UBC Theses and Dissertations

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UBC Theses and Dissertations

Development of a multi-layer V-model design process and computational tools for mechatronic conceptual design Balkhair, Hani


Conceptual design is a crucial phase in the Design Development Process (DDP) of complex mechatronic systems. Yet, the available design support is not adequate for the Conceptual Design Development Process (CDDP), let alone the entire DDP. Typically, linear methodology, called the V-model, is used in the software development life cycle (SDLC) for the DDP. The developed DDP can as well aid in addressing the customer requirements properly according to the degree of detail that is sought. Also, a Conceptual Integrated Model (CIM) can describe products from different viewpoints and can be developed to aid the simulation-based design. The primary focus of the present thesis is the conceptual design phase. The thesis proposes a hierarchical DDP, where the V-model process is expanded into multiple layers. These layers assist in providing increased flexibility to the DDP, in which each design phase is subjected to a separate and independent integration and evaluation. Through this approach, the required functions can be realized, and the lengthy iteration loops, due to incompatible subsystems, are avoided. The second key objective of the present thesis is to develop a CIM for formal concept modeling using the modeling language SysML with generic design functional libraries. The first set of design libraries are the FB libraries, which aid in the development of the functional structure. The second set of design libraries are Amesim simulation software elements, which help establish the concept simulation models. Also, the challenges of the transformation and exchange of information between a descriptive modeling language – SysML – and a multi-physics modeling language – Amesim – are explored. The last key objective of the present thesis is the use of fuzzy measures and fuzzy integrals for the evaluation of the non-functional requirements of the conceptual design phase, where Sugeno lamda-measures are employed to address the uncertainty of the requirements. The present research is conducted starting with a descriptive study for the development of a design concept model, concept simulation, and concept evaluation of an industrial fish cutting machine, which falls into the category of complex mechatronic systems. The evaluation of the approach focuses on improving the quality of the conceptual design.

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