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Jouannet, Christopher
Publications (10 of 55) Show all publications
Knöös Franzén, L., Staack, I., Krus, P., Jouannet, C. & Amadori, K. (2021). A Breakdown of System of Systems Needs Using Architecture Frameworks, Ontologies and Description Logic Reasoning. Aerospace, 8(4)
Open this publication in new window or tab >>A Breakdown of System of Systems Needs Using Architecture Frameworks, Ontologies and Description Logic Reasoning
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2021 (English)In: Aerospace, E-ISSN 2226-4310, Vol. 8, no 4Article in journal (Refereed) Published
Abstract [en]

Aerospace systems are connected with the operational environment and other systems in general. The focus in aerospace product development is consequently shifting from a singular system perspective to a System-of-Systems (SoS) perspective. This increasing complexity gives rise to new levels of uncertainty that must be understood and managed to produce aerospace solutions for an ever-changing future. This paper presents an approach to using architecture frameworks, and ontologies with description logic reasoning capabilities, to break down SoS needs into required capabilities and functions. The intention of this approach is to provide a consistent way of obtaining the functions to be realized in order to meet the overarching capabilities and needs of an SoS. The breakdown with an architecture framework results in an initial design space representation of functions to be performed. The captured knowledge is then represented in an ontology with description logic reasoning capabilities, which provides a more flexible way to expand and process the initial design space representation obtained from the architecture framework. The proposed approach is ultimately tested in a search and rescue case study, partly based on the operations of the Swedish Maritime Administration. The results show that it is possible to break down SoS needs in a consistent way and that ontology with description logic reasoning can be used to process the captured knowledge to both expand and reduce an available design space representation.

Place, publisher, year, edition, pages
MDPI, 2021
Keywords
system of systems, systems engineering, aerospace systems, architecture framework, ontology, description logic reasoning, search and rescue
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-175765 (URN)10.3390/aerospace8040118 (DOI)000642619100001 ()
Note

Funding: Swedish Innovation Agency (VINNOVA)Vinnova [NFFP7/2017-04838]

Available from: 2021-05-19 Created: 2021-05-19 Last updated: 2023-05-11Bibliographically approved
Schön, S., Marcus, C., Amadori, K. & Jouannet, C. (2021). Integration of Multi-Fidelity Models with Agent-Based Simulation for System of Systems. In: Proceedings of the AIAA Aviation 2021 Forum, Virtual Event, 2nd - 6th August, 2021.: . Paper presented at AIAA AVIATION 2021 FORUM August 2-6, 2021. American Institute of Aeronautics and Astronautics
Open this publication in new window or tab >>Integration of Multi-Fidelity Models with Agent-Based Simulation for System of Systems
2021 (English)In: Proceedings of the AIAA Aviation 2021 Forum, Virtual Event, 2nd - 6th August, 2021., American Institute of Aeronautics and Astronautics , 2021Conference paper, Published paper (Other academic)
Abstract [en]

System of Systems (SoS) are everywhere, either created and directed by an organization or simply emerging to fulfill a need. SoS consist of many independent Constituent Systems (CS) with their own life cycles and behavior. One of the big challenges with studying SoS is building models to support the analysis of these large complex systems. For existent SoS, it may be tempting to use available models from subsequent levels and connect them in a common framework, rather than creating new models tailored for the SoS analysis. Typically, the already existing models often have a high level of fidelity and have been created from a certain point of view to best fit its purpose. This paper shows that a framework with higher fidelity models on Sub-Systems (SS) level will impact the performance on SoS level but also take longer time to converge and thus need more simulations in order for the results to be trusted. With an holistic approach to the development of SoS, we use hierarchical integration of CS and SS models to provide inputs to the simulation on SoS level. Using maritime Search and Rescue (SAR) as a case study, the mission performance of two aircraft searching for a lost life raft through Agent Based Simulation (ABS). Two cases are compared where one of them has a higher fidelity representation of the sensor model. Through the case study it is possible to investigate the impact of model fidelity on the SS level to the simulation results on SoS level. The two cases simulate the same scenario but still show a difference in mission performance. A convergence analysis show that with the the High Fidelity Models (HFM) the simulation takes slightly longer to converge. This paper is the beginning of a multi-fidelity model library that will be used to explore the impact of model fidelity on all the levels of SoS and from that find general methods for choosing model fidelity when analyzing SoS.

Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics, 2021
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-198920 (URN)10.2514/6.2021-2996 (DOI)
Conference
AIAA AVIATION 2021 FORUM August 2-6, 2021
Available from: 2023-11-01 Created: 2023-11-01 Last updated: 2023-11-02
Knöös Franzén, L., Schön, S., Papageorgiou, A., Staack, I., Ölvander, J., Krus, P., . . . Jouannet, C. (2020). A System of Systems Approach for Search and Rescue Missions. In: : . Paper presented at AIAA Scitech 2020 Forum. American Institute of Aeronautics and Astronautics
Open this publication in new window or tab >>A System of Systems Approach for Search and Rescue Missions
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2020 (English)Conference paper, Published paper (Refereed)
Abstract [en]

System-of-Systems Engineering (SoSE) has become a constantly growing field within product development for complex systems. Systems are becoming more and more connected with other systems and the operational environment in general. This takes the development process to new levels of complexity where high degrees of uncertainties are expected due to ever occurring changes in the operational environment, and other external factors such as politics, economy, and technology. This creates a need of being able to understand the influence of changes early in the development process and to facilitate the systems? perseverance. The focus of the development shifts from fulfilling specific requirements, to being able to meet needs and deliver capabilities over time. Additionally, modeling and simulation for complex systems and System-of-Systems (SoS) becomes a valued alternative to the economically prohibited and almost impossible prototype testing. In consideration of this problem, the presented work introduces a method for both modeling and simulation of a SoS. The method uses ontology with description logic reasoning to derive and narrow down a SoS design space which is further analyzed using Agent Based Simulation (ABS). A Search and Rescue (SAR) scenario is used as a case study to test the method. Measures of Effectiveness (MoE), based on the time it takes to find a rescue subject and the cost of doing so, are used to evaluate the SoS performances. The presented method is envisioned to be used early in the development of complex systems and SoS to increase the overall understanding of them.

Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics, 2020
Keywords
Model Based System Engineering, Unified Modeling Language, Web Ontology Language, Extensible Markup Language, Ocean Currents, Helicopters, Air Vehicle, Probability Density Functions, Cyber Physical System
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-175763 (URN)10.2514/6.2020-0455 (DOI)
Conference
AIAA Scitech 2020 Forum
Available from: 2021-05-19 Created: 2021-05-19 Last updated: 2023-11-02Bibliographically approved
Knöös Franzén, L., Staack, I., Jouannet, C. & Krus, P. (2019). An Ontological Approach to System of Systems Engineering in Product Development. In: Dr. Ingo Staack and Prof. Petter Krus (Ed.), Linköping Electronic Conference Proceedings 162 (2019): . Paper presented at Proceedings of the 10th Aerospace Technology Congress (pp. 35-44). Linköping: Linköping University Electronic Press, 162:4
Open this publication in new window or tab >>An Ontological Approach to System of Systems Engineering in Product Development
2019 (English)In: Linköping Electronic Conference Proceedings 162 (2019) / [ed] Dr. Ingo Staack and Prof. Petter Krus, Linköping: Linköping University Electronic Press, 2019, Vol. 162:4, p. 35-44Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents an approach to system-of-systems engineering for product development with the use of ontology. A proposed method for building as well as using ontology to generate and explore system-of-systems design spaces based on identified system-of-system needs is presented. The method is largely built to cover the first levels of related work, where a process for system of systems in the context of product development is introduced. Within this work, it is shown that scenarios for a system-of-systems can be used to identify needs and subsequently the system-of-systems capabilities that fulfils them. The allocation of capabilities to possible constituent systems is used to show the available design space. The proposed method of this paper therefore addresses these initial challenges and provides a framework for approaching the system-of-systems design space creation using ontology. A case study is used to test the method on a fictitious search and rescue scenario based on available resources and information from the Swedish Maritime Administration. The case study shows that a representation of a system-of-systems scenario can be created in an ontology using the method. The ontology provides a representation of the involved entities from the fictitious scenario and their existing relationships. Defined ontology classes containing conditions are used to represent the identified needs for the system-of-systems. The invocation of a description logic reasoner is subsequently used to classify and create an inferred ontology where the available system-of-systems solutions are represented as sub-classes and individuals of the defined classes representing the needs. Finally, several classes representing different possible system-of-systems needs are used to explore the available design space and to identify the most persistent solutions of the case study.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2019
Series
Linköping Electronic Conference Proceedings, ISSN 1650-3686, E-ISSN 1650-3740 ; 162
Keywords
system-of-systems, ontology, description logic reasoning, design space generation
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-175761 (URN)10.3384/ecp19162004 (DOI)978-91-7519-006-8 (ISBN)
Conference
Proceedings of the 10th Aerospace Technology Congress
Available from: 2021-05-19 Created: 2021-05-19 Last updated: 2023-05-11Bibliographically approved
Sobron, A., Lundström, D., Larsson, R., Krus, P. & Jouannet, C. (2018). Methods for efficient flight testing and modelling of remotely piloted aircraft within visual line-of-sight. In: The International Council of the Aeronautical Sciences (Ed.), Proceedings of the 31st Congress of The International Council of the Aeronautical Sciences (ICAS), September 9-14 2018, Belo Horizonte, Brazil.: . Paper presented at 31st Congress of The International Council of the Aeronautical Sciences (ICAS), September 9-14 2018, Belo Horizonte, Brazil.. Bohn: International Council of the Aeronautical Sciences
Open this publication in new window or tab >>Methods for efficient flight testing and modelling of remotely piloted aircraft within visual line-of-sight
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2018 (English)In: Proceedings of the 31st Congress of The International Council of the Aeronautical Sciences (ICAS), September 9-14 2018, Belo Horizonte, Brazil. / [ed] The International Council of the Aeronautical Sciences, Bohn: International Council of the Aeronautical Sciences , 2018Conference paper, Published paper (Refereed)
Abstract [en]

Remotely piloted scaled models not only serve as convenient low-risk flying test-beds but also can provide useful data and increase confidence in an eventual full-scale design. Nevertheless, performing advanced flight tests in a safe and cost-effective manner is often a challenge for organizations with limited resources. A typical scenario is testing within visual line-of-sight at very low altitude, a type of operation that offers major cost advantages at the expense of a reduced available airspace. This paper describes some of the authors' work towards efficient performance evaluation and system identification of fixed-wing, remotely piloted aircraft under these challenging conditions. Results show that certain techniques, manoeuvre automation, and platform-optimised multisine input signals can improve the flight test efficiency and the modelling process. It is also probable that some of the benefits observed here could be extrapolated to flight testing beyond visual line-of-sight or even to full-scale flight testing.

Place, publisher, year, edition, pages
Bohn: International Council of the Aeronautical Sciences, 2018
Keywords
flight testing, system identification, flight mechanics, modelling and simulation, RPAS
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-155052 (URN)2-s2.0-85060460933 (Scopus ID)978-3-932182-88-4 (ISBN)
Conference
31st Congress of The International Council of the Aeronautical Sciences (ICAS), September 9-14 2018, Belo Horizonte, Brazil.
Projects
MSDEMO
Available from: 2019-03-11 Created: 2019-03-11 Last updated: 2021-08-20Bibliographically approved
Papageorgiou, A., Amadori, K., Jouannet, C. & Ölvander, J. (2018). Multidisciplinary Optimization of Unmanned Aircraft in a System of Systems Context. In: 31st Congress of The International Council of the Aeronautical Sciences (ICAS), September 9-14 2018, Belo Horizonte, Brazil.: . Paper presented at 31th Congress of the International Council of the Aeronautical Sciences (ICAS) 2018 - Belo Horizonte, Brazil, September 9-14, 2018.
Open this publication in new window or tab >>Multidisciplinary Optimization of Unmanned Aircraft in a System of Systems Context
2018 (English)In: 31st Congress of The International Council of the Aeronautical Sciences (ICAS), September 9-14 2018, Belo Horizonte, Brazil., 2018Conference paper, Published paper (Other academic)
Abstract [en]

This paper explores the use of Multidisciplinary Design Optimization (MDO) in the development of Unmanned Aerial Vehicles (UAVs) when the requirements include a collaboration in a System of Systems (SoS) environment. In this work, the framework considers models that can capture the mission, stealth, and surveillance performance of each aircraft, while at the same time, a dedicated simulation module assesses the total cooperation effect on a given operational scenario. The resulting mixed continuous and integer variable problem is decomposed with a multi-level architecture, and in particular, it is treated as a fleet allocation problem that includes a nested optimization routine for sizing a “yet-to-be-designed” aircraft. Overall, the models and the framework are evaluated through a series of optimization runs, and the obtained Pareto front is compared with the results from a traditional aircraft mission planning method in order to illustrate the benefits of this SoS approach in the design of UAVs.

Keywords
MDO, UAV, SoS
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-155047 (URN)978-3-932182-88-4 (ISBN)
Conference
31th Congress of the International Council of the Aeronautical Sciences (ICAS) 2018 - Belo Horizonte, Brazil, September 9-14, 2018
Available from: 2019-03-11 Created: 2019-03-11 Last updated: 2021-08-24Bibliographically approved
Jouannet, C., Lundström, D., Krus, P., Sobron, A., Annes da Silva, R. G., Catalano, F. & Greco, P. (2017). Aerodynamic database of a subscale demonstrator. In: 35th AIAA Applied Aerodynamics Conference: . Paper presented at 35th AIAA Applied Aerodynamics Conference, 5-9 June 2017, Denver, Colorado, USA. Reston, VA, USA, Article ID 2017-4075.
Open this publication in new window or tab >>Aerodynamic database of a subscale demonstrator
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2017 (English)In: 35th AIAA Applied Aerodynamics Conference, Reston, VA, USA, 2017, article id 2017-4075Conference paper, Published paper (Refereed)
Abstract [en]

This paper reports the current status of a joint Swedish-Brazilian research project aiming at exploring sub scale flight testing. A 13% scale fighter aircraft is used as a test bench for developing methods and procedures for data acquisition. This paper will present an aerodynamic database as a partial result of the collaborative project.

Place, publisher, year, edition, pages
Reston, VA, USA: , 2017
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-173295 (URN)10.2514/6.2017-4075 (DOI)
Conference
35th AIAA Applied Aerodynamics Conference, 5-9 June 2017, Denver, Colorado, USA
Available from: 2021-02-12 Created: 2021-02-12 Last updated: 2023-09-22Bibliographically approved
Sobron, A., Lundström, D., Krus, P., Jouannet, C. & Sandoval Goez, L. C. (2017). Flight test design for remotely-piloted aircraft in confined airspace. In: The Council of European Aerospace Societies (Ed.), 6th CEAS Air and Space Conference, Aerospace Europe, 16-20 October, 2017, Bucharest, Romania.: . Paper presented at 6th CEAS Air and Space Conference, Aerospace Europe, 16-20 October, 2017, Bucharest, Romania.. Brussels
Open this publication in new window or tab >>Flight test design for remotely-piloted aircraft in confined airspace
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2017 (English)In: 6th CEAS Air and Space Conference, Aerospace Europe, 16-20 October, 2017, Bucharest, Romania. / [ed] The Council of European Aerospace Societies, Brussels, 2017Conference paper, Published paper (Refereed)
Abstract [en]

Thispaper presents various techniques and procedures that aim to simplify flighttesting of fixed-wing, remotely-piloted aircraft with the purposes ofperformance evaluation and system identification. These methods have beenspecifically developed for flight within visual line-of-sight, a type ofoperation that limits the available airspace severely but offers major costadvantages considering the current regulations for unmanned flight in mostWestern countries.

Place, publisher, year, edition, pages
Brussels: , 2017
Keywords
flight testing, visual line-of-sight, UAS, data acquisition, flight dynamics
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-155054 (URN)
Conference
6th CEAS Air and Space Conference, Aerospace Europe, 16-20 October, 2017, Bucharest, Romania.
Projects
MSDEMO
Available from: 2019-03-11 Created: 2019-03-11 Last updated: 2019-03-22Bibliographically approved
Munjulury, R. C., Staack, I., Abdalla, A. M., Melin, T., Jouannet, C. & Krus, P. (2014). Knowledge-based design for future combat aircraft concepts. In: : . Paper presented at 29th Congress of the International Council of the Aeronautical Sciences, St. Petersburg, Russia. St. Peterberg
Open this publication in new window or tab >>Knowledge-based design for future combat aircraft concepts
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2014 (English)Conference paper, Published paper (Refereed)
Abstract [en]

A new fighter aircraft will most likely be acollaborative project. In this study conceptualknowledge-based design is demonstrated, usingmodels of comparable fidelity for sizing, geometrydesign, aerodynamic analysis and system simulationfor aircraft conceptual design. A newgeneration fighter is likely to involve advancedcontrol concept where an assessment of feasibilitythrough simulation is needed already atthe conceptual stage. This co-design leads to adeeper understanding of the trade-offs involved.In this paper a study for a future combat aircraftis made. Conceptual knowledge-based design isdemonstrated by optimizing for a design mission,including a super-cruise segment.

Place, publisher, year, edition, pages
St. Peterberg: , 2014
Keywords
Conceptual design, Aircraft design, Engine design, Knowledge-based
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-114902 (URN)
Conference
29th Congress of the International Council of the Aeronautical Sciences, St. Petersburg, Russia
Projects
NFFP5/NFFP6
Available from: 2015-03-05 Created: 2015-03-05 Last updated: 2017-05-30Bibliographically approved
Jouannet, C., Lundström, D., Melin, T. & Berry, P. (2013). Design and Flight Testing of a Solar Powered Aircraft, a Student Challenge. In: : . Paper presented at 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013; Grapevine, TX; United States. American Institute of Aeronautics and Astronautics
Open this publication in new window or tab >>Design and Flight Testing of a Solar Powered Aircraft, a Student Challenge
2013 (English)Conference paper, Published paper (Other academic)
Abstract [en]

The presented work considers designing, building and flight testing a solar poweraircraft as a student project. The goal is to allow student to participate in an aircraft projectfrom design to flight test in order to acquire aircraft design knowledge from theoretical andpractical means. A first theoretical part consists of creating a sizing program for studyingdifferent concepts. Then the gathered knowledge will result in the realization of a flyingdemonstrator. This was realized during a student project over a 5 month period

Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics, 2013
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-88324 (URN)10.2514/6.2013-942 (DOI)978-1-62410-181-6 (ISBN)
Conference
51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013; Grapevine, TX; United States
Available from: 2013-01-31 Created: 2013-01-31 Last updated: 2014-12-05
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