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Adaptive Automation Strategies for Increasing Variability in Design and Production
Linköping University, Department of Management and Engineering, Product Realisation. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0003-1745-3869
2026 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The increasing demand for customized products, together with the need for flexible, human-centric, and resilient manufacturing systems has intensified the need for automation solutions capable of operating in dynamic and unstructured industrial environments. This dissertation shows how automation methodologies evolve and where they fail as complexity and variability increase across the design and production domains.

The research begins by addressing time-consuming and iterative engineering tasks through design automation. Using Knowledge-Based Engineering (KBE) approaches, automated frameworks were developed to streamline engineering workflows and support consistent decision-making in structured industrial settings. However, when extending the focus to real-world production, the growing complexity and uncertainty of the environment create substantial challenges for both design and production automation.

While KBE provides structure and consistency, its reliance on predefined rules necessitates standardization, resulting in a rigid design space and limited adaptability. To overcome these inherent restrictions, the research integrates complementary tools and techniques that enable more flexible and adaptive automation. Camera vision captures real-world conditions and tracks changes in the environment, while large language models, combined with an agent-based approach, provide reasoning capabilities that interpret variations in products or processes and generate adaptive decision-making strategies. Digital twin simulations validate and predict the outcomes of these variations in a virtual environment, allowing the system to respond proactively and safely by reconciling real-time data with simulation outcomes.

Overall, this work contributes a holistic and scalable automation methodology that unifies design automation, adaptive digital twins, and knowledge-driven reasoning. The results demonstrate how structured engineering knowledge, combined with reasoning and adaptive technologies, enables the development of resilient automation solutions for the increasingly unstructured landscape of future Industry.

Abstract [sv]

Den ökande efterfrågan på kundanpassade produkter, tillsammans med behovet av flexibla, människocentrerade och motståndskraftiga tillverkningssystem, har intensifierat behovet av automatiseringslösningar som kan fungera i dynamiska och ostrukturerade industriella miljöer. Denna avhandling visar hur automatiserings-metoder utvecklas och var de misslyckas i takt med att komplexitet och variation ökar inom design- och produktionsområdena.

Forskningen börjar med att hantera tidskrävande och iterativa tekniska uppgifter genom designautomation. Med hjälp av kunskapsbaserad teknik (KBE) utvecklades automatiserade ramverk för att effektivisera tekniska arbetsflöden och stödja konsekvent beslutsfattande i strukturerade industriella miljöer. Men när fokus utvidgas till verklig produktion skapar den växande komplexiteten och osäkerheten i miljön betydande utmaningar för både design- och produktionsautomation.

Medan KBE ger struktur och konsekvens, kräver dess beroende av fördefinierade regler standardisering, vilket resulterar i ett rigid designutrymme och begränsad anpassningsförmåga. För att övervinna dessa inneboende begränsningar integrerar forskningen kompletterande verktyg och tekniker som möjliggör mer flexibel och adaptiv automatisering. Kameraseende fångar verkliga förhållanden och spårar förändringar i miljön, medan stora språkmodeller, i kombination med en agentbaserad metod, ger resonemangsförmåga som tolkar variationer i produkter eller processer och genererar adaptiva beslutsstrategier. Digitala tvillingsimuleringar validerar och förutsäger resultaten av dessa variationer i en virtuell miljö, vilket gör att systemet kan reagera proaktivt och säkert genom att förena realtidsdata med simuleringsresultat.

Sammantaget bidrar detta arbete med en holistisk och skalbar automationsmetodik som förenar designautomation, adaptiva digitala tvillingar och kunskapsdrivet resonemang. Resultaten visar hur strukturerad ingenjörskunskap, i kombination med resonemang och adaptiva teknologier, möjliggör utveckling av motståndskraftiga automationslösningar för det alltmer ostrukturerade landskapet inom framtidens industri.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2026. , p. 62
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 2505
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
URN: urn:nbn:se:liu:diva-221174DOI: 10.3384/9789181184624ISBN: 9789181184617 (print)ISBN: 9789181184624 (electronic)OAI: oai:DiVA.org:liu-221174DiVA, id: diva2:2037234
Public defence
2026-03-06, ACAS, A-building, Campus Valla, Linköping, 09:15 (English)
Opponent
Supervisors
Available from: 2026-02-10 Created: 2026-02-10 Last updated: 2026-02-11Bibliographically approved
List of papers
1. Multidisciplinary Automation in Design of Turbine Vane Cooling Channels
Open this publication in new window or tab >>Multidisciplinary Automation in Design of Turbine Vane Cooling Channels
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2024 (English)In: International Journal of Turbomachinery, Propulsion and Power, ISSN 2504-186X, Vol. 9, no 1, article id 7Article in journal (Refereed) Published
Abstract [en]

In the quest to enhance the efficiency of gas turbines, there is a growing demand for innovative solutions to optimize high-pressure turbine blade cooling. However, the traditional methods for achieving this optimization are known for their complexity and time-consuming nature. We present an automation framework to streamline the design, meshing, and structural analysis of cooling channels, achieving design automation at both the morphological and topological levels. This framework offers a comprehensive approach for evaluating turbine blade lifetime and enabling multidisciplinary design analyses, emphasizing flexibility in turbine cooling design through high-level CAD templates and knowledge-based engineering. The streamlined automation process, supported by a knowledge base, ensures continuity in both the mesh and structural simulation automations, contributing significantly to advancements in gas turbine technology.

Place, publisher, year, edition, pages
MDPI, 2024
Keywords
multidisciplinary automation, design automation, mesh automation, knowledge-based engineering, turbine vane cooling design
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:liu:diva-201145 (URN)10.3390/ijtpp9010007 (DOI)001192494000001 ()
Funder
Vinnova, 2020-04251
Note

Funding: VINNOVA

Available from: 2024-02-23 Created: 2024-02-23 Last updated: 2026-02-10Bibliographically approved
2. Autofix – Automated Design of Fixtures
Open this publication in new window or tab >>Autofix – Automated Design of Fixtures
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2022 (English)Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents a framework to develop the automated design of fixtures using the combination ofdesign automation (DA), multidisciplinary optimization and robotic simulation. MDO necessitates the useof concurrent and parametric designs which are created by DA and knowledge-based engineering tools. Thisapproach is designed to decrease the time and cost of the fixture design process by increasing the degree ofautomation. AutoFix provides methods and tools for automatically optimizing resource-intensive fixturedesign utilizing digital tools from different disciplines.

Place, publisher, year, edition, pages
Cambridge University Press, 2022
Series
Proceedings of the Design Society, E-ISSN 2732-527X
Keywords
design automation, design optimisation, knowledge-based engineering (KBE), fixtures, robotic simulation
National Category
Other Mechanical Engineering
Identifiers
urn:nbn:se:liu:diva-195445 (URN)10.1017/pds.2022.56 (DOI)2-s2.0-85131360012 (Scopus ID)
Conference
International Design Conference - Design 2022, 23 - 26 May, 2022
Note

his is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives licence (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Available from: 2023-06-20 Created: 2023-06-20 Last updated: 2026-02-10Bibliographically approved
3. Automation of unstructured production environment by applying reinforcement learning
Open this publication in new window or tab >>Automation of unstructured production environment by applying reinforcement learning
2023 (English)In: Frontiers in Manufacturing Technology, E-ISSN 2813-0359, Vol. 3Article in journal (Refereed) Published
Abstract [en]

Implementation of Machine Learning (ML) to improve product and production development processes poses a significant opportunity for manufacturing industries. ML has the capability to calibrate models with considerable adaptability and high accuracy. This capability is specifically promising for applications where classical production automation is too expensive, e.g., for mass customization cases where the production environment is uncertain and unstructured. To cope with the diversity in production systems and working environments, Reinforcement Learning (RL) in combination with lightweight game engines can be used from initial stages of a product and production development process. However, there are multiple challenges such as collecting observations in a virtual environment which can interact similar to a physical environment. This project focuses on setting up RL methodologies to perform path-finding and collision detection in varying environments. One case study is human assembly evaluation method in the automobile industry which is currently manual intensive to investigate digitally. For this case, a mannequin is trained to perform pick and place operations in varying environments and thus automating assembly validation process in early design phases. The next application is path-finding of mobile robots including an articulated arm to perform pick and place operations. This application is expensive to setup with classical methods and thus RL enables an automated approach for this task as well.

Place, publisher, year, edition, pages
Frontiers Media S.A., 2023
Keywords
Reinforcement Learning, Unity Game Engine, Mobile Robot, Mannequin, Production Environment
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
urn:nbn:se:liu:diva-195616 (URN)10.3389/fmtec.2023.1154263 (DOI)
Funder
Vinnova, 2020-05173
Available from: 2023-06-22 Created: 2023-06-22 Last updated: 2026-02-10Bibliographically approved
4. Automation in Unstructured Production Environments Using Isaac Sim: A Flexible Framework for Dynamic Robot Adaptability
Open this publication in new window or tab >>Automation in Unstructured Production Environments Using Isaac Sim: A Flexible Framework for Dynamic Robot Adaptability
2024 (English)In: 57th CIRP Conference on Manufacturing Systems 2024 (CMS 2024) / [ed] Goran Putnik, 2024, Vol. 130, p. 837-846Conference paper, Published paper (Refereed)
Abstract [en]

In response to the growing complexity of industrial automation requirements, this paper introduces a comprehensive framework tailored for the automation of industrial robots within unstructured production environments. The framework, emphasizing on adaptability and flexibility, seamlessly merges cutting-edge GPU-based physics engine, the Isaac Sim from Omniverse NVIDIA, with industrial robots, thereby laying the foundation for the development of a robust and versatile digital twin. This digital shadow serves as a main step towards the realization of digital twin technologies in dynamically evolving production environments, facilitating dynamic decision-making processes powered by real-time virtual environmental data.

Furthermore, this paper show a compelling application scenario to underscore the practical relevance of the proposed framework. Specifically, the application case centers around a hospital test lab, an onsite facility charged with the preparation of tissue samples for subsequent evaluation by medical professionals. Presently, many of the lab’s tasks are performed manually, underscoring the urgent need for increased automation to enhance efficiency and the working environment. The specific task targeted by this paper involves the re-stacking of microscope slides from a slider fixture to a holder in preparation for subsequent operations. The motivation behind the integration of more dynamic behavior into the robotic system stems from the unstructured nature of incoming samples, coupled with deficiencies in the digital information chain, all within the constraints of a cost-sensitive, non-expert setting.

Proving the applicability of this framework in the current test case, it not only enhances efficiency in the hospital test lab scenario but also demonstrates its potential in more advanced applications within the manufacturing field, especially in environments with similar levels of complexity. By removing technical barriers and streamlining the exploration of digital twin applications, this paper contributes to the advancement of automation technologies and sets the stage for future developments in dynamic production environments.

Keywords
Dynamic Production, Digital Twin, Collaborative Robot
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
urn:nbn:se:liu:diva-215844 (URN)10.1016/j.procir.2024.10.173 (DOI)
Conference
57th CIRP Conference on Manufacturing Systems 2024 (CMS 2024)
Funder
Vinnova, 2021-02481
Available from: 2025-06-30 Created: 2025-06-30 Last updated: 2026-02-10
5. Digital Twin-Enabled Adaptive Robotics: Leveraging Large Language Models in Isaac Sim for Unstructured Environments
Open this publication in new window or tab >>Digital Twin-Enabled Adaptive Robotics: Leveraging Large Language Models in Isaac Sim for Unstructured Environments
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2025 (English)In: Machines, E-ISSN 2075-1702, Vol. 13, no 7, article id 620Article in journal (Refereed) Published
Abstract [en]

As industrial automation evolves towards human-centric, adaptable solutions, collaborative robots must overcome challenges in unstructured, dynamic environments. This paper extends our previous work on developing a digital shadow for industrial robots by introducing a comprehensive framework that bridges the gap between physical systems and their virtual counterparts. The proposed framework advances toward a fully functional digital twin by integrating real-time perception and intuitive human–robot interaction capabilities. The framework is applied to a hospital test lab scenario, where a YuMi robot automates the sorting of microscope slides. The system incorporates a RealSense D435i depth camera for environment perception, Isaac Sim for virtual environment synchronization, and a locally hosted large language model (Mistral 7B) for interpreting user voice commands. These components work together to achieve bi-directional synchronization between the physical and digital environments. The framework was evaluated through 20 test runs under varying conditions. A validation study measured the performance of the perception module, simulation, and language interface, with a 60% overall success rate. Additionally, synchronization accuracy between the simulated and physical robot joint movements reached 98.11%, demonstrating strong alignment between the digital and physical systems. By combining local LLM processing, real-time vision, and robot simulation, the approach enables untrained users to interact with collaborative robots in dynamic settings. The results highlight its potential for improving flexibility and usability in industrial automation.

Keywords
Adaptive digital twin; Human-robot collaboration (HRC); Adaptive robotics
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
urn:nbn:se:liu:diva-216601 (URN)10.3390/machines13070620 (DOI)001535521300001 ()2-s2.0-105011624230 (Scopus ID)
Funder
Vinnova, 2021-02481Vinnova, 2023-02674
Available from: 2025-08-18 Created: 2025-08-18 Last updated: 2026-02-10

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