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Seaborne trade volumes are growing and the resulting traffic load on the road infrastructure in port areas calls for new solutions to improve handling and coordination of vehicles and shipments. In this contribution, a digital twin for truck dispatching operator assistance is presented, which enables the determination of optimal dispatching policies using simulation-based performance forecasts. Proprietary simulation software with limited interfaces, the application deployment in demanding industrial environments, and the integration of real-time sensor information represent three major challenges when realizing digital twin applications for logistics systems. This implementation therefore uses an extensible open-source simulation package and it is coupled with an IoT-platform for easy integration of real-time information. The digital twin is deployed as a cloud-based service, allowing for simple deployment and scalability.
Hofmann, Wladimir & Branding, Fredrik (2019) MIM 2019
Mehr Informationen »The container terminal is the interface for a multitude of parties with different objectives. For the terminal operator the degree of capacity utilisation of their own handling equipment is of great importance. On the other side, shipping companies seek to reduce the vessels’ lay time at berth. The aim of this paper is to illustrate the impact of certain allocation methods for horizontal transportation vehicles over the period of the ships’ total lay time and the capacity utilisation of the gantry cranes. Furthermore, especially the impact of the vehicles’ dual-load capacity is embraced. In addition, main aspects for the analysis refer to the influence of empty transportations and the impact of the insertion of transport orders, which are enabled by the dual-load capacity.
Schwientek, Branding, Lange, Jahn (2018) ASIM 2018
Mehr Informationen »Changeable material flow systems as well as the use of material flow simulation represent approaches to cope with the challenges of future logistics operations in times of growing complexity, frequently varying demands and shorter product lifecycles. Modular plug-and-play continuous conveying systems are a special type of changeable material flow systems suitable to meet the imposed requirements. This paper presents how simulation methods can be applied to support the development of modules for this kind of system. As an example, a simulation model for the virtual commissioning of modules for an "Industry 4.0-Learning Factory" is described.
Hofmann, Wladimir & Ulrich, Jan & Lang, Sebastian & Reggelin, Tobias & Tolujew, Juri (2018)
Mehr Informationen »Implementing a truck appointment system at container terminals is a successful method to smoothen peaks in truck arrivals and thereby reduce truck waiting times and congestion in the port area. This paper aims to analyze different strategies of time window selection for port drayage companies considering different company sizes and competitor’ strategies. The results show that an early booking of appointments at container terminals is beneficial for the success rate of trucking companies. Furthermore, it is highlighted that the truck turn time of small-sized companies in this network is higher than the one of large-sized companies.
Lange, Branding, Schwenzow, Zlotos, Schwientek, Jahn (2018) 6th International Conference LDIC 2018
Mehr Informationen »Increasing complexity is challenging logistics control systems development and commissioning. Emulation and virtual commissioning promise benefits over the classical approach, not only when used for lower level controls (e.g. PLC codes), but also for higher level controls such as material flow controls. This paper describes a general strategy to realize a virtual commissioning (based on VDI 3633), extended by the PDCA-approach known from quality management. A practical example shows how emulation and virtual commissioning can be integrated into and contribute to logistics education.
Hofmann, Wladimir & Langer, Sebastian & Lang, Sebastian & Reggelin, Tobias (2017)
Mehr Informationen »The use of cargo bikes for goods deliveries represents a promising concept of urban logistics. In this contribution, a new simulation-based assessment tool integrating this emission free vehicles in urban distribution systems is presented. First, typical schemes are identified and an analysis of the underlying planning problems is conducted. Second, the developed GIS-based discrete-event simulation model and the coupled tour-planning algorithm are described, implementing the pattern of control optimization. To the best of our knowledge, such a tool is not yet existing. Finally, the tool is applied, evaluating the potential use of cargo bikes for B2B-deliveries in the medium size city of Grenoble in France.
Hofmann, Wladimir & Assmann, Tom & Dolati Neghabadi, Parisa & Cung, Van-Dat & Tolujew, Juri (2017)
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