| 1. |
- Bucaioni, Alessio, 1987-, et al.
(författare)
-
Towards Model-Based Performability Evaluation of Production Systems
- 2020
-
Ingår i: Work-in-progress at IEEE International Conference on Emerging Technologies and Factory Automation WIP@ETFA. - 9781728189567 ; , s. 1085-1088
-
Konferensbidrag (refereegranskat)abstract
- Future smart factories will be increasingly required to predict expected performance and dependability metrics related to their production processes. Domain-specific metrics include overall equipment effectiveness that measures production system availability/uptime, performance/speed and output quality. In this work-in-progress paper, we take initial steps towards a model-based approach to evaluate production-specific metrics using domain-specific languages, model transformations and stochastic modelling formalism
|
|
| 2. |
- Bujosa Mateu, Daniel, et al.
(författare)
-
Clock Synchronization in Integrated TSN-EtherCAT Networks
- 2020
-
Ingår i: IEEE International Conference on Emerging Technologies and Factory Automation, ETFA. - : Institute of Electrical and Electronics Engineers Inc.. - 9781728189567 ; , s. 214-221
-
Konferensbidrag (refereegranskat)abstract
- Moving towards new technologies, such as Time Sensitive Networking (TSN), in industries should be gradual with a proper integration process instead of replacing the existing ones to make it beneficial in terms of cost and performance. Within this context, this paper identifies the challenges of integrating a legacy EtherCAT network, as a commonly used technology in the automation domain, into a TSN network. We show that clock synchronization plays an essential role when it comes to EtherCAT-TSN network integration with important requirements. We propose a clock synchronization mechanism based on the TSN standards to obtain a precise synchronization among EtherCAT nodes, resulting to an efficient data transmission. Based on a formal verification framework using UPPAAL tool we show that the integrated EtherCAT-TSN network with the proposed clock synchronization mechanism achieves at least 3 times higher synchronization precision compared to not using any synchronization.
|
|
| 3. |
- Domova, Veronika
(författare)
-
Guiding the Operators Attention Among a Plurality of Operator Workstation Screens
- 2020
-
Ingår i: 2020 25TH IEEE INTERNATIONAL CONFERENCE ON EMERGING TECHNOLOGIES AND FACTORY AUTOMATION (ETFA). - : IEEE. - 9781728189567 ; , s. 541-548
-
Konferensbidrag (refereegranskat)abstract
- In the age of extensive industrial digitalization, industrial operators are facing increasing pressure from the growing amount of data being delivered to industrial control rooms. Humans limited perceptual system is the bottleneck when it comes to processing large volumes of information. Too many screens crammed with textual and numerical data make the user disoriented in information potentially leading to fatal mistakes and insufficient situation awareness. This paper explores possibilities of guiding operators attention to the most urgent information by means of visual aid systems. In this work, two concepts of such systems were developed and evaluated in a lab environment. The evaluation results indicate a clear benefit of using the developed concepts.
|
|
| 4. |
- Domova, Veronika, 1987-, et al.
(författare)
-
Improving Usability of Search and Rescue Decision Support Systems : WARA-PS Case Study
- 2020
-
Ingår i: 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
-
Konferensbidrag (refereegranskat)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.
|
|
| 5. |
- Farag, Hossam, et al.
(författare)
-
HyS-R: A Hybrid Subscription-Recovery Method for Downlink Connectivity in 6TiSCH Networks
- 2020
-
Ingår i: 2020 25th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA). - : IEEE. - 9781728189567
-
Konferensbidrag (refereegranskat)abstract
- The Routing Protocol for Low power and lossy network (RPL) is designed to support communication requirements in 6TiSCH networks in Industrial Internet of Things (IIoT) applications. RPL is mostly optimized for uplink communication, however, less attention is given to maintain connectivity for downlink communications. Supporting downlink communications is non-trivial task in process automation and control scenarios within the IIoT. RPL in its current definition is inefficient to support reliable downlink communications in terms of scalability and memory requirements leading to significant degradation in network performance. This paper introduces HyS-R, a Hybrid Subscription-Recovery method to maintain downlink connectivity and mitigate memory limitations in large-scale 6TiSCH networks. The proposed method is based on a relief group that is used as alternative route to unreachable destinations in the network. An intermediate node subscribes to the relief group when it fails to advertise a destination to its next-hop node. In addition, members of the relief group keep searching for alternative forwarders to keep the communication traffic to a minimum. Performance evaluations are carried out and the results demonstrate that the proposed HyS-R attains significant improvements in downlink communications compared to RPL storing and non-storing modes with a margin of energy cost.
|
|
| 6. |
- Fors, Niklas, et al.
(författare)
-
Feature-Oriented Control Programming
- 2020
-
Ingår i: 25th IEEE International Conference on Emerging Technologies and Factory Automation. - 9781728189567 - 9781728189574 ; , s. 1043-1046
-
Konferensbidrag (refereegranskat)abstract
- Managing variability in control programs often requires code duplication or that all variants are anticipated in advance. In this paper, we present a new approach to obtaining modular functionality reuse across variants. Using the language mechanisms diagram inheritance and connection interception, a feature model and an interactive feature-selection wizard can be automatically derived from the control program.
|
|
| 7. |
- Gutiérrez Peón, Pablo, et al.
(författare)
-
Network Fault Tolerance by Means of Diverse Physical Layers
- 2020
-
Ingår i: IEEE International Conference on Emerging Technologies and Factory Automation, ETFA. - : Institute of Electrical and Electronics Engineers Inc.. - 9781728189567 ; , s. 1697-1704
-
Konferensbidrag (refereegranskat)abstract
- Wired networks are deployed in scenarios requiring the highest levels of performance in terms of reliability and timeliness. Unfortunately, broken wires might permanently compromise the network operation unless fault tolerance mechanisms are in place. Fault tolerance is commonly achieved by replicating the wired network components, but this paper examines the use of a wireless backup network, since the wireless physical layer (PHY) is not expected to display permanent failures due to broken wires. Two mechanisms at medium access control (MAC) level are presented to take advantage of the wireless backup network: one allocating redundancy statically and one dynamically. Without loss of generality, redundancy is applied using the standard mechanisms from IEEE 802.3 (Ethernet) and IEEE 802.11 (Wi-Fi). The performance increase added by the backup network is studied both analytically and by simulation, showing considerable improvements in a very compromised midsize wired network. © 2020 IEEE.
|
|
| 8. |
- Hanna, Atieh, et al.
(författare)
-
Towards safe human robot collaboration - Risk assessment of intelligent automation
- 2020
-
Ingår i: IEEE International Conference on Emerging Technologies and Factory Automation, ETFA. - : Institute of Electrical and Electronics Engineers Inc.. - 1946-0759 .- 1946-0740. - 9781728189567 ; , s. 424-431
-
Konferensbidrag (refereegranskat)abstract
- Automation and robotics are two enablers for developing the Smart Factory of the Future, which is based on intelligent machines and collaboration between robots and humans. Especially in final assembly and its material handling, where traditional automation is challenging to use, collaborative robot (cobot) systems may increase the flexibility needed in future production systems. A major obstacle to deploy a truly collaborative application is to design and implement a safe and efficient interaction between humans and robot systems while maintaining industrial requirements such as cost and productivity. Advanced and intelligent control strategies is the enabler when creating this safe, yet efficient, system, but is often hard to design and build.This paper highlights and discusses the challenges in meeting safety requirements according to current safety standards, starting with the mandatory risk assessment and then applying risk reduction measures, when transforming a typical manual final assembly station into an intelligent collaborative station. An important conclusion is that current safety standards and requirements must be updated and improved and the current collaborative modes defined by the standards community should be extended with a new mode, which in this paper is refereed to the deliberative planning and acting mode.
|
|
| 9. |
- Salman Shaik, Mohammad, et al.
(författare)
-
Enabling Fog-based Industrial Robotics Systems
- 2020
-
Ingår i: The 25th International Conference on Emerging Technologies and Factory Automation ETFA2020. - 9781728189567
-
Konferensbidrag (refereegranskat)abstract
- Low latency and on demand resource availability enable fog computing to host industrial applications in a cloud like manner. One industrial domain which stands to benefit from the advantages of fog computing is robotics. However, the challenges in developing and implementing a fog-based robotic system are manifold. To illustrate this, in this paper we discuss a system involving robots and robot cells at a factory level, and then highlight the main building blocks necessary for achieving such functionality in a fog-based system. Further, we elaborate on the challenges in implementing such an architecture, with emphasis on resource virtualization, memory interference management, real-time communication and the system scalability, dependability and safety. We then discuss the challenges from a system perspective where all these aspects are interrelated.
|
|
| 10. |
- Sharifi, Z., et al.
(författare)
-
Towards Formal Analysis of Vehicle Platoons Using Actor Model
- 2020
-
Ingår i: IEEE International Conference on Emerging Technologies and Factory Automation, ETFA. - : Institute of Electrical and Electronics Engineers Inc.. - 9781728189567 ; , s. 1820-1827
-
Konferensbidrag (refereegranskat)abstract
- Vehicle platooning is a promising technology to save the road capacity and also fuel consumption by reducing the distance between the vehicles in the platoon. The closer the cars are to each other, the closer we are to the goals. But, this will increase the need for safety verification. In this paper we use formal methods to verify safety distance in a platoon. To do so, we present a formal actor-based model for a vehicle platoon which incorporates vehicle dynamics and communication protocol. Also, we present a method to do the analysis based on model checking that applies mathematical analysis to reduce the state space. The method uses an upper bound and a lower bound value as network delay, and verifies if a specified vehicle in a platoon has enough distance to the leader during its traveling. © 2020 IEEE.
|
|
