| 1. |
- Albo, Anton, 1991, et al.
(author)
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Modular Virtual Preparation method of production systems using a Digital Twin architecture
- 2021
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In: IEEE International Conference on Emerging Technologies and Factory Automation, ETFA. - 1946-0740 .- 1946-0759. ; 2021-September
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Conference paper (peer-reviewed)abstract
- Even though virtual engineering and preparational work within the automotive industry has become more widely used over the last years with its possibilities to improve software quality and reduce physical commissioning time, it is still a costly investment for most companies when implementing or upgrading production systems. The different approaches and key factors to reduce the costs are to investigate how to reduce the development time of modeling and which practice or standard is most suitable for a certain application. A developer needs to expand the utilization of the virtual work and the re-usability of its digital models, in addition, to find a balance of the required level of modeling details according to the required functionality. This paper presents a framework with a modular software setup that simulates a 3-DOF robot in three different cases with different levels of detail. The outcome of the cases is evaluated in the context of functionality, usefulness, and affordability. The paper further discusses and explores potential use in regards to the concept of Virtual Commissioning and Digital Twin.
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| 2. |
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| 3. |
- Bergagård, Patrik, 1984, et al.
(author)
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Derivation of placement transitions for offline calculation of restart states
- 2013
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In: IEEE International Conference on Emerging Technologies and Factory Automation, ETFA. - 1946-0759 .- 1946-0740.
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Conference paper (peer-reviewed)abstract
- This paper presents a preprocess to an existing method for offline calculation of restart states for manufacturing systems modeled by operations. In the existing method, placement transitions are used to model restart in restart states from potential error states, and supervisory control theory is used to calculate which of these transitions are valid. With the proposed preprocess, the precedence andthe alternative dependencies between the operations are exploited in order to reduce the number of such placement transitions which are required in the model used by theexisting method. With such a reduced model, the valid restart states for larger and more complex systems can be calculated.
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| 4. |
- Corneo, Lorenzo, et al.
(author)
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Service Level Agreements for Safe and Configurable Production Environments
- 2018
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In: IEEE International Conference on Emerging Technologies and Factory Automation, ETFA. - : IEEE. - 1946-0759 .- 1946-0740. ; 2018-September
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Conference paper (peer-reviewed)abstract
- This paper focuses on Service Level Agreements (SLAs) for industrial applications that aim to port some of the control functionalities to the cloud. In such applications, industrial requirements should be reflected in SLAs. In this paper, we present an approach to integrate safety-related aspects of an industrial application to SLAs. We also present the approach in a use case. This is an initial attempt to enrich SLAs for industrial settings to consider safety aspects, which has not been investigated thoroughly before.
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| 5. |
- Dahl, Martin, 1984, et al.
(author)
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Control components for Collaborative and Intelligent Automation Systems
- 2019
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In: IEEE International Conference on Emerging Technologies and Factory Automation, ETFA. - 1946-0759 .- 1946-0740. ; 2019-September, s. 378-384
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Conference paper (peer-reviewed)abstract
- Collaborative and intelligent automation systems need intelligent control systems. Some of this intelligence exist on a per-component basis in the form of vision, sensing, motion, and path planning algorithms. To fully take advantage of this intelligence, also the coordination of subsystems need to exhibit intelligence. While there exist middleware solutions that eases communication, development, and reuse of such subsystems, for example the Robot Operating System (ROS), good coordination also requires knowledge about how control is supposed to be performed, as well as expected behavior of the subsystems. This paper introduces lightweight components that wraps ROS2 nodes into composable control components from which an intelligent control system can be built. The ideas are implemented on a use case involving collaborative robots with on-line path planning, intelligent tools, and human operators.
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| 6. |
- Dahl, Martin, 1984, et al.
(author)
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Virtual Reality Commissioning in Production Systems Preparation
- 2017
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In: IEEE International Conference on Emerging Technologies and Factory Automation, ETFA. - 1946-0740 .- 1946-0759. - 9781509065059
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Conference paper (peer-reviewed)abstract
- Virtual commissioning (VC) is a method used to virtually visualize and test production systems, control logic and material flows. The focus of this paper is to further extend this concept using Virtual Reality (VR). The introduction of VR in VC enhances the concept by adding a more realistic visualization and movement tracking which extends the possibilities of its validation. The changes to the validation aspect are mainly due to the fact that it is now possible to interact with the running virtual production in a realistic and intuitive way. The interaction gives designers and operators a new possibility to go from being observers to actors in the design phase. They are now able to validate the production system, test security protocols and validate the human interaction with the system, using VR.
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| 7. |
- Danielsson, Jakob, et al.
(author)
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Investigating execution-characteristics of feature-detection algorithms
- 2017
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In: IEEE Conference on Emerging Technologies and Factory Automation. - : Institute of Electrical and Electronics Engineers Inc.. - 1946-0740 .- 1946-0759. ; Part F134116, s. 1-4
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Journal article (peer-reviewed)abstract
- We discuss how to obtain information of execution characteristics, such as parallelizability and memory utilization, with the final aim to improve the performance and predictability of feature and corner detection algorithms for use in e.g. robotics and autonomous machines. Our aim is to obtain a better understanding of how computer vision algorithms use hardware resources and how to improve the time predictability and execution time of such algorithms when executing on multi-core CPUs. We evaluate a fork-join model applicable to feature detection algorithms and present a method for measuring how well the algorithm performance correlates with hardware resource usage. We have applied our method to the Featured from Accelerated Segment Test (FAST) algorithm. Our characterization of FAST reveals that it is an algorithm with excellent parallelism opportunities, resulting in an almost linear speed-up per core. Our measurements also reveal that the performance of FAST correlates very little with the number number of misses in the L1 data cache, L1 instruction cache, data translation lookaside buffer and L2 cache. Thus, the FAST algorithm will not have a negative effect on the execution time when the input data fits in the L2 cache.
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| 8. |
- Domova, Veronika, 1987-, et al.
(author)
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Improving Usability of Search and Rescue Decision Support Systems : WARA-PS Case Study
- 2020
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In: Proceedings 25th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA 2020. - Vienna, Austria : Institute of Electrical and Electronics Engineers (IEEE). - 9781728189574 - 9781728189567 ; 2020-September, s. 1251-1254
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Conference paper (peer-reviewed)abstract
- Novel autonomous search and rescue systems, although powerful, still require a human decision-maker involvement. In this project, we focus on the human aspect of one such novel autonomous SAR system. Relying on the knowledge gained in a field study, as well as through the literature, we introduced several extensions to the system that allowed us to achieve a more user-centered interface. In the evaluation session with a rescue service specialist, we received positive feedback and defined potential directions for future work.
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| 9. |
- Ebrahimi, Amir Hossein, 1976, et al.
(author)
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Formal analysis of product variability and the effects on assembly operations
- 2015
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In: IEEE International Conference on Emerging Technologies and Factory Automation, ETFA. - 1946-0759 .- 1946-0740. - 9781467379298 ; 2015-October
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Conference paper (peer-reviewed)abstract
- A challenge for highly configurable products, like vehicles, is that the product system has to support all possible variants that can be configured by a customer. The production system is often highly automated with software in robots, machines and programmable logic controllers that need to be prepared to handle all possible variants. The link between the product and the assembly system can be expressed through operations where each operation models how a part in the bill-of-material is assembled to the product to be built. Typically the operations have precedence constraints that express that certain parts have to be assembled before other parts might be assembled. Given only the precedence constraints a product can generally be assembled in many different ways and through line balancing the operations are assigned to different stations, machines, and/or assembly workers. For configurable products the bill-of-material might be different for each variant, consequently the necessary operations will be different. However, since the operations have precedence constraints we have to make sure that all possible variants can be successfully assembled while still satisfying all precedence constraints. The contribution in this paper is a fully automated novel method that can determine if all possible product variants can be successfully assembled while still satisfying precedence constraints between operations.
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| 10. |
- Erös, Endre, 1990, et al.
(author)
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Evaluation of high level methods for efficient planning as satisfiability
- 2021
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In: IEEE International Conference on Emerging Technologies and Factory Automation, ETFA. - 1946-0740 .- 1946-0759. - 9781728129891 ; 26
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Conference paper (peer-reviewed)abstract
- Fast planning algorithms play a key role in intelligent automation systems where control sequences are constantly calculated. In order to determine which algorithms increase planning performance, we evaluate and compare several high level planning methods on a set of standard benchmarks. We focus on planning as satisfiability as the leading approach for solving difficult planning problems.
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