| 1. |
- Hallmans, Daniel, et al.
(författare)
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A method and industrial case : Replacement of an FPGA component in a legacy control system
- 2015
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Ingår i: Proceeding - 2015 IEEE International Conference on Industrial Informatics, INDIN 2015. - 9781479966493 ; , s. 208-214
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Konferensbidrag (refereegranskat)abstract
- A significant part of industrial systems have requirements on long life times. Such requirements on the complete system impose requirements on its corresponding embedded systems to be operational for an equally long time. As a consequence it is of paramount importance to be able to replace obsolete components of the embedded systems during the life time of the system, and to be able to update part of the design due to new requirements. In this paper we present a method to manage component replacement in such systems, and we present an industrial case study highlighting the work needed to replace an FPGA chip with another, including all corresponding legacy FPGA design challenges that comes with such a replacement. We have found one larger problem inherent in the ability to use the included components in a way that is not possible with the new circuits replacing the old ones. This problem significantly increased the work needed when performing the conversion and migration from the old design to the new, since parts of the design had to be redesigned from a functional perspective.
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| 2. |
- Hallmans, Daniel, et al.
(författare)
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Challenges in providing sustainable analytic of system of systems with long life time
- 2021
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Ingår i: 2021 16th International Conference of System of Systems Engineering (SoSE). - 9781665444545 ; , s. 69-74
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Konferensbidrag (refereegranskat)abstract
- Embedded systems are today often self-sufficient systems with limited communication. However, this traditional view of an embedded system is changing rapidly. Embedded systems are nowadays evolving, e.g., an evolution pushed by the increased functional gain introduced with the concept of System of Systems (SoS) that is connecting multiple subsystems to achieve a combined functionality and/or information of a higher value. In such a SoS the subsystems will have to serve a dual purpose in a) the initial purpose that the subsystem was originally designed and deployed for, e.g., control and protection of the physical assets of a critical infrastructure system that could be up and running for 30-40 years, and b) at the same time provide information to a higher-level system for a potential future increase of system functionality as technology matures and/or new opportunities are provided by, e.g., greater analytics capabilities. In this paper, within the context of a “dual purpose use” of a) and b), we bring up three central challenges related to i) information gathering, ii) life-cycle management, and iii) data governance, and we propose directions for solutions to these challenges that need to be evaluated already at design time.
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| 3. |
- Hallmans, Daniel, et al.
(författare)
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Consistent sensor values on a real-time ethernet network
- 2016
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Ingår i: IEEE International Workshop on Factory Communication Systems - Proceedings, WFCS. - 9781509023394
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Konferensbidrag (refereegranskat)abstract
- Industrial control systems often exhibit a need for short latencies and/or consistent data gathering. In a system with limited resources it is a challenge to achieve the combination of short latencies and consistent data. In this paper we propose three different architectural solutions to this challenge, each having different trade-offs: one that gives a consistent set of data and also a short latency but with a higher resource usage, a second alternative that reduces resource needs but at the cost of an increased latency, and a third and final solution that reduces resource needs to a minimum but in doing so also increasing the latency. The results presented in this paper suggest that it is possible to get low latency and robustness at the cost of performance.
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| 4. |
- Hallmans, Daniel, et al.
(författare)
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GPGPU for Industrial Control Systems
- 2013
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Ingår i: 18th IEEE International Conference on Emerging Technologies & Factory Automation ETFA'13. - 9781479908622 ; , s. Article number 6648166-
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Konferensbidrag (refereegranskat)abstract
- In this work in progress paper we present parts of our ongoing work on using the Graphical Processing Unit (GPU) in the context of Embedded Systems. As a first step we are investigating the possibility to move functions from a Digital Signal Processor (DSP) to a GPU. If it is possible to make such a migration then it would simplify the hardware designs for some embedded systems by removing external hardware and also remove a potential life cycle issue with obsolete components. We are currently designing a test system to be able to compare performance between a legacy control system used today in industry, based on a CPU/DSP combination, to a new design with a CPU/GPU combination. In this setting the pre-filtering of sampled data, previously done in the DSP, is moved to the GPU.
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