Design Analysis Method for Multidisciplinary Complex Product Using Sysml
Total Page:16
File Type:pdf, Size:1020Kb
MATEC Web of Conferences 139, 00014 (2017) DOI: 10.1051/matecconf/201713900014 ICMITE 2017 Design Analysis Method for Multidisciplinary Complex Product using SysML Jihong Liu1,*, Shude Wang1, and Chao Fu1 1 School of Mechanical Engineering and Automation, Beihang University, 100191 Beijing, China Abstract. In the design of multidisciplinary complex products, model-based systems engineering methods are widely used. However, the methodologies only contain only modeling order and simple analysis steps, and lack integrated design analysis methods supporting the whole process. In order to solve the problem, a conceptual design analysis method with integrating modern design methods has been proposed. First, based on the requirement analysis of the quantization matrix, the user’s needs are quantitatively evaluated and translated to system requirements. Then, by the function decomposition of the function knowledge base, the total function is semi-automatically decomposed into the predefined atomic function. The function is matched into predefined structure through the behaviour layer using function-structure mapping based on the interface matching. Finally based on design structure matrix (DSM), the structure reorganization is completed. The process of analysis is implemented with SysML, and illustrated through an aircraft air conditioning system for the system validation. 1 Introduction decomposition and function modeling, function structure mapping and evaluation, and structure reorganization. In the process of complex product design, system The whole process of the analysis method is aimed at engineering is a kind of development methods which providing designers with an effective analysis of ideas covers a wide range of applications across from system and theoretical support to reduce the bad design and requirements analysis, function decomposition to improve design efficiency. physical construction, and so on. The purpose is to The paper is organized as follows: The second part of ensure that the user’s needs are satisfied throughout the the article briefly introduces the relevant theoretical whole life cycle of the system and that the efficiency basis, the third part describes the specific benefits are maximized [1]. With the increase of the implementation process of the method, and the forth part complexity of the product, the document-based system uses the aircraft air conditioning system as an example to engineering is difficult to meet the current R&D verify the effectiveness of the method. The last part is requirements, and the model-based system engineering the article summary. (MBSE) becomes the best choice in the context of integrating the multidisciplinary and multidisciplinary background. The core idea is to model the development 2 Theoretical of all the information related to the system design from the beginning of the system research and development, 2.1 MBSE methodology and as a central system model throughout the product system life cycle. The contribution of MBSE to short the development However, the existing MBSE methodology only cycle and reduce the cost, not only rely on the ability to contains the modeling process of each stage, describe a strong system modeling language, but also experience-based analysis process, and short of rigorous need the support of scientific methodology. From a analysis theory and analysis methods [2]. The existing broad sense of conceptual perspective, MBSE analysis theory is difficult to combine the characteristics methodology is a collection of processes, languages, and of SysML model, and can’t be good for SysML tools that support the full range of product development Expression. It is also difficult to support the whole under "modeled" trends. At present, the mainstream process of model establishment. In this paper, by methodologies include [3]: IBM Harmony-SE, INCOSE combining the conceptual design analysis theory and the object-oriented system engineering method, using the expression characteristics of SysML model, a design "onion" model of the Vitech MBSE methodology, RUP analysis method is proposed to support the conceptual SE methodology developed from the Software design stage of complex product in the multi-disciplinary Development Unified Process Framework (RUP), field with the requirement analysis, function Product system modeling methods based on the complex * Corresponding author: [email protected] © The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/). MATEC Web of Conferences 139, 00014 (2017) DOI: 10.1051/matecconf/201713900014 ICMITE 2017 state analysis. Although the modeling order and the Start analysis rocess are different in different methodologies, they do not include specific analytical methods. User Requirement Standardized 2.2 SysML System requirements requirements description match SysML has the characteristics of object-oriented, library Determine the requirements weight grahical, latform-indeendent, and can describe, Initial system analyse, design and erify the complex systems coering requirements software, hardware and other information, and rovide visual semantics epression for system reuirements, Analyze the relationship behaior, structure and arameter modeling to ensure between the that model-based research and deelopment can cover requirements through the system design to the implementation of the various stages [4]. ombined with the characteristics of Construct the system engineering, SysML has been imroed based on mapping matrix the ML, and model the whole conceptual design hase by expressing the four types of design information Matrix analysis (reuirement, behavior, structure and arameters) of the system through nine graphs. he requirement and System parameter diagram is the new diagrams in SysML. Requirement End 2.3 modern design methods Fig.1. The process of requirement analysis Modern design theory can rovide the theoretical basis for MS analysis. here are many kinds of modern Ste 1 according to the product roperties, the product design methods. technical staffs establish this tye of roduct In the combination of modern design method and standardiation reuirements descrition library, such as MS, ang [2] studied the system engineering method air conditioning refrigeration, price and other content, to and MS model system based on aiomatic design, transport the non-standard reuirement descrition and combined the aiomatic design rocess with MS provided by the customers, into the system reuirements modeling system. ut the core theory of axiomatic described ith the standard technical terms in this design can’t support the whole process of conceptual domain. design. Ste : establishing the maping matri user needs to Yuan and Liu 7] studied the function epand system reuirements, the aplication of uality decomposition using SysML. nd iacomo [8 reosed function of thought (QFD), the user needs to weigh a method to the deelopment of mechatronic systems maped to the system reuirements. At the same time, based on SysML. owever, those methods are not able the descrition of the requirement relation is etended to suort the the whole rocess of design. and the reuirement relation of the system is analysed. The reuirement relationship includes the inclusion, trace, derie, refine, satisfy, and erify, to quantify 3 Multidisciplinary complex product seeral relationshis to determine the system design analysis method reuirements .The standard of quantifying is shown in the Table 1. 3.1 Requirement analysis based on quantization Table 1. The standard of quantifying matrix Relationship Contain Trace Derive Refine Satisfy Verify Reuirements analysis is an important stage in the Weight 1.0 0.9 0.7 0.5 0.3 0.1 process of roduct design. uality unction eloyment Ste , the resulting system requirements for attribute (QFD) which is a widely used design method is used in analysis, the property is defined as the functional the conceptual design hase to ensure that the reuirements describe the system function reuirements reuirements from the customer or market is accurately tye and non-functional reuirements other types of transferred to the product life cycle by analysing the needs, including rice, sie constraints), that is, system quality house each stage of the releant technology and functions and roduct constraints. measures In this aer, through the aplication of thinking, the user needs into a standardied system reuirements descrition, hile the use of analytical 3.2 Function decomposition based on function matrix, analysis and ealuation, in order to get more in knowledge base line with roduct system reuirements. The specific process is shon in Fig1. The function modeling of the product is realied through the process of function decomposition. There are many ways to realie the function decomposition. According to 2 MATEC Web of Conferences 139, 00014 (2017) DOI: 10.1051/matecconf/201713900014 ICMITE 2017 the characteristics of the SysML, this paper proposes the function of the subsystems defined y the input and function decomposition method ased on the function output flow changes of the subsystems. knowledge basis. n this method, the qualitatie tep esigners of different doains decompose processing reasoning (QFR 6] theory is applied. he the function of their su-sstem according to the change type is divided into four types type change following principles First according to the change of numerical change alue space change and deriatie