboard memory usage throughout the mission is simulated. Traditionally, this level of analysis would not be available at this early stage. The approach aims to replace ad hoc, spreadsheet-based calculations with a formal representation of the system that can be executed, interrogated and quantified. The flexibility of this MBSE approach is demonstrated by applying changes to the Biomass project and assessing the time required to implement these changes in the Biomass model and propagate them through to the results of the simulation. The changes have been made independently of each other and include: changes to the logical architecture, changes to the functional definition, changes to the mission profile, and changes to the requirements. Potential areas for improvement regarding the structure of the Biomass model are highlighted and discussed.