Journal articles: 'Conceptual Design Synthesis'

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Wang, Shuxin, Longwang Yue, Qunzhi Li, and Jienan Ding. "Conceptual design and dimensional synthesis of “MicroHand”." Mechanism and Machine Theory 43, no. 9 (September 2008): 1186–97. http://dx.doi.org/10.1016/j.mechmachtheory.2007.08.003.

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Montastruc, Ludovic, Ségolène Belletante, Alexandre Pagot, Stéphane Negny, and Ludovic Raynal. "From conceptual design to process design optimization: a review on flowsheet synthesis." Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 74 (2019): 80. http://dx.doi.org/10.2516/ogst/2019048.

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This paper presents the authors’ perspectives on some of the open questions and opportunities in Process Systems Engineering (PSE) focusing on process synthesis. A general overview of process synthesis is given, and the difference between Conceptual Design (CD) and Process Design (PD) is presented using an original ternary diagram. Then, a bibliometric analysis is performed to place major research team activities in the latter. An analysis of ongoing work is conducted and some perspectives are provided based on the analysis. This analysis includes symbolic knowledge representation concepts and inference techniques, i.e., ontology, that is believed to become useful in the future. Future research challenges that process synthesis will have to face, such as biomass transformation, shale production, response to spaceflight demand, modular plant design, and intermittent production of energy, are also discussed.

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Liu, Ze-Lin, Yong Chen, and You-Bai Xie. "A knowledge-based system for multi-disciplinary conceptual design synthesis." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 226, no. 12 (March 1, 2012): 2950–66. http://dx.doi.org/10.1177/0954406212439810.

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Exploring wide multi-disciplinary solution spaces to create conceptual design solutions is a difficult task for human designers due to lack of sufficient multi-disciplinary knowledge. A viable approach would be to develop a computer-aided system to synthesize the wide variety of knowledge for a given design task. However, the existing design synthesis systems are mainly domain-specific, focusing on conceptual design synthesis in a single or few limited disciplines. Therefore, this article introduces the development of a knowledge-based system for multi-disciplinary conceptual design synthesis, including the establishment of a knowledge base for organizing multi-disciplinary principle solutions and a design synthesis algorithm. The implementation of a prototype software is also reported, with the conceptual design of a solar fountain as a demonstrative case. The results of the case study show that the system can automatically and conveniently generate multi-disciplinary conceptual solutions.

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Ceruti, Alessandro, and Pier Marzocca. "Conceptual Approach to Unconventional Airship Design and Synthesis." Journal of Aerospace Engineering 27, no. 6 (November 2014): 04014035. http://dx.doi.org/10.1061/(asce)as.1943-5525.0000344.

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Majumder, Anubhab, and Amaresh Chakrabarti. "A Tool for Supporting Conceptual Design of Multiple State Mechanical Devices." Defence Science Journal 72, no. 2 (May 11, 2022): 217–26. http://dx.doi.org/10.14429/dsj.72.17240.

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Research into conceptual design of mechanical systems has evolved as an area of interest since last few decades. Conceptual design plays a significant role as an early stage of design to produce designs with higher quality by economically exploring a larger solution space. Several attempts have been made by researchers to automate the conceptual design synthesis process using computer support. However, most of that work has been focused on single state design problems. This paper deals with multiple state mechanical design problems and proposes a systematic method for synthesizing a larger solution space. A web-based tool is developed to guide designers through the step-by-step synthesis process by providing automated retrieval of initial solution proposals and modification rules.

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Chen, Yong, Peien Feng, Bin He, Zhonquin Lin, and Youbai Xie. "Automated Conceptual Design of Mechanisms Using Improved Morphological Matrix." Journal of Mechanical Design 128, no. 3 (July 21, 2005): 516–26. http://dx.doi.org/10.1115/1.2180807.

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Conceptual design of mechanisms has attracted a number of research efforts in recent years due to its significance in product development. However, existing approaches for automated conceptual design of mechanisms are either prone to a loss of optimal solutions or inextensible to achieve conceptual design of complex mechanisms. This paper is devoted to developing a comprehensive and extensible methodology for automated conceptual design of mechanisms utilizing a design prototype synthesis methodology. To support automated mechanism synthesis effectively, the traditional morphological matrix is improved as a motional function matrix (MFM). In addition, a mechanism prototype knowledge base is developed to provide systematic knowledge support for conceptual design decision-making. Based on the integrated MFM, an exhaustive mechanism synthesis algorithm is developed to yield as many solutions as possible to desired functions to facilitate the discovery of novel and optimal combinatorial solutions. To curb the possible combinatorial explosion from the exhaustive search, a performance constraint verification approach is proposed to help designers filter out combinatorial solutions violating performance constraints, followed by a satisfaction degree-based approach for evaluating the total performances of combinatorial solutions according to the performances of their subsolutions. An automated mechanism conceptual design prototype system is developed and a design case is presented to illustrate the feasibility and practicality of the proposed methodology.

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Chu, Chia Chun. "The Conceptual Design of Differential Mechanisms." Applied Mechanics and Materials 284-287 (January 2013): 973–78. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.973.

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The purpose of this paper is to present a design approach based on the geometric constraints of joints for synthesizing differential mechanisms with two degrees-of-freedom, including some mechanisms with the same functions but distinct structures. The concept of virtual axes is presented. And, there are five steps in the design process. Step 1 is to decide fundamental entities by the properties of existing mechanisms and the technique of number synthesis, and 10 suitable fundamental entities of differential mechanisms are available. Step 2 is to compose geometric constraints, and 14 items are obtained. Step 3 is to compose links, and 15 items are derived. Step 4 is to assign fixed constraints for inputs or outputs, and 15 results are found. The final step is to particularize the obtained events by the properties of existing mechanisms and the structures of fundamental entities. As a result, 8 feasible results for differential mechanisms with two degrees-of-freedom and two basic loops are obtained in which 2 are existing designs and the other 6 are novel.

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Micheli, Pietro G., Sabeen Bhatti, Sarah Wilner, and Michael Beverland. "Doing Design Thinking: Conceptual Review, Synthesis and Research Agenda." Academy of Management Proceedings 2018, no. 1 (August 2018): 16071. http://dx.doi.org/10.5465/ambpp.2018.16071abstract.

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Pérez, Roberto, Joaquim Ciurana, Carles Riba, Arturo Molina, David Romero, Luis W. Hernández, and Ana M. Quesada. "Concurrent Conceptual Evaluation of Tolerances’ Synthesis in Mechanical Design." Concurrent Engineering 19, no. 2 (June 2011): 175–86. http://dx.doi.org/10.1177/1063293x11406147.

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Micheli, Pietro, Sarah J. S. Wilner, Sabeen Hussain Bhatti, Matteo Mura, and Michael B. Beverland. "Doing Design Thinking: Conceptual Review, Synthesis, and Research Agenda." Journal of Product Innovation Management 36, no. 2 (September 8, 2018): 124–48. http://dx.doi.org/10.1111/jpim.12466.

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Smith, H., D. Sziroczák, GE Abbe, and P. Okonkwo. "The GENUS aircraft conceptual design environment." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 8 (July 16, 2018): 2932–47. http://dx.doi.org/10.1177/0954410018788922.

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The design of aircraft has evolved over time from the classical design approach to the more modern computer-based design method utilizing multivariate design optimization. In recent years, aircraft concepts and configurations have become more diverse and complex thus pushing many synthesis packages beyond their capability. Furthermore, many examples of aircraft design software focus on the analysis of one particular concept thus requiring separate packages for each concept. This can lead to complications in comparing concepts and configurations as differences in performance may originate from different prediction toolsets being used. This paper presents the GENUS Aircraft Design Framework developed by Cranfield University’s Aircraft Design Group to address these issues. The paper reviews available aircraft design methodologies and describes the challenges faced in their development and application. Following this, the GENUS aircraft design environment is introduced, along with the theoretical background and practical reasoning behind the program architecture. Particular attention is given to the programming, choice of methodology, and optimization techniques involved. Subsequently, some applications of the developed methodology, implemented in the framework are presented to illustrate the diversity of the approach. Three special classes of aircraft design concept are presented briefly.

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Djojodihardjo, Harijono. "Overview of green quad bubble business jet aerodynamic configuration design." Aircraft Engineering and Aerospace Technology 90, no. 3 (April 9, 2018): 566–82. http://dx.doi.org/10.1108/aeat-12-2016-0241.

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Purpose The purpose of this paper is to explore the possibilities of introducing a number of visionary and pioneering ideas and upcoming enabling technologies for a conceptual and aerodynamic design of green business jet aircraft to meet various requirements within Green and N + 2 Aircraft framework, and at the same time, to meet the requirements of air transportation demand, economic growth and environmental conservation. Design/methodology/approach A synthesis of various aircraft design methodologies has been carried out through iterative optimization to arrive at the conceptually designed aircraft with novel concept with optimum performance within the subsonic flight regimes. Major ideas derived from D8 and other novel concepts are appropriately applied in the work, which starts with fuel efficient motivation, and followed by wing aerodynamics and other critical factors related to the design requirements and objectives. Findings Through a meticulous effort following the synthesized design methodologies in the conceptual design phase, a conceptual design of a quad-bubble business jets with a set of specifications that meet the green and N + 2 aircraft technology requirements and exhibit promising performances is proposed and assessed within recent aircraft technology development. Research limitations/implications The research work is limited to conceptual design and analytical work which should be followed by further iterative steps incorporating experiments and detailed structural and aerodynamic computations. Practical implications The conceptual design proposed can be utilized as a baseline for further practical step in an aircraft development project. Social implications The conceptual design proposed could be utilized for business and economic study for future air transportation system. Originality/value The work is original, incorporating review of state-of-the-art technology, environmental requirements and a synthesis of a novel product.

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Li, Xiang, Zhi-Nan Zhang, Ze-Lin Liu, and You-Bai Xie. "A novel semi-heuristic planning approach for automated conceptual design synthesis." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, no. 10 (January 9, 2013): 2291–305. http://dx.doi.org/10.1177/0954406212473037.

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Automated conceptual design often shows significant promise for generating conceptual solutions automatically through searching and synthesizing known principle solutions for a desired function. However, existing automated conceptual design systems lack an efficient heuristic search strategy and a knowledge-based planning mechanism, which lead to less chance of finding promising principle solutions within a limited time. This article proposes a novel semi-heuristic planning approach for automated conceptual design which comprises two successive steps, i.e. DESIGN PLAN and DESIGN COMBINATION. During the stage of DESIGN PLAN, the planning-graph technique is employed to extract a design plan from a planning graph, which is composed of various principle solution clusters. Under the guidance of the design plan, in the second stage, DESIGN COMBINATION combines compatible principle solutions from the principle solution clusters in the design plan until finding promising conceptual solutions. A prototype system and design case illustrate that the proposed semi-heuristic planning approach can successfully achieve an automated conceptual design synthesis.

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Yang, Yan Hua, Zu Ping Zhu, and Li Gang Yao. "Design Modeling and Solving Implementation for Product Conceptual Design in Quality Function Deployment." Advanced Materials Research 279 (July 2011): 394–99. http://dx.doi.org/10.4028/www.scientific.net/amr.279.394.

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Considering the process of research in conceptual design, a framework model of Function-Behaviour-structure was put forward, and QFD was an effective tool for function conversion. Then a mixed solving technology combining case-based reasoning and behaviour solving reasoning was discussed to achieve design mapping. Finally, an automatic synthesis mapping system was developed and the conceptual design of clam collector was given as an example. Application results demonstrated that the proposed method was feasible.

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Rana, L., and B. Chudoba. "Demonstration of a prototype design synthesis capability for space access vehicle design." Aeronautical Journal 124, no. 1281 (June 30, 2020): 1761–88. http://dx.doi.org/10.1017/aer.2020.55.

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ABSTRACTThe early conceptual design (CD) phase of space access vehicles (SAVs) is the most abstract, innovative and technologically challenging phase of the entire aerospace design life cycle. Although the design decision-making during this phase influences around 80 percent of the overall life cycle cost, it is the most abstract and thus least understood phase of the entire design life cycle. The history of SAV design provides numerous examples of project failures that could have been avoided if the decision-maker had had the capability to forecast the potential risks and threats correctly ahead of time during the conceptual design phase. The present study addresses this crucial phase and demonstrates a best-practice synthesis methodology prototype to advance the current state of the art of CD as applied to SAV design. Developed by the Aerospace Vehicle Design (AVD) Laboratory at the University of Texas at Arlington (UTA), the Aerospace Vehicle Design Synthesis process and software (AVDS) is a prototype solution for a flight vehicle configuration–flexible (generic) design synthesis capability that can be applied to the primary categories of SAVs. This study focusses on introducing AVDS, followed by the demonstration and verification of the system’s capability through a sizing case study based on the data-rich Boeing X-20 Dyna-Soar spaceplane.

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Chen, Bin, and You-Bai Xie. "A complex-number-domain-based conceptual design synthesis for multidisciplinary products." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 231, no. 7 (October 3, 2016): 1292–307. http://dx.doi.org/10.1177/0954406216668207.

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With the increase of the customer demands for the products, multidisciplinary products are gradually becoming more competitive than the traditional products. Considering conceptual design synthesis is the core phase of the product design and its result is the starting point of the next detail design works, if the rich resources in multiple disciplinary domains can be fully used during this phase, the efficiency of multidisciplinary product design will be largely promoted. Therefore, we proposed a novel conceptual design synthesis system for multidisciplinary products, which consists of three parts, i.e. basic framework, complex-number-domain-based mathematical model, and achieving approach. In the framework, three groups of concepts were defined and the conceptual design synthesis was concluded into three steps. The model can completely describe and modularize the function units which are the basic components of a design scheme. Based on the model, the achieving approach can automatically generate stable objective function unit chains which can directly construct the design scheme. Finally, the design of a multifunctional agricultural hydroelectric power system was taken as an illustration to prove the practicability of this proposed system.

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Redfield, R. C., and S. Krishnan. "Dynamic System Synthesis With a Bond Graph Approach: Part I—Synthesis of One-Port Impedances." Journal of Dynamic Systems, Measurement, and Control 115, no. 3 (September 1, 1993): 357–63. http://dx.doi.org/10.1115/1.2899110.

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This is the first part of a two-part paper developing a procedure for impedance synthesis and dynamic system conceptual design using a bond graph approach. The first part examines impedance synthesis with bond graphs and develops some useful properties of impedance related to bond graph structure. The second part of the paper uses the impedance synthesis approach as a tool in conceptual design for generating dynamic system solutions meeting frequency domain input-output specifications. In Part I, impedance and transfer functions are directly formulated from bond graphs. An invertible procedure is developed in order to allow for synthesis. Frequency domain properties of bond graphs are developed that will aid in impedance synthesis and the synthesis of bond graph structures from impedance specifications is formulated with a view toward conceptual design. The synthesis is not unique, a given impedance can be synthesized into multiple bond graph structures depending on its complexity. The work presented focuses on the synthesis of passive impedances but may be generalized for active systems.

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Li, Meng, Tian Huang, Dawei Zhang, Xueman Zhao, S. Jack Hu, and Derek G. Chetwynd. "Conceptual Design and Dimensional Synthesis of a Reconfigurable Hybrid Robot." Journal of Manufacturing Science and Engineering 127, no. 3 (June 12, 2004): 647–53. http://dx.doi.org/10.1115/1.1947208.

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This paper deals with the conceptual design of a novel four-degree-of-freedom (dof) modularized robot which is composed of a 2-dof parallel mechanism plus a 2-dof rotating head attached to the moving platform. Patented with the name Bicept, the robot is the two-dimensional version of the Tricept robot and is designed as a reconfigurable module that can readily be integrated with 1-dof feed mechanism or a fixed base in order to form a set of reconfigurable robots with parallel-serial architecture. The dimensional synthesis of the 2-dof parallel mechanism as a component of the Bicept robot is also carried out by solving a one-dimensional nonlinear equation associated with the strut-length constraint. The dimensional parameters corresponding to various width-height ratios of the work space are obtained via examples.

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Chen, Bin. "Conceptual design synthesis based on series-parallel functional unit structure." Journal of Engineering Design 29, no. 3 (March 4, 2018): 87–130. http://dx.doi.org/10.1080/09544828.2018.1448057.

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Hartmann, C., R. Chenouard, E. Mermoz, and A. Bernard. "A framework for automatic architectural synthesis in conceptual design phase." Journal of Engineering Design 29, no. 11 (October 16, 2018): 665–89. http://dx.doi.org/10.1080/09544828.2018.1532494.

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Kusiak, A., and E. Szczerbicki. "A Formal Approach to Specifications in Conceptual Design." Journal of Mechanical Design 114, no. 4 (December 1, 1992): 659–66. http://dx.doi.org/10.1115/1.2917057.

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In this paper, a methodology for the specification stage in conceptual design is presented. The specification stage provides requirements and transforms them into functions of the designed object. It occurs at the highest level of abstraction and it must provide enough information for the synthesis process where functions are transformed into design components that are further synthesized into the designed object. The proposed approach includes the following issues: specification of requirements, specification of functions, incorporation of logic into functional and requirement trees, representation of requirements-functions interaction, and optimization in the functional space. The methodology presented is illustrated with examples. Key words: design requirements, design specifications, conceptual design, design process, artificial intelligence, formal method

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Chang, Jianhui, Zhenghui Zhao, Chuanmin Jia, Shiqi Wang, Lingbo Yang, Qi Mao, Jian Zhang, and Siwei Ma. "Conceptual Compression via Deep Structure and Texture Synthesis." IEEE Transactions on Image Processing 31 (2022): 2809–23. http://dx.doi.org/10.1109/tip.2022.3159477.

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Qi, Jin, Jie Hu, and Ying-Hong Peng. "An integrated principle solution synthesis method in multi-disciplinary mechatronic product conceptual design." Concurrent Engineering 26, no. 4 (September 21, 2018): 341–54. http://dx.doi.org/10.1177/1063293x18799488.

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Synthesizing suitable principle solutions together to form the design solution is a universal method in conceptual design. For the modern mechatronic product, the conceptual design is often multi-disciplinary, which would be extremely time consuming and labour-intensive for designers to synthesize multi-disciplinary principle solutions together. Taking advantage of functional knowledge and structural knowledge of principle solution, this article proposes an integrated principle solution synthesis method which not only achieves the automated synthesis of multi-disciplinary principle solutions but also solves the undesired physical conflicts among principle solutions to be synthesized. In integrated principle solution synthesis, a synthesis agent is developed to chain the functional flows of principle solutions to form the combinatorial principle solution set, and synthesis agent selects the combinatorial principle solution with highest availability value as the recommended combinatorial principle solution. Then extensic theory is employed to deal with the partial design conflicts hidden in recommended combinatorial principle solution by extending and transforming the conflict functional structures. A case study on the emergency cutting off device design is given to prove the industrial applicability of integrated principle solution synthesis, which indicates that compared with traditional synthesis method, integrated principle solution synthesis can not only get multi-disciplinary design result of emergency cutting off device but also further resolve the design conflict (i.e. vibration impact) to optimize the functional structure of emergency cutting off device.

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DENG, Y. M. "Function and behavior representation in conceptual mechanical design." Artificial Intelligence for Engineering Design, Analysis and Manufacturing 16, no. 5 (November 2002): 343–62. http://dx.doi.org/10.1017/s0890060402165024.

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Conceptual design seeks to deliver design concepts that implement desired functions. Function and behavior are two dominant terms used in the research of this design phase. However, there are still some fundamental ambiguities and confusions over their representation, which have greatly hindered the interchange of research ideas and the development of design synthesis strategies. For conceptual design of mechanical products specifically, this paper attempts to clarify these ambiguities. It classifies function as purpose function and action function and relates them to the different levels of design hierarchy and abstraction. It distinguishes between semantic and syntactic representations of function and behavior and summarizes basic representation schemes. It also proposes an input–output action transformation scheme for semantic function representation and an input–output flow of action scheme for semantic behavior representation. Based on these discoveries, a refined framework is proposed for conceptual mechanical product design, where a function–decomposition–mapping process is elaborated to demonstrate the necessities and usefulness of the presented work.

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POTTER, S., M. J. DARLINGTON, S. J. CULLEY, and P. K. CHAWDHRY. "Design synthesis knowledge and inductive machine learning." Artificial Intelligence for Engineering Design, Analysis and Manufacturing 15, no. 3 (June 2001): 233–49. http://dx.doi.org/10.1017/s0890060401153047.

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A crucial early stage in the engineering design process is the conceptual design phase, during which an initial solution design is generated. The quality of this initial design has a great bearing on the quality and success of the produced artefact. Typically, the knowledge required to perform this task is only acquired through many years of experience, and so is often at a premium. This has led to a number of attempts to automate this phase using intelligent computer systems. However, the knowledge of how to generate designs has proved difficult to acquire directly from human experts, and as a result, is often unsatisfactory in these systems. The application of inductive machine learning techniques to the acquisition of this sort of knowledge has been advocated as one approach to overcoming the difficulties surrounding its capture. Rather than acquiring the knowledge from human experts, the knowledge would be inferred automatically from a set of examples of the design process. This paper describes the authors' investigations into the general viability of this approach in the context of one particular conceptual design task, that of the design of fluid power circuits. The analysis of a series of experiments highlights a number of issues that would seem to arise regardless of the working domain or particular machine learning algorithm used. These issues, presented and discussed here, cast serious doubts upon the practicality of such an approach to knowledge acquisition, given the current state of the art.

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Al-Ahmed, S., and J. P. Fielding. "Vulnerability prediction method for use in aircraft conceptual design." Aeronautical Journal 103, no. 1024 (June 1999): 309–15. http://dx.doi.org/10.1017/s0001924000064903.

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Abstract A methodology has been developed to integrate the vulnerability discipline into the conceptual/preliminary design process of combat aircraft. An interactive and programmable solid modelling Computer Aided Design (CAD) system is used to generate a CAD solid model of the aircraft’s critical components. The aircraft’s components’ sizes and shapes are pre-defined by a conceptual/preliminary design synthesis computer model. A systematic Child-Parent assembly process is used to model the aircraft vulnerability, by defining the criticality degree of each component in the aircraft assembly. Solid Modelling CAD techniques have been modified to develop techniques to perform the two main standard vulnerability assessments, namely the shotline and vulnerable area methods.

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Darbinyan, Hrayr. "Formalization of Reconfigurable Mechanisms in Task Based Conceptual Design Method." Key Engineering Materials 572 (September 2013): 111–14. http://dx.doi.org/10.4028/www.scientific.net/kem.572.111.

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Recent studies [1, 2] were devoted to author's efforts in formalization of conceptual design process based on vast data in mechanical design accumulated over years. The suggested novel method of conceptual design is implying direct dependence of function and a mechanism intending to implement the challenged function, considering a wider interpretation for both categories of mechanism and function. Main aspects of this method relate to formalization of both mechanism and function, formatting of design pages for tracking the concept design process, formalization of synthesis and analyze tools and formation of design models serving different design targets. Effectiveness of those formalization tasks is based on development and usage of specific graph and matrix based mathematical engine, enabling compact presentation of various aspects of conceptual design method. The current study is aiming to disclose the specific conditions of formalization for reconfigurable as categories widely used in mechanism synthesis and analyzes. Formalization of reconfigurable mechanisms will categories is contribute a lot in effectiveness of organization of concept design. An example from design experience is considered to confirm the validity of suggested formalization approach for the case of reconfigurable mechanisms.

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Chen, Bin, and You-Bai Xie. "A function unit integrating approach for the conceptual design synthesis in the distributed resource environment." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 5 (February 1, 2017): 759–74. http://dx.doi.org/10.1177/0954406217692008.

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With the help of the well-developed Internet technologies, designers can obtain numerous resources distributed all over the world. These resources actually construct the distributed resource environment. If this environment can be fully considered and applied during the key and starting phase of the product design, the conceptual design synthesis, the design efficiency will be largely promoted and the design product will have better quality, innovation, and competition. Therefore, a function unit integrating approach was proposed for the conceptual design synthesis in the distributed resource environment. This approach is based on the integration of function units which represent the resources in the distributed resource environment. With the proposed computer algorithm, these function units can be firstly connected up into appropriate function unit chains and, then, improved into the final function unit set as the result of the conceptual design synthesis. Based on this approach, a computer program called function unit integrating system was established. And finally, the design process of a friction testing machine was completed by function unit integrating system as an illustrative case.

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Reding, Kathleen M., and Marion H. Wijnberg. "Chronic Stress: A Conceptual Perspective." Families in Society: The Journal of Contemporary Social Services 82, no. 4 (August 2001): 345–54. http://dx.doi.org/10.1606/1044-3894.187.

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The case is made for understanding and applying in social work practice current conceptions of chronic stress. Citing literature from the social sciences, the authors develop and describe a comprehensive model of chronic stress, focusing on single mothers that are experiencing economic poverty. The utility of the model lies in its synthesis of concepts that can be used in direct practice, policy development, and program design.

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Pal, Ujjwal, Ying-Chieh Liu, and Amaresh Chakrabarti. "Evaluating FuncSION: A software for automated synthesis of design solutions for stimulating ideation during mechanical conceptual design." Artificial Intelligence for Engineering Design, Analysis and Manufacturing 28, no. 3 (July 22, 2014): 209–26. http://dx.doi.org/10.1017/s0890060414000183.

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AbstractThe goal of the work reported in this paper is to use automated, combinatorial synthesis to generate alternative solutions to be used as stimuli by designers for ideation. FuncSION, a computational synthesis tool that can automatically synthesize solution concepts for mechanical devices by combining building blocks from a library, is used for this purpose. The objectives of FuncSION are to help generate a variety of functional requirements for a given problem and a variety of concepts to fulfill these functions. A distinctive feature of FuncSION is its focus on automated generation of spatial configurations, an aspect rarely addressed by other computational synthesis programs. This paper provides an overview of FuncSION in terms of representation of design problems, representation of building blocks, and rules with which building blocks are combined to generate concepts at three levels of abstraction: topological, spatial, and physical. The paper then provides a detailed account of evaluating FuncSION for its effectiveness in providing stimuli for enhanced ideation.

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Bardenhagen, Andreas, and Dmitry Rakov. "ADVANCED MORPHOLOGICAL APPROACH IN AEROSPACE DESIGN DURING CONCEPTUAL STAGE." Facta Universitatis, Series: Mechanical Engineering 17, no. 3 (November 29, 2019): 321. http://dx.doi.org/10.22190/fume180110005b.

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This paper presents an advanced morphological approach supporting designers and developers in their search for as well as synthesis and analysis of new engineering solutions during the conceptual design stage. The proposed method is based on the cluster analysis and the set theory, the set of rules and engineering implementations maximizing the gain of the products potential. The number of possible combinations using the standard morphological technology is extremely large. We present a mathematical framework that handles this problem. The method was evaluated with case studies of new engineering solutions in aerospace, ecology and adaptive soundproofing system. The case studies verified the significant potential of the proposed approach in comparison with the methods presently in use.

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Martinec, Tomislav, Stanko Škec, Marija Majda Perišić, and Mario Štorga. "Revisiting Problem-Solution Co-Evolution in the Context of Team Conceptual Design Activity." Applied Sciences 10, no. 18 (September 10, 2020): 6303. http://dx.doi.org/10.3390/app10186303.

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The conventional prescriptive and descriptive models of design typically decompose the overall design process into elementary processes, such as analysis, synthesis, and evaluation. This study revisits some of the assumptions established by these models and investigates whether they can also be applied for modelling of problem-solution co-evolution patterns that appear during team conceptual design activities. The first set of assumptions concerns the relationship between performing analysis, synthesis, and evaluation and exploring the problem and solution space. The second set concerns the dominant sequences of analysis, synthesis, and evaluation, whereas the third set concerns the nature of transitions between the problem and solution space. The assumptions were empirically tested as part of a protocol analysis study of team ideation and concept review activities. Besides revealing inconsistencies in how analysis, synthesis, and evaluation are defined and interpreted across the literature, the study demonstrates co-evolution patterns, which cannot be described by the conventional models. It highlights the important role of analysis-synthesis cycles during both divergent and convergent activities, which is co-evolution and refinement, respectively. The findings are summarised in the form of a model of the increase in the number of new problem and solution entities as the conceptual design phase progresses, with implications for both design research and design education.

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Chen, Zheng Shui, Yi Min Deng, Shan Li, and Yuan Wen Yu. "An FTPBM Model for Conceptual Design of Mechanical Execution System." Applied Mechanics and Materials 494-495 (February 2014): 482–85. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.482.

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Mechanical execution system is an important part of mechanical system that contributes to the delivery of system function. There is currently no conceptual design model that is specifically for the conceptual design of mechanical execution system. Based on the FBS (Function-Behavior-Structure) model, this paper investigates the characteristics of the conceptual design process of mechanical execution system, and subsequently proposed an FTPBM (Function-Technology-Process action-Motion behavior-Mechanism) model for its conceptual design. The model includes a functional prototype and six steps of design procedure as well as a number of design synthesis strategies and methods. A design case of press machine is also studied, which demonstrates the proposed model to be not only practicable, but also improve the designers innovation capability.

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Chew, M., and P. Kumar. "Conceptual Design of Deployable Space Structures from the Viewpoint of Symmetry." International Journal of Space Structures 8, no. 1-2 (April 1993): 17–27. http://dx.doi.org/10.1177/0266351193008001-203.

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The concept of symmetry is applied to the design of some existing as well as some new deployable space structures. Through the use of axis or plane symmetry, including anti-symmetry, a bay of a deployable structure may be reduced to an equivalent simple kinematic linkage. This axis of symmetry may be in the direction of deployment of the structure so that by providing a fictitious sliding joint along this axis, the problem of the design and analysis of such deployable structures can be simplified to the study of a plane or a face of the given structure. Such axis or plane of symmetry can also be used for the synthesis of new concepts. As an aid to synthesis, platonic solids can also be used for determining the orientation of these symmetric planes. Several examples are considered. A brief discussion on structural symmetry observed in graphs and dual graphs of some deployable structures will also be presented.

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Redfield, R. C. "Dynamic System Synthesis With a Bond Graph Approach: Part II—Conceptual Design of an Inertial Velocity Indicator." Journal of Dynamic Systems, Measurement, and Control 115, no. 3 (September 1, 1993): 364–69. http://dx.doi.org/10.1115/1.2899111.

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This work develops the conceptual design of an inertial velocity sensor drawing upon the impedance synthesis method in Part I of this paper. Specifications are frequency based impedances and resulting designs are configurations of dynamic energy storing and dissipation elements. The design procedure can be extended to a class of systems design problems where frequency response performance is of primary importance. A key to this work is that the method designs systems from scratch; initial configurations are unknown. As a theme example to demonstrate the utility of the method for conceptual design, constrained and unconstrained inertial velocity sensors are configured based on input-output performance requirements. Such sensors find application in many motion control problems including mechanism and manipulator control, and vibration isolation control. The design methodology generates a number of different sensors that can measure absolute velocity for some or all ranges of frequency.

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Abdullah, M. Y., A. S. A. Shukor, R. Mahbub, and M. F. Mohammad. "Conceptual Framework for IBS Machinery Optimization." IOP Conference Series: Earth and Environmental Science 1067, no. 1 (October 1, 2022): 012060. http://dx.doi.org/10.1088/1755-1315/1067/1/012060.

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Abstract This paper aims to examine variable for the Optimization Industrialise Building System Machinery in Malaysia. The study to address higher cost in IBS Machinery when adopt with technology. Objective for this study to identify theory use in the Industrialise Building System (IBS) Machinery in Malaysia. The study fully using Literature Review on the theory of design in Machinery and also IBS product. From underlaying theories, defined variables that used in Basic Framework must be synthesis process to get finding or result in this research. The finding of the Conceptual Framework variables will be better insight for optimization when doing design on Machinery and IBS product.

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Chakrabarti, Amaresh, and Thomas P. Bligh. "An approach to functional synthesis of solutions in mechanical conceptual design. Part II: Kind synthesis." Research in Engineering Design 8, no. 1 (March 1996): 52–62. http://dx.doi.org/10.1007/bf01616556.

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Pimentel, Jean, Ákos Orosz, Kathleen B. Aviso, Raymond R. Tan, and Ferenc Friedler. "Conceptual Design of a Negative Emissions Polygeneration Plant for Multiperiod Operations Using P-Graph." Processes 9, no. 2 (January 27, 2021): 233. http://dx.doi.org/10.3390/pr9020233.

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Reduction of CO2 emissions from industrial facilities is of utmost importance for sustainable development. Novel process systems with the capability to remove CO2 will be useful for carbon management in the future. It is well-known that major determinants of performance in process systems are established during the design stage. Thus, it is important to employ a systematic tool for process synthesis. This work approaches the design of polygeneration plants with negative emission technologies (NETs) by means of the graph-theoretic approach known as the P-graph framework. As a case study, a polygeneration plant is synthesized for multiperiod operations. Optimal and alternative near-optimal designs in terms of profit are identified, and the influence of network structure on CO2 emissions is assessed for five scenarios. The integration of NETs is considered during synthesis to further reduce carbon footprint. For the scenario without constraint on CO2 emissions, 200 structures with profit differences up to 1.5% compared to the optimal design were generated. The best structures and some alternative designs are evaluated and compared for each case. Alternative solutions prove to have additional practical features that can make them more desirable than the nominal optimum, thus demonstrating the benefits of the analysis of near-optimal solutions in process design.

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Chew, M., S. N. T. Shen, and G. F. Issa. "Kinematic Structural Synthesis of Mechanisms Using Knowledge-Based Systems." Journal of Mechanical Design 117, no. 1 (March 1, 1995): 96–103. http://dx.doi.org/10.1115/1.2826123.

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This paper presents a knowledge-based systems approach to the automation of the conceptual synthesis of mechanisms. The system utilizes a procedure for synthesizing design alternatives based on the principle of separation of structure from function. This principle in turn resolves the problem of knowledge representation of design alternatives through the use of graph structures which are then evaluated using a set of heuristic rules. The expert system presented in this paper has been implemented and tested for the conceptual synthesis of variable-stroke engines and robot-hands kinematic structures. The system has shown the capability of producing numerous design alternatives for these two applications, and has provided consistent results based on the evaluation rules. It has also provided the designer with immediate feedback on the viability of any given design alternative and the reasons behind that decision.

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Shao, Yixin, Zhongxia Xiang, Haitao Liu, and Lili Li. "Conceptual design and dimensional synthesis of cam-linkage mechanisms for gait rehabilitation." Mechanism and Machine Theory 104 (October 2016): 31–42. http://dx.doi.org/10.1016/j.mechmachtheory.2016.05.018.

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Carlson, Max B., Kayen K. Yau, Robert E. Simpson, and Michael P. Short. "Conceptual Design of a Pick-and-Place 3D Nanoprinter for Materials Synthesis." 3D Printing and Additive Manufacturing 2, no. 3 (September 2015): 123–30. http://dx.doi.org/10.1089/3dp.2015.0023.

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Zhang, W. Y., S. B. Tor, and G. A. Britton. "A Prototype Knowledge-Based System for Conceptual Synthesis of the Design Process." International Journal of Advanced Manufacturing Technology 17, no. 8 (April 20, 2001): 549–57. http://dx.doi.org/10.1007/s001700170137.

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Krupa, G. P. "Application of Agile Model-Based Systems Engineering in aircraft conceptual design." Aeronautical Journal 123, no. 1268 (August 1, 2019): 1561–601. http://dx.doi.org/10.1017/aer.2019.53.

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ABSTRACTOne of the challenges of modern engineering design is the amount of data that designers must keep track while performing system analysis and synthesis. This task is particularly important in the design process of complex systems such as novel aerospace systems where Modeling and Simulation play an essential role. The Agile philosophy stems from the field of Software Engineering and describes an approach to development in which requirements and solutions gradually develop through collaboration between self-organising cross-functional teams and end users. Agile Model-Based System Engineering (AMBSE) is the application of the Agile philosophy to Model-Based System Engineering. In this paper, AMBSE is accomplished through the application of the Object-Oriented System Engineering Method (OOSEM). OOSEM employs a top-down scenario-driven process that adopts System Modeling Language (SysML) and leverages the object-oriented paradigm to support the analysis, specification, design, and verification of systems. AMBSE assisted by mathematical modelling and safety assessment techniques is applied to the first design iterations of the main aircraft systems, allowing a comprehensive design exploration. The flight control system was chosen to illustrate the procedure in detail, emphasising the synthesis of a six-degrees-of-freedom model augmented by dynamic inversion control for a hypothetical supersonic transport aircraft satisfying class II MIL-F-8785C handling qualities. It is concluded that AMBSE presents promising properties to support future aircraft development within the current regulatory framework for aircraft design, while enabling a smooth transition from conceptual to preliminary design.

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Ma, Jin, Jie Hu, Jin-Feng Feng, Jin Qi, and Ying-Hong Peng. "Constrained FBS knowledge cell model, representation, and applications for conceptual design." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 11 (May 22, 2015): 1773–86. http://dx.doi.org/10.1177/0954406215585366.

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Conceptual design plays a pivotal role in generating creative design solutions and, in most cases, reuse of existing design knowledge is necessary. However, lack of a consistent design knowledge representation model and neglect of an integrated approach to support various formats of design knowledge reuse constrain conceptual design from transforming design requirements into practical promising design solutions. In order to solve these problems, this paper presents a constrained function-behavior-structure knowledge cell (CFBS) model to provide conceptual design process with a consistent knowledge representation model. CFBS-based integrated approach for design knowledge reuse is proposed, which includes three-level CFBS retrieval process to obtain most relevant CFBS expressed in various types, three-stage design synthesis process to produce suggested design solutions, and evaluation process to select the most feasible design solutions. The effectiveness of the proposed design process was illustrated with conceptual design of the micro-feed drive module of insulin pump based on the CFBS library.

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Chudoba, B., and W. Heinze. "Evolution of generic flight vehicle design synthesis." Aeronautical Journal 114, no. 1159 (September 2010): 549–67. http://dx.doi.org/10.1017/s0001924000004036.

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AbstractWhen defining a new product like an aircraft, space access vehicle or space mission, the Advanced Projects Group evaluates the available design space and compares it with the design space required to accomplish the specified mission. As with any product development process, the general life-cycle characteristics are established first during the conceptual design (CD) phase, clearly before a design proposal can be released to the follow-on design phases such as preliminary design (PD), detail design (DD), flight test (FT), and finally operation and disposal. As a rule of thumb, it can be assumed that around 80% of the flight vehicle configuration and mission tandem are determined during the CD phase alone, which is the key phase where the initial brainstorming has to take place. Clearly, it is the responsibility of the CD team to simulate the entire life-cycle of the project from ‘cradle to grave’ where the focus is on correctness rather accuracy in order to identify the design space and offer an overall proof of design convergence. Currently, the important primary aerospace vehicle and mission design decisions at CD level are still made using extremely simple analysis and heuristics. A reason for this scenario is the difficulty in synthesising the range of individual design disciplines for both, classical and novel aerospace vehicle conceptual designs, in more than anad hocfashion. Although the CD segment is seen as the most important step in the product development phase due to its pre-defining function, it is the least well understood part of the entire product evolution process due to its level of abstraction. This paper presents the roadmap towards the next generation of aerospace life-cycle synthesis systems, a software and management process capable to immediately calculate cost and time implications while simultaneously linking design, manufacturing, testing, and operation. A historical review of how design has been accomplished until today is presented. The design approaches are categorised and the characteristics of today’s state-of-the-art design synthesis systems are discussed. A specification for the new class of intelligent generic design synthesis systems is presented capable of satisfying the demands imposed by the new breed of high-performance aircraft, space access vehicles, space missions, and others. Finally, the development status of the next generation aerospace vehicle design synthesis (AVDS-PrADO) simulation-based acquisition environment is presented.

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Bondar, Ihor. "Conceptual and Analytical Approaches to Design Activity Modeling." Demiurge: Ideas, Technologies, Perspectives of Design 5, no. 2 (October 31, 2022): 346–57. http://dx.doi.org/10.31866/2617-7951.5.2.2022.266929.

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Purpose of the article. The article examines conceptual and analytical approaches to the modeling of design activities in the context of training future design specialists in cultural and artistic higher education institutions on the example of the Kyiv National University of Culture and Arts. Research methodology involves the usage of general scientific and special methods, including analysis, synthesis, description, comparison, generalization. Scientific novelty: conceptual approaches were analyzed and comprehensively considered during the preparation of the future design specialists to carry out design activities (on the example of Kyiv National University of Culture and Arts): geometric; organic; synergistic; metaphorical; energy information; technological; ethical; socionic; rationalist; situational; emotional; program. Conclusions. It was determined that modeling in the context of training future design specialists for the development of a professional career is based on the demands of society for the preparation of a complete personality with a conscious professional orientation, the originality of the individual style of design creativity. It was found that the training of future design specialists to carry out design activities should be based on the internal logic of education. The model of training future design specialists to carry out design activities is the main reference point in choosing the content of education and its nature, the applied methods and techniques of learning, therefore, in order for this model to become a reliable reference point for the effective organization of the educational process, it should include the specifics of the personality model future designer. The design-activity model of the future design specialist allows to determine the type and amount of necessary knowledge, the type and level of competence and skills that will enable him to successfully carry out this activity. It has been established that the following conceptual approaches will be used to prepare future design specialists for the implementation of design activities (on the example of the Kyiv National University of Culture and Arts): geometric; organic; synergistic; metaphorical; energy information; technological; ethical; socionic; rationalist; situational; emotional; program. It has been proven that the basis of the analytical approach to the modeling of design activities is the generation of ideas for fundamentally new projects in various directions of design and the formation of modern ideas about the main laws and achievements in the construction, modeling, constructive and artistic decoration of complex design objects and designs with the application skills of analytical, experimental and associative creativity. It was found that an important role in the professional training of future design specialists is played by the introduction and use of innovative technologies and training methods.

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Saulescu, Radu, Mircea Neagoe, and Codruta Jaliu. "Conceptual Synthesis of Speed Increasers for Wind Turbine Conversion Systems." Energies 11, no. 9 (August 27, 2018): 2257. http://dx.doi.org/10.3390/en11092257.

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Most wind turbines (WT) are of the single-rotor type, which means they are simple, reliable and durable, but unlikely to convert more than 40% of the available wind energy. Different solutions are proposed to minimize WT energy loss and improve performance, such as the use of speed increasers, counter-rotating wind rotors or counter-rotating electric generators. Downsizing the design, saving weight and reducing the cost of WT conversion systems, while increasing their efficiency, have posed constant challenges to WT designers. Nevertheless, very little research in the field is concerned with, and partially recommends, the design of conversion systems. Therefore, the aim of this paper is to propose a specific algorithm for the conceptual synthesis of speed increasers integrated in WT conversion systems, starting with an inventory of all combinations of the main components of a conversion system that prove compatible for efficient functioning. The algorithm is structured in two sections: the first one includes a four-step approach to WT system design, while the second one follows a three-step procedure for identifying the speed increaser concept. Twenty-two variants of speed increasers are further generated and analyzed, four of which are innovative solutions proposed by the authors. The paper also provides guidelines for identifying the WT conversion system concept according to the circumstances of its application.

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Lim, Jonas J. B., and Arthur G. Erdman. "Application of Type Synthesis Theory to the Redesign of a Complex Surgical Instrument." Journal of Biomechanical Engineering 124, no. 3 (May 21, 2002): 265–72. http://dx.doi.org/10.1115/1.1468635.

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Surgical instruments consist of basic mechanical components such as gears, links, pivots, sliders, etc., which are common in mechanical design. This paper describes the application of a method in the analysis and design of complex surgical instruments such as those employed in laparoscopic surgery. This is believed to be the first application of type synthesis theory to a complex medical instrument. Type synthesis is a methodology that can be applied during the conceptual phase of mechanical design. A handle assembly from a patented laparoscopic surgical stapler is used to illustrate the application of the design method developed. Type synthesis is applied on specific subsystems of the mechanism within the handle assembly where alternative design concepts are generated. Chosen concepts are then combined to form a new conceptual design for the handle assembly. The new handle assembly is improved because it has fewer number of parts, is a simpler design and is easier to assemble. Surgical instrument designers may use the methodology presented here to analyze the mechanical subsystems within complex instruments and to create new options that may offer improvements to the original design.

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Sturges, Robert H., Kathleen O'Shaughnessy, and Mohammed I. Kilani. "Computational model for conceptual design based on extended function logic." Artificial Intelligence for Engineering Design, Analysis and Manufacturing 10, no. 4 (September 1996): 255–74. http://dx.doi.org/10.1017/s089006040000161x.

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AbstractFunction logic methods have been successfully used in Value Analysis (VA) and Value Engineering (VE) for several decades. This functional approach attempts to provide a common language for specialists in multiple domains. This paper describes an extension of function logic that assists in systematic identification of design functions, allocations, and their interrelations. Our approach identifies a three-level function/allocation/component information structure to represent the state of the design. We illustrate new types of links that exist between functions and the effect of these on the representation of the interrelated functions. These linkages provide new pathways for design information and function evaluation through allocation arithmetic and supported functions. A computational model of the conceptual design process is proposed based on the extended function logic design representation. An outline of the inputs, outputs and operations on form and function variables is given as a step prior to the synthesis process. We illustrate, by example, the process of translating functional representations across specialist domains. Finally, a computer-based aid to developing functional models is described.

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Rakov, Dmitry. "Acceleration of Evaluation, Synthesis and Selection of Engineering Solutions by Morphological Approaches." MATEC Web of Conferences 346 (2021): 03031. http://dx.doi.org/10.1051/matecconf/202134603031.

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The article discussed the issues of creating a decision support system in the design process. It is based on morphological methods and approaches. These approaches can be successfully used to accelerate the evaluation, synthesis and selection of engineering solutions at the conceptual design stage. With the help of combinatorics, it is possible to generate a significant number of different engineering solutions. The conceptual stage is the most important in determining the future parameters and characteristics of the designed systems. The article also considers the possibility of computerization of the morphological approach. All this leads to an increase in the efficiency of the design process as a whole.

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Journal articles on the topic 'Conceptual Design Synthesis'

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