| 1. |
- Amadori, Kristian, et al.
(author)
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Flexible and Robust CAD Models for Design Automation
- 2012
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In: Advanced Engineering Informatics. - : Elsevier BV. - 1474-0346 .- 1873-5320. ; 26:2, s. 180-195
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Journal article (peer-reviewed)abstract
- This paper explores novel methodologies for enabling Multidisciplinary Design Optimization (MDO) of complex engineering products. To realize MDO, Knowledge Based Engineering (KBE) is adopted with the aim of achieving design reuse and automation. The aim of the on-going research at Linköping University is to shift from manual modelling of disposable geometries to Computer Aided Design (CAD) automation by introducing generic high-level geometry templates. Instead of repeatedly modelling similar instances of objects, engineers should be able to create more general models that can represent entire classes of objects. The proposed methodology enables utilization of commercial design tools, hence taking industrial feasibility into consideration. High Level CAD templates (HLCt) will be proposed and discussed as the building blocks of flexible and robust CAD models, which in turn enables high-fidelity geometry in the MDO loop. Quantification of the terms flexibility and robustness is also presented, providing a means to measure the quality of the geometry models. Finally, application examples are presented in which the outlined framework is evaluated. The applications have been chosen from three ongoing research projects aimed at automating the design of transport aircraft, industrial robots, and micro air vehicles.
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| 2. |
- Balkenius, Christian, et al.
(author)
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Ikaros: Building Cognitive Models for Robots
- 2010
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In: Advanced Engineering Informatics. - : Elsevier BV. - 1873-5320 .- 1474-0346. ; 24:1, s. 40-48
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Journal article (peer-reviewed)abstract
- The Ikaros project started in 2001 with the aim of developing an open infrastructure for system-level brain modeling. The system has developed into a general tool for cognitive modeling as well as robot control. Here we describe the main parts of the Ikaros system and how it has been used to implement various cognitive systems and to control a number of different robots ranging from robot arms and hands to active vision systems and mobile robots. (C) 2009 Elsevier Ltd. All rights reserved.
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| 3. |
- Elgh, Fredrik, 1971-
(author)
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Decision Support in the Quotation Process of Engineered-to-order Products
- 2012
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In: Advanced Engineering Informatics. - Amsterdam : Elsevier. - 1474-0346 .- 1873-5320. ; 26:1, s. 66-79
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Journal article (peer-reviewed)abstract
- Sub-suppliers acting in the supply chain of the car industry have to adopt a strategy of products customization to be at the competitive edge. This is caused by the diversity of client’s requirements that entails customer engineered products with a high level of variety. A business strategy based on engineered-to-order products requires systems for efficient generation of product variants. This also includes a need of decision support in the order preparation process as well as in the quotation preparation process. Decision support that gives access to detailed and accurate information in the quotation preparation enables a high level of product adaptation while ensuring company efficiency. By the introduction of a design automation system, this can be achieved. However, means to manage different application domains, projects, task knowledge and design information are required together with a possibility to perform detailed analyses on the system generated information. The objective of this work is to contribute in that area. Initially, a number of success criteria were identified and explorative work was conducted for the purpose to develop a conceptual model and principles that an application system would reside upon. The result is a framework consisting of an information model and underlying principles to be used when developing a design automation system for quotation preparation. A system founded on the framework supports management and analysis of quotations and product variants. The functionality and usefulness has been demonstrated and validated by a system implementation developed in collaboration with an industry partner.
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| 4. |
- Heintz, Fredrik, et al.
(author)
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Bridging the sense-reasoning gap: DyKnow - Stream-based middleware for knowledge processing
- 2010
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In: Advanced Engineering Informatics. - : Elsevier. - 1474-0346 .- 1873-5320. ; 24:1, s. 14-26
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Journal article (peer-reviewed)abstract
- Engineering autonomous agents that display rational and goal-directed behavior in dynamic physical environments requires a steady flow of information from sensors to high-level reasoning components. However, while sensors tend to generate noisy and incomplete quantitative data, reasoning often requires crisp symbolic knowledge. The gap between sensing and reasoning is quite wide, and cannot in general be bridged in a single step. Instead, this task requires a more general approach to integrating and organizing multiple forms of information and knowledge processing on different levels of abstraction in a structured and principled manner. We propose knowledge processing middleware as a systematic approach to organizing such processing. Desirable properties are presented and motivated. We argue that a declarative stream-based system is appropriate for the required functionality and present DyKnow, a concrete implemented instantiation of stream-based knowledge processing middleware with a formal semantics. Several types of knowledge processes are defined and motivated in the context of a UAV traffic monitoring application. In the implemented application, DyKnow is used to incrementally bridge the sense-reasoning gap and generate partial logical models of the environment over which metric temporal logical formulas are evaluated. Using such formulas, hypotheses are formed and validated about the type of vehicles being observed. DyKnow is also used to generate event streams representing for example changes in qualitative spatial relations, which are used to detect traffic violations expressed as declarative chronicles.
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| 5. |
- Cheng, J. C. P., et al.
(author)
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Modeling and monitoring of construction supply chains
- 2010
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In: Advanced Engineering Informatics. - : Elsevier BV. - 1474-0346. ; 24:4, s. 435-455
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Journal article (peer-reviewed)abstract
- The planning and management of supply chains require properly specifying the participating members and the relationships among them. Construction supply chains usually consist of numerous participants and are complex in structure Representing construction supply chains using a network model can help understand the complexity, support re-configuration, identify the bottlenecks, and prioritize company's resources, as well as add values to the management of construction projects. Using a case example on the mechanical, electrical and plumbing (MEP) processes in a construction project, this paper demonstrates the modeling of construction supply chains using the Supply Chain Operations Reference (SCOR) framework developed by the Supply Chain Council (SCC). The SCOR modeling framework provides a structured and systematic way to model and decompose a supply chain from conceptual representation to process element specificatjavascript:dropdown_help('field-abstract')ion. The SCOR framework is commonly used by corporations for strategic planning of their supply chains This paper further presents a model-based service oriented framework that leverages the SCOR models for performance monitoring of construction supply chains. In the supply chain management and monitoring framework each supply chain process element is implemented as a discrete web service component The framework is built on a service oriented collaborative system. namely SC Collaborator, that we have developed using web service technology, open standards, and open source technologies.
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