Blar i Institutt for havromsoperasjoner og byggteknikk på forfatter "Hatledal, Lars Ivar"
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A Benchmarking Framework for Control Methods of Maritime Cranes Based on the Functional Mockup Interface
Sanfilippo, Filippo; Hatledal, Lars Ivar; Pettersen, Kristin Ytterstad; Zhang, Houxiang (Journal article, 2017)A benchmark framework for advanced control methods of maritime cranes is presented based on the use of the functional mockup interface. The system integrates different manipulator models, all the corresponding hydraulic ... -
A Language and Platform Independent Co-Simulation Framework Based on the Functional Mock-Up Interface
Hatledal, Lars Ivar; Styve, Arne; Hovland, Geir; Zhang, Houxiang (Journal article; Peer reviewed, 2019)The main goal of the Functional Mock-up Interface (FMI) standard is to allow the sharing of simulation models across tools. To accomplish this, FMI relies on a combination of XML-files and compiled C-code packaged in a zip ... -
A Software Architecture for Simulation and Visualisation based on the Functional Mock-up Interface and Web Technologies
Hatledal, Lars Ivar; Schaathun, Hans Georg; Zhang, Houxiang (Chapter, 2015)This paper presents a software architecture for a collaborative virtual environment (CVE) for simulation and visualisation based on the Functional Mock-up Interface (FMI) for co-simulation and web technologies. FMI has ... -
A Voxel-Based Numerical Method for Computing and Visualising the Workspace of Offshore Cranes
Hatledal, Lars Ivar; Sanfilippo, Filippo; Chu, Yingguang; Zhang, Houxiang (Chapter; Peer reviewed, 2015)Workspace computation and visualisation is one of the most important criteria in offshore crane design in terms of geometry dimensioning, installation feasibility and operational performance evaluation. This paper presents ... -
Adaptive Data-driven Predictor of Ship Maneuvering Motion Under Varying Ocean Environments
Wang, Tongtong; Skulstad, Robert; Kanazawa, Motoyasu; Hatledal, Lars Ivar; Li, Guoyuan; Zhang, Houxiang (Chapter, 2022)Modern marine vessels operate increasingly autonomously, enabled by the strong interaction between data acquisition and analysis. The data-driven technology has been widely applied and significantly benefits maritime ... -
An Object-Oriented Modeling Approach to Virtual Prototyping of Marine Operation Systems Based on Functional Mock-Up Interface Co-Simulation
Chu, Yingguang; Hatledal, Lars Ivar; Æsøy, Vilmar; Ehlers, Sören; Zhang, Houxiang (Journal article; Peer reviewed, 2018)This paper presents an object-oriented modeling (OOM) approach to model development of marine operation systems, specifically the hydraulic systems of marine cranes. Benefited from the rapid development of computation ... -
Co-simulation as a Fundamental Technology for Twin Ships
Hatledal, Lars Ivar; Skulstad, Robert; Li, Guoyuan; Styve, Arne; Zhang, Houxiang (Peer reviewed; Journal article, 2020)The concept of digital twins, characterized by the high fidelity with which they mimic their physical counterpart, provide potential benefits for the next generation of advanced ships. It allows analysis of data and ... -
Co-simulation-based Pre-training of a Ship Trajectory Predictor
Kanazawa, Motoyasu; Hatledal, Lars Ivar; Li, Guoyuan; Zhang, Houxiang (Chapter, 2022)A ship trajectory predictor plays a key role in the predictive decision making of intelligent marine transportation. For better prediction performance, the biggest technical challenge is how we incorporate prior knowledge, ... -
Controlling Kuka Industrial Robots : Flexible Communication Interface JOpenShowVar.
Sanfilippo, Filippo; Hatledal, Lars Ivar; Zhang, Houxiang; Fago, Massimiliano; Pettersen, Kristin Ytterstad (Journal article, 2015)JOpenShowVar is a Java open-source cross-platform communication interface to Kuka industrial robots. This novel interface allows for read-write use of the controlled manipulator variables and data structures. JOpenShowVar, ... -
Coupling of dynamic reaction forces of a heavy load crane and ship motion responses in waves
Chu, Yingguang; Li, Guoyuan; Hatledal, Lars Ivar; Holmeset, Finn Tore; Zhang, Houxiang (Peer reviewed; Journal article, 2021)The conventional approach to dynamic analysis of ship motion response with shipboard operation equipment is usually done by establishing combined equations of motion of the multi-body system. The weakness of such methods ... -
A Digital Twin of the Research Vessel Gunnerus for Lifecycle Services: Outlining Key Technologies
Zhang, Houxiang; Li, Guoyuan; Hatledal, Lars Ivar; Chu, Yingguang; Ellefsen, André Listou; Han, Peihua; Major, Pierre Yann; Skulstad, Robert; Wang, Tongtong; Hildre, Hans Petter (Journal article; Peer reviewed, 2022) -
Effect of Ship Propulsion Retrofit on Maneuverability Research Based on Co-simulation
Wang, Tongtong; Hatledal, Lars Ivar; Kanazawa, Motoyasu; Li, Guoyuan; Zhang, Houxiang (Chapter, 2022)Shipping has been dominating the transportation industry in worldwide trade. During the service life of a vessel, conversions in mid-life often occur for economic or technical purposes. By replacing expired components or ... -
Enabling Python Driven Co-Simulation Models with PythonFMU
Hatledal, Lars Ivar; Collonval, Frederic; Zhang, Houxiang (Chapter, 2020)This paper introduces PythonFMU, an easy to use framework for exporting Python 3.x code as cosimulation compatible models compliant with version 2.0 of the Functional Mock-up Interface (FMI). The framework consists of a ... -
FMI4j: A Software Package for working with Functional Mock-up Units on the Java Virtual Machine
Hatledal, Lars Ivar; Zhang, Houxiang; Styve, Arne; Hovland, Geir (Chapter, 2018)This paper introduces FMI4j, a software package for working with Functional Mock-up Units (FMUs) on the Java Virtual Machine (JVM). FMI4j is written in Kotlin, which is 100% interoperable with Java, and consists of programming ... -
FMU-proxy: A Framework for Distributed Access to Functional Mock-up Units
Hatledal, Lars Ivar; Zhang, Houxiang; Styve, Arne; Hovland, Geir (Chapter, 2019)The main goal of the Functional Mock-up Interface (FMI) standard is to allow simulation models to be shared across tools. To accomplish this, FMI relies on a combination of XML-files and compiled C-code packaged in a zip ... -
Incorporating Approximate Dynamics Into Data-Driven Calibrator: A Representative Model for Ship Maneuvering Prediction
Wang, Tongtong; Li, Guoyuan; Hatledal, Lars Ivar; Skulstad, Robert; Æsøy, Vilmar; Zhang, Houxiang (Peer reviewed; Journal article, 2021)High-fidelity models capable of accurately predicting ship motion are critical for promoting innovation and efficiency in the maritime industry. However, creating an advanced model that comprehensively represents the system ... -
A multiple-output hybrid ship trajectory predictor with consideration for future command assumption
Kanazawa, Motoyasu; Skulstad, Robert; Li, Guoyuan; Hatledal, Lars Ivar; Zhang, Houxiang (Peer reviewed; Journal article, 2021)Onboard sensors contribute to data-driven understanding of complex and nonlinear ship dynamics in real time. By using sensors, precise ship trajectory prediction plays a key role in intelligent collision avoidance. A hybrid ... -
Numerical Study for a Catamaran Gripper-Monopile Mechanism of a Novel Offshore Wind Turbine Assembly Installation Procedure
Hatledal, Lars Ivar; Zhang, Houxiang; Halse, Karl Henning; Hildre, Hans Petter (Chapter; Peer reviewed, 2017)Current methods for installation of offshore wind turbines are all sensitive to the weather conditions and the present cost level of offshore wind power is more than twice the cost of land-based units, increasing with water ... -
A Physics-Data Co-Operative Ship Dynamic Model for a Docking Operation
Kanazawa, Motoyasu; Skulstad, Robert; Wang, Tongtong; Li, Guoyuan; Hatledal, Lars Ivar; Zhang, Houxiang (Journal article; Peer reviewed, 2022)The development of onboard sensors is bringing us to the next level of ship digitalization. Its ultimate goal is to ensure safe & efficient marine operation by ship intelligence. In particular, during a docking operation, ... -
Protocols and Standard for Simulation Co-Simulation – For demanding maritime operations
Hatledal, Lars Ivar (Doctoral theses at NTNU;2021:81, Doctoral thesis, 2021)There is a strong demand for innovation and efficiency within operations, life cycle services, and design of maritime systems. Modern vessels operate increasingly autonomously through strongly interacting sub-systems. These ...