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World modeling for autonomous wheel loaders
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik. Komatsu Ltd., Akasaka, Minato-ku, Tokyo, Japan. (Digital Physics)
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik. (Digital Physics)
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för datavetenskap. Department of Mathematics and Computer Science, Karlstad University, Karlstad, Sweden.ORCID-id: 0000-0001-8704-9584
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik. Algoryx Simulation AB, Umeå, Sweden. (Digital Physics)ORCID-id: 0000-0002-0787-4988
2024 (Engelska)Ingår i: Automation, ISSN 2673-4052, Vol. 5, nr 3, s. 259-281Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This paper presents a method for learning world models for wheel loaders performing automatic loading actions on a pile of soil. Data-driven models were learned to output the resulting pile state, loaded mass, time, and work for a single loading cycle given inputs that include a heightmap of the initial pile shape and action parameters for an automatic bucket-filling controller. Long-horizon planning of sequential loading in a dynamically changing environment is thus enabled as repeated model inference. The models, consisting of deep neural networks, were trained on data from a 3D multibody dynamics simulation of over 10,000 random loading actions in gravel piles of different shapes. The accuracy and inference time for predicting the loading performance and the resulting pile state were, on average, 95% in 1.21.2 ms and 97% in 4.54.5 ms, respectively. Long-horizon predictions were found feasible over 40 sequential loading actions.

Ort, förlag, år, upplaga, sidor
MDPI, 2024. Vol. 5, nr 3, s. 259-281
Nyckelord [en]
wheel loader, earthmoving, automation, bucket-filling, world modeling, deep learning, multibody simulation
Nationell ämneskategori
Robotik och automation Datorgrafik och datorseende Annan fysik
Forskningsämne
fysik; reglerteknik
Identifikatorer
URN: urn:nbn:se:umu:diva-227746DOI: 10.3390/automation5030016ISI: 001323274900001Scopus ID: 2-s2.0-85205125062OAI: oai:DiVA.org:umu-227746DiVA, id: diva2:1882767
Forskningsfinansiär
Wallenberg AI, Autonomous Systems and Software Program (WASP)Tillgänglig från: 2024-07-07 Skapad: 2024-07-07 Senast uppdaterad: 2025-02-05Bibliografiskt granskad
Ingår i avhandling
1. High-performance autonomous wheel loading: a computational approach
Öppna denna publikation i ny flik eller fönster >>High-performance autonomous wheel loading: a computational approach
2025 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Alternativ titel[sv]
Högpresterande autonom hjullastning : en beräkningsmetod
Abstract [en]

Smart and autonomous earthmoving equipment enhances energy efficiency,productivity, and safety at construction sites and mines. The innovations provide means to reach high-set sustainability goals and be profitable despite increasing labor shortages. In addition, recent technological breakthroughs in artificial intelligence highlight the potential of superhuman capabilities to further enhance operations. This thesis presents a computational approach to end-to-end optimization of autonomous wheel loaders operating in a dynamic environment. Wheel loaders are mainly used for repeatedly loading material and carrying it to load receivers in quarries and mines. The difficulty lies in that each loading action alters the state of the material pile. The resulting state affects the possible outcomes of the subsequent loading process and, ultimately, the total performance. Thus, the challenge is to achieve both autonomous and high-performance wheel loading over a sequence of tasks. Achieving this requires the ability to predict future outcomes and account for the cumulative effect of loading actions. The thesis constructs a real-time wheel loader simulator, develops world models for sequential loading actions with evolving pile states, formulates the end-to-end optimization problem, and introduces a look-ahead tree search method to solve the problem. These contributions provide insights into utilizing physics-based simulation in combination with machine learning to further improve sustainability in mining and construction.

Ort, förlag, år, upplaga, sidor
Umeå: Umeå University, 2025. s. 31
Nyckelord
Earthmoving, Automation, Wheel loader, Bucket-filling, Multibody and soil dynamics, Realtime simulation, Sim-to-real gap, World modeling, Deep learning, Optimization
Nationell ämneskategori
Datavetenskap (datalogi)
Forskningsämne
datalogi
Identifikatorer
urn:nbn:se:umu:diva-233090 (URN)978-91-8070-567-7 (ISBN)978-91-8070-568-4 (ISBN)
Disputation
2025-01-24, MIT.A.121, Umeå, 09:00 (Engelska)
Opponent
Handledare
Tillgänglig från: 2025-01-07 Skapad: 2024-12-20 Senast uppdaterad: 2025-01-07Bibliografiskt granskad

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Aoshima, KojiFälldin, ArvidWadbro, EddieServin, Martin

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