TY  - CHAP
A1  - Ferrein, Alexander
A1  - Kallweit, Stephan
A1  - Lautermann, Mark
T1  - Towards an autonomous pilot system for a tunnel boring machine
T2  - 5th Robotics and Mechatronics Conference of South Africa (ROBMECH) : 26 - 27 November 2012 ; CSIR International Conference Centre Gauteng South Africa
Y1  - 2012
SN  - 978-1-4673-5183-6
N1  - Robotics and Mechatronics Conference of South Africa <5, 2012, Johannesburg> ; ROBOMECH <5, 2012, Johannesburg>
PB  - IEEE
CY  - Piscataway, NJ
ER  - 
TY  - JOUR
A1  - Braun, Sebastian
A1  - Cheng, Chi-Tsun
A1  - Dowey, Steve
A1  - Wollert, Jörg
T1  - Performance evaluation of skill-based order-assignment in production environments with multi-agent systems
JF  - IEEE Journal of Emerging and Selected Topics in Industrial Electronics
N2  - The fourth industrial revolution introduces disruptive technologies to production environments. One of these technologies are multi-agent systems (MASs), where agents virtualize machines. However, the agent's actual performances in production environments can hardly be estimated as most research has been focusing on isolated projects and specific scenarios. We address this gap by implementing a highly connected and configurable reference model with quantifiable key performance indicators (KPIs) for production scheduling and routing in single-piece workflows. Furthermore, we propose an algorithm to optimize the search of extrema in highly connected distributed systems. The benefits, limits, and drawbacks of MASs and their performances are evaluated extensively by event-based simulations against the introduced model, which acts as a benchmark. Even though the performance of the proposed MAS is, on average, slightly lower than the reference system, the increased flexibility allows it to find new solutions and deliver improved factory-planning outcomes. Our MAS shows an emerging behavior by using flexible production techniques to correct errors and compensate for bottlenecks. This increased flexibility offers substantial improvement potential. The general model in this paper allows the transfer of the results to estimate real systems or other models.
KW  - cyber-physical production systems
KW  - event-based simulation
KW  - multi-agent systems
KW  - digital factory
KW  - industrial agents
Y1  - 2021
U6  - http://dx.doi.org/10.1109/JESTIE.2021.3108524
SN  - 2687-9735
IS  - Early Access
PB  - IEEE
CY  - New York
ER  - 
TY  - CHAP
A1  - Evans, Benjamin
A1  - Braun, Sebastian
A1  - Ulmer, Jessica
A1  - Wollert, Jörg
T1  - AAS implementations - current problems and solutions
T2  - 20th International Conference on Mechatronics - Mechatronika (ME)
N2  - The fourth industrial revolution presents a multitude of challenges for industries, one of which being the increased flexibility required of manufacturing lines as a result of increased consumer demand for individualised products. One solution to tackle this challenge is the digital twin, more specifically the standardised model of a digital twin also known as the asset administration shell. The standardisation of an industry wide communications tool is a critical step in enabling inter-company operations. This paper discusses the current state of asset administration shells, the frameworks used to host them and their problems that need to be addressed. To tackle these issues, we propose an event-based server capable of drastically reducing response times between assets and asset administration shells and a multi-agent system used for the orchestration and deployment of the shells in the field.
KW  - Industry 4.0
KW  - Multi-agent Systems
KW  - Digital Twin
KW  - Asset Administration Shell
Y1  - 2022
SN  - 978-1-6654-1040-3
U6  - http://dx.doi.org/10.1109/ME54704.2022.9982933
PB  - IEEE
ER  - 
TY  - JOUR
A1  - Cheng, Chi-Tsun
A1  - Wollert, Jörg
A1  - Chen, Xi
A1  - Fapojuwo, Abraham O.
T1  - Guest Editorial : Circuits and Systems for Industry X.0 Applications
JF  - IEEE Journal on Emerging and Selected Topics in Circuits and Systems
Y1  - 2023
U6  - http://dx.doi.org/10.1109/JETCAS.2023.3278843
SN  - 2156-3357 (Print)
SN  - 2156-3365 (Online)
VL  - 13
SP  - 457
EP  - 460
PB  - IEEE
CY  - New York
ET  - 2
ER  -