| 1. |
- Albo, Anton, 1991, et al.
(författare)
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A framework concept for data visualization and structuring in a complex production process
- 2019
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Ingår i: Procedia Manufacturing. - : Elsevier BV. - 2351-9789. ; 38, s. 1642-1651
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Konferensbidrag (refereegranskat)abstract
- This paper provides a concept study for a visual interface framework together with the software Sequence Planner for implementation on a complex industrial process for extracting process information in an efficient way and how to make use of a lot of data to visualize it in a standardized human machine interface for different user perspectives. The concept is tested and validated on a smaller simulation of a paint booth with several interconnected and supporting control systems to prove the functionality and usefulness in this kind of production system. The paper presents the resulting five abstraction levels in the framework concept, from a production top view down to the signal exchange between the different resources in one production cell, together with additional features. The simulation proves the setup with Sequence Planner and the visual interface to work by extract and present process data from a running sequence.
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| 2. |
- Andersson, Alf, et al.
(författare)
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Inline Process Control – a concept study of efficient in-line process control and process adjustment with respect to product geometry
- 2016
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Ingår i: Swedish Production Symposium 2016 SPS 2016. - Lund, Sweden.
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Konferensbidrag (refereegranskat)abstract
- All manufacturing processes have variation which may violate the fulfillment of assembly, functional, geometrical or esthetical requirements and difficulties to reach desired form in all areas. The cost for geometry defects rises downstream in the process chain. Therefore, it is vital to discover these defects as soon as they appear. Then adjustments can be done in the process without losing products or time. In order to find a solution for this, a project with the overall scope “development of an intelligent process control system” has been initiated. This project consists of five different work packages: Inline measurement, Process Evaluation, Corrective actions, Flexible tooling and demonstrator cell. These work packages address different areas which are necessary to fulfill the overall scope of the project. The system shall both be able to detect geometrical defects, propose adjustments and adjust simple process parameters. The results are demonstrated in a demo cell located at Chalmers University of Technology. In the demonstrator all the different areas have been verified in an industrial case study – assembly of GOR Volvo S80. Efficient offline programming for robot based measurement, efficient process evaluation based on case base reasoning (CBR) methodology, flexible fixtures and process adjustments based on corrective actions regarding in going part positioning.
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| 3. |
- Bengtsson, Kristofer, 1979, et al.
(författare)
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Emergency department overview - Improving the dynamic capabilities using an event-driven information architecture
- 2016
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Ingår i: IEEE International Conference on Emerging technologies and factory automation (ETFA) 2016.
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Konferensbidrag (refereegranskat)abstract
- It is challenging to get an overview and understand- ing of what is going on at an emergency department (ED). This is due to the sometimes turbulent work environment and a large variation in patient processes. To increase the dynamic capability and responsiveness of an ED, it is important that the staff and patients have an overview of what is going on and what will happen in the coming hours. This paper presents a smart online support software that shows the current state of the ED as well as a prediction of the coming hours. The software has been developed as a case study of using agile development ideas when developing new systems for hospitals. The result shows that the use of the event-driven information architecture for healthcare (EVAH) enabled a rapid development of a successful running application, helping the nurses getting an overview of current situation and the coming hours.
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| 4. |
- Bengtsson, Kristofer, et al.
(författare)
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Framtidens skadeplats : intervjuer med landstingens beredskapssamordnare
- 2016
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Syftet med föreliggande studie var att genom intervjuer med beredskapssamordnare från Sveriges landsting försöka skapa en bild av hur uppfattningen var att skadeplatsen såg ut idag och skulle kunna kommat att förändras på sikt. Vidare önskade intervjustudien söka svar på frågor som rörde komplexiteten på skadeplatsen genom att diskutera ledningsförhållanden, samverkan med andra aktörer, alarmerings- och dirigeringsfunktionernas roll i det svenska sjukvårdsystemet samt hur ett möjligt arbete med ett återtagande av förmågan till ett civilt försvar skulle påverka systemet i sin helhet. Överlag har detta syfte uppnåtts genom ett rikt material kring relevanta frågeställningar som belyst ett flertal kritiska aspekter både i dagens situation men även för framtiden.Resultatet ger en relativt entydig bild av hur situationen uppfattas på landstingsnivå idag av personalen som behandlar beredskapsfrågorna. Den bild som målas upp fokuserar kanske främst på en upplevd avsaknad av centrala och nationellt övergripande styrningar vilket menligt påverkar förmågan att lyfta ledningsförmågan från regional till nationell nivå vid en större händelse som överstiger den regionala förmågan. Den svenska modellen för att hantera samhällsstörningar av idag är väl anpassad för att hantera händelser inom ramen för det egna länets geografiska område. Befintliga koncept för samverkan och samordning bedöms fungera bra i vardagen, exempelvis vid de vanligaste fallen av skadeplatser: trafik och brand. Detta innebär dock att systemet fungerar väl under förutsättning att händelsen är begränsad i såväl tid och rum som vad avser antalet drabbade. En större händelse eller flera händelser samtidigt på olika platser, särskilt om det finns försvårande faktorer såsom utsläpp av farliga ämnen eller en högre hotbild, skapar försvårande omständigheter som upplevs svårhanterliga idag. I ett framtida scenario upplevs även risken för dessa händelser och terrorattacker att öka. Avhängigheten av IT samt ett samhälle som i allt högre grad förlitar sig på ”just in time”-leveranser gör att sårbarheten har ökat och upplevs fortsätta göra det även i framtiden. Andra viktiga områden som lyfts är nuvarande och befarad framtida brist på kompetent personal samt att utbildnings- och övningsverksamhet inte kan bedrivas i önskvärd utsträckning, delvis på grund av personalbrist och –omsättning.Vidare syns den generella uppfattningen vara att det saknas ett tydligt ledarskap på nationell nivå då det sällan, om alls, utkommer några direkta styrningar rörande vad som skall uppnås och i vilken utsträckning. Detta har också påvisats i avsnittet ovan rörande före-, under- och efterperspektivet där det finns en klart övervägande del synpunkter på de två förstnämnda perspektiven. Nationell styrning är alltså något som uppfattas vara efterfrågat och då inte bara avseende ledning under insats utan även i frågor rörande enhetlig utrustning och metodik samt utbildnings- och övningsfrågor. Få respondenter har tagit upp efterperspektivet i någon större utsträckning men då det har förekommit har det framförallt berört erfarenhetshanteringsfrågor och den brist som upplevs finnas inom detta specifika område idag. Erfarenheter från den egna verksamheten, såväl i vardagen som vid insatser vid allvarliga händelser, behöver tas om hand, följas upp och sedan utgöra grund för ett levande utvecklingsarbete.
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| 5. |
- Bohlin, Robert, 1972, et al.
(författare)
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Data Flow and Communication Framework Supporting Digital Twin for Geometry Assurance
- 2018
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Ingår i: ASME 2017 International Mechanical Engineering Congress and Exposition. ; 2
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Konferensbidrag (refereegranskat)abstract
- Faster optimization algorithms, increased computer power and amount of available data, can leverage the area of simulation towards real-time control and optimization of products and production systems. This concept — often referred to as Digital Twin — enables real-time geometry assurance and allows moving from mass production to more individualized production. To master the challenges of a Digital Twin for Geometry Assurance the project Smart Assembly 4.0 gathers Swedish researchers within product development, automation, virtual manufacturing, control theory, data analysis and machine learning. The vision of Smart Assembly 4.0 is the autonomous, self-optimizing robotized assembly factory, which maximizes quality and throughput, while keeping flexibility and reducing cost, by a sensing, thinking and acting strategy. The concept is based on active part matching and self-adjusting equipment which improves geometric quality without tightening the tolerances of incoming parts. The goal is to assemble products with higher quality than the incoming parts. The concept utilizes information about individual parts to be joined (sensing), selects the best combination of parts (thinking) and adjust locator positions, clamps, weld/rivet positions and sequences (acting). The project is ongoing, and this paper specifies and highlights the infrastructure, components and data flows necessary in the Digital Twin in order to realize Smart Assembly 4.0. The framework is generic, but the paper focuses on a spot weld station where two robots join two sheet metal parts in an adjustable fixture.
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| 6. |
- Dahl, Martin, 1984, et al.
(författare)
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Automatic modeling and simulation of robot program behavior in integrated virtual preparation and commissioning
- 2017
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Ingår i: Procedia Manufacturing. - : Elsevier BV. - 2351-9789. ; 11, s. 284-291
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Tidskriftsartikel (refereegranskat)abstract
- This paper presents a method where the behavior of a robot cell is automatically modeled based on existing robot programs and a simulation model of the cell. Robot programs from the shop floor are uploaded into a virtual manufacturing tool, and a formal model is then generated from the robot programs. Then, control logic is automatically calculated, and the fastest possible execution order is found by using the generated model to formulate an optimization problem. The result is continuously analyzed and validated by simulation in the virtual manufacturing tool.
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| 7. |
- Dahl, Martin, 1984, et al.
(författare)
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Control components for Collaborative and Intelligent Automation Systems
- 2019
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Ingår i: IEEE International Conference on Emerging Technologies and Factory Automation, ETFA. - 1946-0759 .- 1946-0740. ; 2019-September, s. 378-384
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Konferensbidrag (refereegranskat)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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| 8. |
- Dahl, Martin, 1984, et al.
(författare)
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Integrated Virtual Preparation and Commissioning: supporting formal methods during automation systems development
- 2016
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Ingår i: IFAC-PapersOnLine. - : Elsevier BV. - 2405-8963. ; 49:12, s. 1939-1944
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Konferensbidrag (refereegranskat)abstract
- Virtual commissioning – the development and validation of industrial control systems against a simulation model – is attracting interest in the automotive industry. The main motivation for its use is that control systems can start to be integrated and tested before the construction of the physical system. In addition to this, the ability to continuously test can lead to increased reliability and enables better coping with late changes. At the same time, using formal methods during production preparation and control system design promise similar benefits. Formal methods however, are not seeing the same surge in interest – they are rarely used in the automotive industry. In this paper a framework is proposed, Integrated Virtual Preparation and Commissioning, where virtual commissioning models are used as a base for preparation and control system implementation assisted by formal methods. The extensive use of simulation in virtual commissioning allows computation results from formal methods to be continuously validated by visual inspection and using existing analysis tools (e.g. collision detection methods). The framework is applied in a case study, where the combination of a simulation model and a formal model is used as an aid in generating operation sequences for validation during production preparation. The resulting formal model can be used to study the behavior of the production system before a control system has been implemented.
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| 9. |
- Dahl, Martin, 1984, et al.
(författare)
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Sequence Planner: Supporting Integrated Virtual Preparation and Commissioning
- 2017
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Ingår i: IFAC-PapersOnLine. - : Elsevier BV. - 2405-8963. ; 50:1, s. 5818-5823
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Konferensbidrag (refereegranskat)abstract
- It is essential to understand the operation sequences of a production system when designing or changing it. This paper will demonstrate how the software tool Sequence Planner (SP) not only supports this understanding by sequence visualization, but also improves the solution using optimization and verification. SP is a tool for modeling and analyzing automation systems. The tool has been developed since 2007 with an initial focus on supporting engineers when developing control code for programmable logical controllers. Today, SP is a micro-service architecture, usable in various areas like runtime control, online monitoring, energy optimization, and even emergency department patient planning. This paper presents a use case at an automotive company, where the operation sequences in a large number of automated robot stations, need to be modified. SP, together with virtual commissioning tools, automates this modification by identifying, optimizing, verifying and simulating operation sequences, and then updates the robot and control programs. This use case demonstrates the strength of SP and its architecture and how it is used for integrated virtual preparation and commissioning.
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| 10. |
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