Model-Based Systems Engineering Approach to Design a Human Settlement to Better Serve Displaced People

The challenge of transitioning from temporary humanitarian settlements to more sustainable human settlements is due to a significant increase in the number of forcibly displaced people over recent decades, difficulties in providing social services that meet the required standards, and the prolongation of emergencies. Despite this challenging context, short-term considerations continue to guide their planning and management rather than more integrated, longer-term perspectives, thus preventing viable, sustainable development. Over the years, the design of humanitarian settlements has not been adapted to local contexts and perspectives, nor to the dynamics of urbanization and population growth and data. In addition, the current approach to temporary settlement harms the environment and can strain limited resources. Inefficient land use and ad hoc development models have compounded difficulties and generated new challenges. As a result, living conditions in settlements have deteriorated over the last few decades and continue to pose new challenges. The stakes are such that major shortcomings have emerged along the way, leading to disruption, budget overruns in a context marked by a steady decline in funding. However, some attempts have been made to shift towards more sustainable approaches, but these have mainly focused on vague, sector-oriented themes, failing to consider systematic and integration views. This study is a contribution in addressing these shortcomings by designing a model-driving solution, emphasizing an integrated system conceptualized as a system of systems. This paper proposes a new methodology for designing an integrated and sustainable human settlement model, based on Model-Based Systems Engineering and a Systems Modeling Language to provide valuable insights toward sustainable solutions for displaced populations aligning with the United Nations 2030 agenda for sustainable development.

X语言、方法及工具——支持MBSE的新一代一体化建模仿真技术体系

在当前基于模型的系统工程(MBSE)实践中,基于现有的建模语言、方法与工具,仍难以实现系统设计与仿真验证之间真正的闭环,因此无法完整体现MBSE的全部价值。针对这一问题,本研究较为系统地介绍了新一代建模仿真语言——X语言及其技术体系,具体包括混合系统建模框架——XDEVS,X语言架构及基本要素,X语言支持下基于建模仿真的系统工程方法论——X-SEM,以及面向X语言的建模仿真软件——XLab。基于X语言技术体系可以实现全系统统一建模和一体化仿真验证。最后用一个案例展示了基于X语言及其工具并遵循X-SEM方法论的系统开发过程。

基于WordCloud技术的MBSE发展态势研究

基于IEEE及国际系统工程协会(International Council on Systems Engineering,INCOSE)社区会刊,提取与基于模型的系统工程(model based systems engineering,MBSE)领域相关的167篇顶刊的关键词和摘要。采用Python及其第三方库WordCloud技术,以可视化形式展示MBSE领域研究内容并对MBSE发展态势进行研究。研究结果表明,MBSE在产品研发全生命周期,应用建模技术来支持系统需求、设计、分析、验证与确认等活动,在系统架构设计方面具有重要作用,将MBSE与安全性分析、可靠性分析方法结合也是MBSE的重要研究内容;系统建模语言(system modeling language,SysML)和对象过程方法(object process method,OPM)分别是目前MBSE研究领域中最受欢迎的建模语言和建模方法;将MBSE方法与本体进行结合是规范MBSE模型表达的重要手段,将MBSE与信息物理系统、数字孪生、并行工程领域进行融合研究是MBSE的重要发展方向。所提研究为使用WordCloud文本分析技术来探索当前的MBSE研究提供了技术路线参考,有助于对MBSE的未来发展态势进行预测。

MBSE在直升机航材支持场景建模中的应用

介绍了基于Rhapsody的直升机航材支持场景建模与开发的流程与方法;通过模型的方式建立用例图、活动图、顺序图和可用于执行验证的状态机来描述航材支持场景;指导直升机航材支持方案设计过程中的需求分析、功能分析和设计综合;探索MBSE方法在直升机运营保障领域的指导作用,为直升机用户航材支持提供初始建议。

基于MBSE的民机飞行控制系统架构设计

基于模型的系统工程(model-based systems engineering,MBSE)已被广泛应用于复杂系统设计之中。通过构建功能、行为和结构之间的关系,提出一种基于MBSE的多层级递进式架构设计流程。随后,以高度控制需求为导向,对民机飞行控制系统进行了示例化建模。结果表明,基于MBSE的民机飞行控制系统多层级递进式架构设计能够充分发挥数字模型可重用的优势,保证需求与功能、逻辑和物理架构的紧密结合,提高系统设计的可追溯性,可为后续领域层阶段模型设计提架构参考。

MBSE在航空飞行控制系统的应用研究

现代飞机系统的复杂性不断增长,传统的开发方法在管理和维护方面变得越来越具有挑战性。首先,对航空飞控系统研发过程在当前系统工程实践方面进行了评估,阐述了传统开发方式的不足和基于模型的系统工程(MBSE)的核心原则和优点,以及在实现中常用的工具和方法;然后,展示了MBSE如何在飞行控制系统研发时使用模型来支持复杂系统的规范、设计、分析、验证和确认的过程;最后,结合先进的MBSE工具和方法的发展,MBSE结合敏捷的开发前景,以及提高MBSE实践的互操作性和标准化的需求对未来的研究方向进行了展望。本文研究为利用MBSE方法论和工具来改进飞行控制系统的设计、开发和性能感兴趣的航空工业专业人员、系统工程师提供资源和解决思路。

基于MBSE的鱼雷全电子安全系统安全性与任务可靠性分析

随着武器装备研究的深入推进,传统方法难以满足复杂系统安全性与可靠性分析的需求;为提升系统研发与评估效率,以形式化的系统建模语言分析鱼雷全电子安全系统的安全性、可靠性成为必然趋势;文章在传统安全性与可靠性分析的基础上,基于系统工程开展安全系统建模过程,以功能需求、系统架构、活动视图以及时序逻辑控制作为安全性与作用可靠性分析的构成元素,对系统功能模型进行故障传播建模;最后以安全建模语言构建事故树模型得出安全性与可靠性的影响因素,为引信系统的安全性与可靠性分析工作提供一定参考价值。

Surrogate-based modeling and dimension reduction techniques for multi-scale mechanics problems

Successful modeling and/or design of engineering systems often requires one to address the impact of multiple ＂design variables＂ on the prescribed outcome.There are often multiple,competing objectives based on which we assess the outcome of optimization.Since accurate,high fidelity models are typically time consuming and computationally expensive,comprehensive evaluations can be conducted only if an efficient framework is available.Furthermore,informed decisions of the model/hardware＇s overall performance rely on an adequate understanding of the global,not local,sensitivity of the individual design variables on the objectives.The surrogate-based approach,which involves approximating the objectives as continuous functions of design variables from limited data,offers a rational framework to reduce the number of important input variables,i.e.,the dimension of a design or modeling space.In this paper,we review the fundamental issues that arise in surrogate-based analysis and optimization,highlighting concepts,methods,techniques,as well as modeling implications for mechanics problems.To aid the discussions of the issues involved,we summarize recent efforts in investigating cryogenic cavitating flows,active flow control based on dielectric barrier discharge concepts,and lithium（Li）-ion batteries.It is also stressed that many multi-scale mechanics problems can naturally benefit from the surrogate approach for ＂scale bridging.＂

基于MBSE的并行数字化转型模式研究

随着企业业务的日益复杂及文档数据越加繁琐,数字化转型成为了必然趋势,对基于模型的数字化转型模式进行了研究。该模式强调数字化转型的同时保持原有业务活动正常开展,通过数字化专家与领域专家合作的并行化模式,构建领域模型数据库,推动数字化转型中对信息的统一配置控制和系统工程全过程数据资产的数字化和模型化。

基于MBSE的对流层飞艇运行概念研究

面向对流层飞艇起降过程复杂、气象适应能力弱等特殊性,传统基于文本的运行概念分析方法具有设计一致性较差、设计无法有效追溯、验证困难等局限性。基于此,提出了基于模型的系统工程的对流层飞艇运行概念设计方法。首先,建立系统用例与利益攸关者需求的关联关系,保证了设计可追溯性。然后,基于活动图、时序图与内部块图建立对流层飞艇运行场景模型,详细梳理了飞艇运行的执行逻辑与外部交互关系。通过执行状态机对飞艇运行概念模型进行验证,并进一步补充完善利益攸关者需求。最后,通过执行状态机验证了该无人飞艇系统能够满足任务飞行、飞行控制和应急情况响应等利益攸关者的需求。

基于MBSE的柴油机系统设计建模方法

随着国防武器装备对动力要求越来越高,柴油机系统复杂度急剧提升,传统的以文档为核心的系统工程方法已经无法有效满足柴油机高效、准确、可靠的研制需求,为此,在柴油机研发过程中引入基于模型的系统工程(MBSE)方法。提出了基于RFLP的MBSE的柴油机系统建模流程,及支撑该流程运行的柴油机模型体系,在此基础上,以柴油机某研制任务为例,以模型为核心,给出了基于MBSE系统建模过程及模型实例,对柴油机需求分析建模、柴油机功能建模、柴油机系统架构分析与综合进行了阐述,体现了基于模型的设计方法在柴油机研制过程需求早期验证、功能快速仿真、数据可追溯方面的优势,从而有效提高研发设计效率。

Knowledge-Based Multifaceted Modeling Methodology for Open Complex Giant Systems

In this paper, the structure characteristics of open complex giant systems are concretely analysed in depth, thus the view and its significance to support the meta synthesis engineering with manifold knowledge models are clarified. Furthermore, the knowledge based multifaceted modeling methodology for open complex giant systems is emphatically studied. The major points are as follows: (1) nonlinear mechanism and general information partition law; (2) from the symmetry and similarity to the acquisition of construction knowledge; (3) structures for hierarchical and nonhierarchical organizations; (4) the integration of manifold knowledge models; (5) the methodology of knowledge based multifaceted modeling.

基于MBSE的核电厂应急预案系统的顶层需求分析与接口设计研究

在核电领域,任何意外情况都可能引发严重的后果,因此,制定科学、有效的应急预案系统是保障核电安全不可或缺的一环。作为一种先进的系统工程方法,基于模型的系统工程(MBSE)以其系统化、模型化、可视化的优势,为核电应急预案系统的设计与实施提供了新的思路和方法。探讨了MBSE在核电厂应急预案系统设计中的初步应用,分析了核电应急体系的关键要素以确定其与MBSE方法论的契合度,利用MBSE方法论进行了顶层需求的承接。针对应急体系接口问题,构建了核电应急体系各组成部分之间的交互模型。结果表明,MBSE可以提高核电厂应急预案系统设计便利性和开发效率。

A Triple Nexus Water-Energy-Housing (WEH) Framework Modelling towards Improved Decision-Making in Humanitarian Operations

Given the challenges facing most humanitarian operations worldwide, a change of approach is needed to ensure greater sustainability of humanitarian settlements right from the planning stage. Some studies attribute unsustainability to inadequate provision of basic resources and highlight the apparent bottlenecks that prevent access to the meaningful data needed to plan and remedy problems. Most operations have relied on an “ad hoc ism” approach, employing parallel and disconnected data processing methods, resulting in a wide range of data being collected without subsequent prioritization to optimize interconnections that could enhance performance. There have been little efforts to study the trade-offs potentially at stake. This work proposes a new framework enabling all subsystems to operate in a single system and focusing on data processing perspective. To achieve this, this paper proposes a Triple Nexus Framework as an attempt to integrate water, energy, and housing sector data derived from a specific sub-system within the overall system in the application of Model-Based Systems Engineering. Understanding the synergies between water, energy, and housing, Systems Engineering characterizes the triple nexus framework and identifies opportunities for improved decision-making in processing operational data from these sectors. Two scenarios illustrate how an integrated platform could be a gateway to access meaningful operational data in the system and a starting point for modeling integrated human settlement systems. Upon execution, the model is tested for nexus megadata processing, and the optimization simulation yielded 67% satisfactory results, demonstrating that an integrated system could improve sustainability, and that capacity building in service delivery is more than beneficial.

Intelligent Agent Based Mapping of Software Requirement Specification to Design Model

Automatically mapping a requirement specification to design model in Software Engineering is an open complex problem. Existing methods use a complex manual process that use the knowledge from the requirement specification/modeling and the design, and try to find a good match between them. The key task done by designers is to convert a natural language based requirement specification (or corresponding UML based representation) into a predominantly computer language based design model—thus the process is very complex as there is a very large gap between our natural language and computer language. Moreover, this is not just a simple language conversion, but rather a complex knowledge conversion that can lead to meaningful design implementation. In this paper, we describe an automated method to map Requirement Model to Design Model and thus automate/partially automate the Structured Design (SD) process. We believe, this is the first logical step in mapping a more complex requirement specification to design model. We call it IRTDM (Intelligent Agent based requirement model to design model mapping). The main theme of IRTDM is to use some AI (Artificial Intelligence) based algorithms, semantic representation using Ontology or Predicate Logic, design structures using some well known design framework and Machine Learning algorithms for learning over time. Semantics help convert natural language based requirement specification (and associated UML representation) into high level design model followed by mapping to design structures. AI method can also be used to convert high level design structures into lower level design which then can be refined further by some manual and/or semi automated process. We emphasize that automation is one of the key ways to minimize the software cost, and is very important for all, especially, for the “Design for the Bottom 90% People” or BOP (Base of the Pyramid People).

基于MBSE的鱼雷武器装备数字化研制方法

随着未来战争对鱼雷武器装备的研制和运用提出“数字化、智能化、敏捷性”的新要求,为解决鱼雷在传统基于文本研制模式下所面临的总体与分系统、设计过程与生产过程存在割裂,致使发现错误不及时、早期验证不充分、信息传递不完整、模型数据不一致、验证范围不完整以及过程追溯不清晰等切实问题,为缩短鱼雷研制周期,提高研制效率和质量,文中结合先进系统工程方法,融合新技术,在对基于模型的系统工程(MBSE)国内外实践应用研究的基础上,提出基于MBSE的鱼雷武器装备数字化研制方法,将MBSE思想方法与鱼雷技术特点和研发流程融合集成,构建跨阶段、跨专业和跨层级的鱼雷全生命周期MBSE技术体系,提出鱼雷MBSE数字化应用框架及技术路线,提炼了基于MBSE的鱼雷数字化研制过程中需要解决的主要关键技术。该方法可为鱼雷武器装备的数字化研制实践以及全面数字化转型提供参考。

基于MBSE的核反应堆型号研制平台

核能微型小型反应堆是近年来核能领域的一个研发热点,市场前景广阔。目前这些核能反应堆型号处于研发早期和中期,存在需求难以分解完整,以及需求、指标、设计方案、仿真验证、实物试验验证频繁迭代的问题。通过梳理核能反应堆型号研发关键活动,并应用创新的数字化平台和工具,搭建核能反应堆型号MBSE平台,进行型号研发项目、任务、需求、指标、功能、架构等核反应堆全生命周期管理与数据追溯,可以解决型号研发早期和中期存在的问题,提高核能反应堆型号的研发质量和研发效率,提升中国在高科技复杂系统领域的型号创新研发能力。

Statistical model for combustion of high-metal magnesium-based hydro-reactive fuel

We investigate experimentally and analytically the combustion behavior of a high-metal magnesium-based hydro- reactive fuel under high temperature gaseous atmosphere. The fuel studied in this paper contains 73% magnesium powders. An experimental system is designed and experiments are carried out in both argon and water vapor atmo- spheres. It is found that the burning surface temperature of the fuel is higher in water vapor than that in argon and both of them are higher than the melting point of magnesium, which indicates the molten state of magnesium particles in the burning surface of the fuel. Based on physical considerations and experimental results, a mathematical one-dimensional model is formulated to describe the combustion behavior of the high-metal magnesium-based hydro-reactive fuel. The model enables the evaluation of the burning surface temperature, the burning rate and the flame standoff distance each as a function of chamber pressure and water vapor concentration. The results predicted by the model show that the burning rate and the surface temperature increase when the chamber pressure and the water vapor concentration increase, which are in agreement with the observed experimental trends.

NDT-Suite: A Methodological Tool Solution in the Model-Driven Engineering Paradigm

Although the Model-Driven paradigm is being accepted in the research environment as a very useful and powerful option for effective software development, its real application in the enterprise context is still a challenge for software engineering. Several causes can be stacked out, but one of them can be the lack of tool support for the efficient application of this paradigm. This paper presents a set of tools, grouped in a suite named NDT-Suite, which under the Model-Driven paradigm offer a suitable solution for software development. These tools explore different options that this paradigm can improve such as, development, quality assurance or requirement treatment. Besides, this paper analyses how they are being successfully applied in the industry.

基于MBSE的船舶动力工程总体设计方法研究

为提升船舶动力工程的总体正向设计能力,研究船舶动力系统工程的数字化设计方法。将基于模型的系统工程(MBSE)方法理论与系统工程方法进行融合,基于自主研发的V-Dats软件平台和图形化的SysML语言,从发电机组辅助系统的需求、行为、结构和参数4个维度进行建模,完成了系统需求—功能—逻辑—物理的过程分析,得到了系统需求架构、功能架构及物理架构模型,并在系统层级开展了闭环验证和确认。通过总结船舶动力工程总体设计流程的体系顶层框架,提出了基于MBSE的总体正向设计方法,研究成果可有效支撑船舶动力工程总体论证与设计。