A Structured Approach for Function Based Decomposition of Complex Multi-disciplinary Systems

Campean, Felician; Henshall, Edwin; Yildirim, Unal; Uddin, Amad; Williams, Huw

doi:10.1007/978-3-642-30817-8_12

Cited by 9 publications

(12 citation statements)

References 10 publications

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“…The functional models have a variety of such function structures ranging from hierarchical trees to flow oriented approaches (Pahl et al, 2007;Campean et al, 2013) as illustrated in Figures 2.…”

Section: Functional Modellingmentioning

confidence: 99%

“…It is also essential to take into account and specify the measurable attributes associated with operands as discussed by Hubka and Eder (1996). To overcome this limitation, another type of function structure, system state flow diagram (SSFD), is recently introduced by Campean et al (2013) and Yildirim and Campean (2014), shown in Figure 2(c). This type of representation identifies and arranges the functions associated with the transition of main and secondary flows from their input states to output states by a set of measurable attributes.…”

Section: Review Of Product Modelling Frameworkmentioning

confidence: 99%

“…The product is usually complex in its requirements, functions, and components domains. Researchers often consider many inter-related domains which are necessary and useful for the product design and architecture analysis (Deubzer & Lindemann, 2009;Uddin et al, 2013). In practice, design engineers tend to deal with product complexity by breaking down the complex problem into smaller problems (Chmara et al, 2008;Pimmler & Eppinger, 1994).…”

Section: Introductionmentioning

confidence: 99%

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A framework for complex product architecture analysis using an integrated approach

Uddin

Khan

Campean

et al. 2016

Concurrent Engineering

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Contemporary design decomposition and synthesis analytical tasks at the conceptual design stage reply on functional and structural modelling approaches. There is a wide diversity of elements used by various modelling approaches for information and representation of product architecture, which incurs difficulties for multidisciplinary engineers working across different phases of design in capturing, visualising, sharing and tracing consistent yet common knowledge and elements across the function and structure domains. This prompts for fixation of detail and common modelling knowledge across both functional and structural analytical approaches which is also critical from automatized software perspective. A limitation of existing approaches is that they tend to focus more on 'what' and less on 'how' (and vice versa). This paper proposes an integrated conceptual product architecting approach that combines and expands the functional and structural modelling approaches, enabling capturing and tracing knowledge coherently through a common binding domain. This is underpinned by the view that most interaction requirements amongst the physical components during structural modelling can be derived from functional modelling. The proposed integrated approach is underpinned by the critical analysis and synthesis of existing approaches in literature dealing with functional and structural architecture analysis, integrated within a Multiple Domain Matrix (MDM) to fuse the knowledge of both solution independent (functional) and dependent (structural) analyses. The proposed framework is illustrated with a case study of solar robot toy, followed by discussion and suggestions for future work.

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Section: Functional Modellingmentioning

confidence: 99%

Section: Review Of Product Modelling Frameworkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A framework for complex product architecture analysis using an integrated approach

Uddin

Khan

Campean

et al. 2016

Concurrent Engineering

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“…The SSFD was initially introduced to support design failure mode avoidance methodologies in industrial practice, by promoting a consistent solution-neutral function decomposition across systems engineering levels (Campean et al, 2011; Campean, Henshall, Yildirim, et al, 2013). The SSFD is underpinned by the general principle of defining functions and functional requirements in relation to the state transitions of the operand (Albers et al, 2011); that is, a function is the relation between the input and the output state of the operand.…”

Section: Introductionmentioning

confidence: 99%

Function modeling using the system state flow diagram

Yildirim

Campean

Williams

2017

AIEDAM

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This paper introduces a rigorous framework for function modeling of complex multidisciplinary systems based on the system state flow diagram (SSFD). The work addresses the need for a consistent methodology to support solution-neutral function-based system decomposition analysis, facilitating the design, modeling, and analysis of complex systems architectures. A rigorous basis for the SSFD is established by defining conventions for states and function definitions and a representation scheme, underpinned by a critical review of existing literature. A set of heuristics are introduced to support the function decomposition analysis and to facilitate the deployment of the methodology with strong practitioner guidelines. The SSFD heuristics extend the existing framework of Otto and Wood (2001) by introducing a conditional fork node heuristic, to facilitate analysis and aggregation of function models across multiple modes of operation of the system. The empirical validation of the SSFD function modeling framework is discussed in relation to its application to two case studies: a benchmark problem (glue gun) set for the engineering design community; and an industrial case study of an electric vehicle powertrain. Based on the evidence from the two case studies presented in the paper, a critical evaluation of the SSFD function modeling methodology is discussed based on the function benchmarking framework established by Summers et al. (2013), considering the representation, modeling, cognitive, and reasoning characteristics. The significance of this paper is that it establishes a rigorous reference framework for the SSFD function representation and a consistent methodology to guide the practitioner with its deployment, facilitating its impact to industrial practice.

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“…Because of the availability of modular sub-systems such as vision systems, drive systems (motors, pneumatics), control systems, integrable mechanical components (ball bearing, gearing, and several complex components), communication systems and electronic interfaces, it has been easier to integrate these sub-systems in order to develop desirable application-oriented machineries and platforms. The system integration (SI) has been playing a vital role in developing complex designs (Campean et al, 2013;www.robotshop.com and www.youtube.com/watch?v¼I8t5um868j8). Plate 1 shows quadcopter build from the sub-systems (www.robotshop.com and www.youtube.com/ watch?v¼I8t5um868j8).…”

Section: Introductionmentioning

confidence: 99%

4WD mobile robot for autonomous steering using single camera based vision system

Kim

Suprem

et al. 2014

International Journal of Intelligent Unmanned Systems

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Purpose – The purpose of this paper is to demonstrate System-of-Systems (SoS) approach to design and development of unmanned robotic platform for greenhouse agricultural application. Design/methodology/approach – SoS design approach is important in developing engineering products. It was observed that while system integration considers designs in a multi-disciplinary level framework, SoS is viewed as a solution focussed approach. In this paper, the authors have demonstrated SoS approach to develop a mobile robot platform. The wheels of the platform are independently controlled by using brushless DC and stepper motors based on fieldbus type Distributed Control System scheme. Findings – The constraints for autonomous traveling were identified during the first phase followed by development of 12 distinct sub-routines during second phase of training. Optimal camera installation angle, driving speeds, steering angle per pixel were found to be valuable constraints for feed-forward parameters for real-time driving. The platform was field tested in a tomato planted greenhouse for yield and weed mapping. Research limitations/implications – The paper focusses on studying vision-based autonomous four-wheel-drive (4WD) constraints and their implementation limitations. Practical implications – The platform was field tested in a tomato planted greenhouse for yield and weed mapping. Social implications – The platform can be used for agricultural operations such as crop scouting, monitoring, spraying, and mapping in a medium to large-scale greenhouse setting. Originality/value – The research and presentation is original. Starting from its mechanical specification to wheel performance study, development of path patterns for training and global navigation algorithm for testing and validation were achieved. The platform can autonomously be driven without any manual intervention.

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A Structured Approach for Function Based Decomposition of Complex Multi-disciplinary Systems

Cited by 9 publications

References 10 publications

A framework for complex product architecture analysis using an integrated approach

A framework for complex product architecture analysis using an integrated approach

Function modeling using the system state flow diagram

4WD mobile robot for autonomous steering using single camera based vision system

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