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Jouannet, Christopher
Publications (10 of 50) Show all publications
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
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, 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: , 2018
Keywords
flight testing, system identification, flight mechanics, modelling and simulation, RPAS
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-155052 (URN)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: 2019-03-22Bibliographically approved
Papageorgiou, A., Amadori, K., Jouannet, C. & Ölvander, J. (2018). Multidisciplinary Optimization of Unmanned Aircraft in a System of Systems Context. In: : . 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)Conference 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: 2019-03-22Bibliographically 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
Melin, T. & Jouannet, C. (2013). Wing profile performance variations influenced by manufacturing tolerances. In: : . Paper presented at 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013; Grapevine, TX; United States.
Open this publication in new window or tab >>Wing profile performance variations influenced by manufacturing tolerances
2013 (English)Conference paper, Published paper (Other academic)
Abstract [en]

The sensitivity of wing profile performance metrics as a function of manufacturing tolerances and operational environment influence was studied using a numerical simulation. By employing a Monte-Carlo approach of varying the geometrical properties of a set of wing profiles, the sensitivity and statistical response was found, which in turn gives an indication towards both the most critical geometrical features and to which airfoil is the most robust with respect to constructions errors and operational fouling.

National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-88323 (URN)10.2514/6.2013-633 (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
Projects
NFFP5
Available from: 2013-01-31 Created: 2013-01-31 Last updated: 2014-12-04
Staack, I., Chaitanya Manjula, R., Berry, P., Melin, T., Amadori, K., Jouannet, C., . . . Krus, P. (2012). Parametric Aircraft Conceptual Design Space. In: Prceedings of the 28th International Congress of the Aeronautical Sciences. Paper presented at 28th Congress of the International Council of the Aeronautical Sciences (ICAS 2012), 23-28 September 2012, Brisbane, Australia.
Open this publication in new window or tab >>Parametric Aircraft Conceptual Design Space
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2012 (English)In: Prceedings of the 28th International Congress of the Aeronautical Sciences, 2012Conference paper, Oral presentation only (Other academic)
Abstract [en]

This paper presents the development of a design framework for the initial conceptual design phase. The focus in this project is on a flexible database in XML format, together with close integration of automated CAD, and other tools, which allows the developed geometry to be used directly in the subsequent preliminary design phase. The database and the geometry are also described and an overview is given of included tools like aerodynamic analysis and weight estimation.

Keywords
aircraft conceptual design, parametric modeling, sizing, XML database
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-86541 (URN)
Conference
28th Congress of the International Council of the Aeronautical Sciences (ICAS 2012), 23-28 September 2012, Brisbane, Australia
Available from: 2013-01-15 Created: 2012-12-18 Last updated: 2015-06-02Bibliographically approved
Jouannet, C., Berry, P., Melin, T., Amadori, K., Lundström, D. & Staack, I. (2012). Subscale flight testing used in conceptual design. AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY, 84(3), 192-199
Open this publication in new window or tab >>Subscale flight testing used in conceptual design
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2012 (English)In: AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY, ISSN 1748-8842, Vol. 84, no 3, p. 192-199Article in journal (Refereed) Published
Abstract [en]

Purpose - The purpose of this paper is to present the latest subscale demonstrator aircraft developed at Linkoping University. It has been built as part of a study initiated by the Swedish Material Board (FMV) on a Generic Future Fighter aircraft. The paper will cover different aspects of the performed work: from paper study realised by SAAB to the first flight of the scaled demonstrator. The intention of the paper is to describe what has been realised and explain how the work is may be used to fit within aircraft conceptual design. Design/methodology/approach - The approach has been to address the challenges proposed by the customer of the demonstrator, how to design, manufacture and operate a scaled demonstrator of an aircraft study in conceptual design within five months. Similar research projects have been reviewed in order to perform the current work. Findings - The results obtained so far have led to new questions. In particular, the project indicated that more research is needed within the area of subscale flight testing for usage in aircraft conceptual design, since a scaled demonstrator is likely to answer some questions but will probably open up new ones. Research limitations/implications - The current research is just in its infancy and does not bring any final conclusion but does, however, offer several guidelines for future works. Since the aircraft study was an early phase concept study, not much data are available for validation or comparison. Therefore, the paper is not presenting new methods or general conclusions. Practical implications - Results from a conceptual aircraft study and a realisation of a scaled prototype are presented, which show that scaled flight testing may be used with some restriction in conceptual design. Originality/value - The value of this paper is to show that universities can be involved in prototype development and can work in close collaboration with industries to address issues and solutions within aircraft conceptual design.

Place, publisher, year, edition, pages
EMERALD GROUP PUBLISHING LIMITED, 2012
Keywords
Aircraft; Design; Aerodynamics; Subscale flight testing; Conceptual design; Prototype; Demonstrator
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-79714 (URN)10.1108/00022661211222058 (DOI)000305871700008 ()
Available from: 2012-08-13 Created: 2012-08-13 Last updated: 2012-10-17Bibliographically approved
Jouannet, C., Lundström, D., Amadori, K. & Berry, P. (2010). Design and Flight Testing of an ECO-Sport Aircraft. In: : . Paper presented at 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Orlando, Florida, Jan. 4-7, 2010. American Institute of Aeronautics and Astronautics
Open this publication in new window or tab >>Design and Flight Testing of an ECO-Sport Aircraft
2010 (English)Conference paper, Published paper (Other academic)
Abstract [en]

The presented work is centered on different concept studies for “greener” sport aircraft. The goal is to show the possibility to manufacture a sport aircraft based on different environmental friendly propulsion systems. A first theoretical part consists of creating a sizing program for studying different concepts. Then the gathered knowledge will result in the realization of two flying down-scaled demonstrators. This study was realized during a student project over a 5 month period.

Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics, 2010
Keywords
Green aircraft, conceptual design
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:liu:diva-62591 (URN)10.2514/6.2010-1206 (DOI)978-1-61738-422-6 (ISBN)
Conference
48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Orlando, Florida, Jan. 4-7, 2010
Funder
VINNOVA
Available from: 2010-11-30 Created: 2010-11-30 Last updated: 2016-05-11Bibliographically approved
Amadori, K., Jouannet, C. & Berry, P. (2010). Development of a subscale flight testing platform for a generic future fighter. Paper presented at 27TH INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES - ICAS 2010.
Open this publication in new window or tab >>Development of a subscale flight testing platform for a generic future fighter
2010 (English)Conference paper, Published paper (Refereed)
Abstract [en]

One branch of the current research in aircraft design at Linköping University is focused on fast concept evaluation in early design stages. This covers multidisciplinary optimization using tools of different level of complexity and low-cost subscale flight testing. In some cases a flight test will provide more answers than several computations ever could. In order to achieve this goal a methodology is required to allow fast creation of subscale flying concepts and to obtain as much reliable information as possible from the tests. The methodology is currently being developed. One important part of it is the scaling methodology and the imposed requirements on manufacturing. The present paper presents the latest subscale demonstrator from Linköping University that has been built as part of the study initiated by the Swedish Material Board on a Generic Future Fighter aircraft.

Keywords
subscale, demonstrator, flight testing
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-62594 (URN)
Conference
27TH INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES - ICAS 2010
Available from: 2011-11-10 Created: 2010-11-30 Last updated: 2011-12-16Bibliographically approved
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