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Venkata, Raghu. C. M.ORCID iD iconorcid.org/0000-0002-1301-7931
Alternative names
Publications (10 of 15) Show all publications
Devadurgam, H., Rajagopal, S. & Munjulury, R. C. (2019). Modeling and Sizing of Conventional and Electrical Environmental Control Systems.
Open this publication in new window or tab >>Modeling and Sizing of Conventional and Electrical Environmental Control Systems
2019 (English)Report (Refereed)
Abstract [en]

Environmental control system holds vital importance as it is responsible for passenger’s ventilation and comfort. This paper presents modelling and sizing of the parameterized model of environmental control systems. Knowledge based engineering application serves as the base for designing and methodology for the environmental control systems. Flexibility in the model enables user to control the size and positioning of the system and also sub-systems  associated with it. Number of passengers serves as the driving input for the environmental control system. A 3-d model gives the exact representation with respect to volume occupied and dependencies on the number of passengers. It also provides a faster method to alter the system to user needs with respect to number of air supply pipes, number of ducts and pipe length. Knowledge based engineering gives the freedom to visualize various options in the conceptual design process.

Publisher
p. 17
Keywords
Environmental Control System (ECS), Conventional ECS and Electrical ECS, RAPID, KBE
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-154775 (URN)
Available from: 2019-03-29 Created: 2019-02-26 Last updated: 2019-04-09Bibliographically approved
Munjulury, R. C., Staack, I., Berry, P. & Krus, P. (2016). A knowledge-based integrated aircraft conceptual design framework. CEAS Aeronautical Journal, 7(1), 95-105
Open this publication in new window or tab >>A knowledge-based integrated aircraft conceptual design framework
2016 (English)In: CEAS Aeronautical Journal, ISSN 1869-5582, 1869-5590, Vol. 7, no 1, p. 95-105Article in journal (Refereed) Published
Abstract [en]

"The conceptual design is the early stage of aircraft design process where results are needed fast, both analytically and visually so that the design can be analyzed and eventually improved in the initial phases. Although there is no necessity for a CAD model from the very beginning of the design process, it can be an added advantage to have the model to get the impression and appearance. Furthermore, this means that a seamless transition into preliminary design is achieved since the CAD model can guardedly be made more detailed. For this purpose, knowledge-based aircraft conceptual design applications Tango (Matlab) and RAPID (CATIA) are being developed at Linköping University. Based on a parametric data definition in XML, this approach allows for a full 3D CAD integration. The one-database approach, also explored by many research organizations, enables the flexible and efficient integration of the different multidisciplinary processes during the whole conceptual design phase. This paper describes the knowledge-based design automated methodology of RAPID, data processing between RAPID and Tango and its application in the courses ‘‘Aircraft conceptual design’’ and ‘‘Aircraft project course’’ at Linköping University. A multifaceted user interface is developed to assist the whole design process."

Place, publisher, year, edition, pages
Springer, 2016
Keywords
Aircraft conceptual design, Knowledge based, XML database
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-126689 (URN)10.1007/s13272-015-0174-z (DOI)
Projects
NFFP5/NFFP6
Available from: 2016-04-01 Created: 2016-04-01 Last updated: 2018-02-07
Parés Prat, A., Borhani Coca, D., Munjulury, R. C. & Berry, P. (2015). Analytical weight estimation of unconventional landing gear designs. In: Proceedings of the Institution of MechanicalEngineers, Part G: : Journal of Aerospace Engineering.
Open this publication in new window or tab >>Analytical weight estimation of unconventional landing gear designs
2015 (English)In: Proceedings of the Institution of MechanicalEngineers, Part G: : Journal of Aerospace Engineering, 2015, , p. 10Conference paper, Published paper (Refereed)
Abstract [en]

Landing gear weight calculations can be carried out using statistical or analytical methods. Statistical methods were used in the past and offered quick group weights, however, they are not capable of computing with accuracy the weight of unconventional landing gears which have special geometries and performances. In this work, landing gear weight is computed using analytical methods. The procedure established by Kraus and Wille is acquired as a baseline so as to create a program able to deal with landing gear weight calculations. This software has been designed to be as much flexible as possible, giving the user the freedom to modify many options and parameters.

Publisher
p. 10
Keywords
Landing gear, Weight Estimation, Analysis
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-119125 (URN)
Available from: 2015-06-09 Created: 2015-06-09 Last updated: 2017-05-30Bibliographically approved
Escolano Andrés, I. & Chaitanya Munjulury, R. (2015). Knowledge-Based Flight Control System Integration in RAPID.
Open this publication in new window or tab >>Knowledge-Based Flight Control System Integration in RAPID
2015 (English)Report (Other academic)
Abstract [en]

Nowadays, aircraft’s design and development processes are not only time-consuming but also incur high economic cost. In addition, system integration is highly a multi-disciplinary design process, which involves a large number of different discipline teams working at the same time and space. The main objective of this work is to investigate in the early design stages to define and integrate flight control system. The purpose is to improve the functionality of an in house produced aircraft conceptual design tool RAPID carried out at the Division of Fluid and Mechatronic Systems, Linköping University.

Publisher
p. 5
Keywords
Flight control system, RAPID, Knowledge Pattern, Parametrization, Hydraulic aircraft systems.
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-113292 (URN)
Available from: 2015-01-15 Created: 2015-01-15 Last updated: 2015-06-02Bibliographically approved
Munjulury, R. C., Berry, P., Melin, T., Amadori, K. & Krus, P. (2015). Knowledge-based Integrated Wing Automation and Optimization for Conceptual Design. In: 16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference: . Paper presented at AVIATION 2015.
Open this publication in new window or tab >>Knowledge-based Integrated Wing Automation and Optimization for Conceptual Design
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2015 (English)In: 16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2015Conference paper, Published paper (Refereed)
Abstract [en]

Contemporary aircraft design and development incurs high costs and consumes a lot of time for research and implementation. To minimize the development cost, an improvement of the conceptual design phase is desirable. A framework to support the initial design space exploration and conceptual design phase is presently being developed at Linköping University. In the aircraft design, the geometry carries a critical, discriminating role since it stores a significant part of the information and the data needed for most investigations. Methodology for design automation of a wing with a detailed description such that the geometry is effectively propagated for further analysis is presented in this paper. Initial weight estimation of the wing is performed by combining the weight penalty method with a sophisticated CAD model. This wing model is used for airfoil shape optimization and later for structural optimization. A methodology for automatic meshing of the geometry for CFD and FEM when the surfaces increase or decrease during the design automation is proposed. The framework combining automation capability with shape and structural optimization will enhance the early design phases of aircraft conceptual design.

Keywords
Wing automation, Knowledge-based, Optimization, CFD, Conceptual design
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-120407 (URN)10.2514/6.2015-3357 (DOI)978-1-62410-368-1 (ISBN)
Conference
AVIATION 2015
Projects
NFFP6
Funder
VINNOVA
Available from: 2015-08-06 Created: 2015-08-06 Last updated: 2019-01-31
Sabaté López, A. & Munjulury, R. C. (2015). Parametric Modeling of Aircraft Fuel Systems integration in RAPID.
Open this publication in new window or tab >>Parametric Modeling of Aircraft Fuel Systems integration in RAPID
2015 (English)Report (Other academic)
Abstract [en]

This work presents knowledge-based parametricdefinition of aircraft fuel systems, oriented to itsuse in conceptual design and integrated into theRAPID design tool. Fuel systems appear earlyin the design process as they are involved in severalfirst estimations. For instance, fuel weight isa significant part of take-off weight and decisivein aircraft sizing and range estimations. Therefore,including fuel systems earlier in the designprocess creates an opportunity to optimize it andobtain better solutions.

Publisher
p. 9
Keywords
Aircraft design, RAPID, Fuel systems, Knowledge-based engineering, CATIA
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-120572 (URN)
Available from: 2015-08-18 Created: 2015-08-17 Last updated: 2017-05-29Bibliographically approved
Diaz Puebla, A. & Munjulury, R. C. (2015). Sizing of actuators for flight control systems and flaps integration in RAPID.
Open this publication in new window or tab >>Sizing of actuators for flight control systems and flaps integration in RAPID
2015 (English)Report (Other academic)
Abstract [en]

The architecture of the flight control system, essentialfor all flight operations, has significantlychanged throughout the years. The first part ofthe work consists of a preliminary sizing modelof an EHA and an EMA. The second part of thework consists of the development of parametricCAD models of different types of flaps and theirintegration in RAPID. This thesis addresses theactuation system architecture of what it is namedas more electric aircraft with electrically poweredactuators. This consists of the development offlexible parametric models of flight control surfaces,being able to adapt to any wing geometryand their automatic integration in RAPID. Furthermore,it represents a first step in the developmentof an automatic tool that allows the user tochoose any possible wing control surface configuration.

Publisher
p. 11
Keywords
EHA, EMA, actuator sizing, flight control surfaces, RAPID, CATIA V5, Knowledge Pattern
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-120619 (URN)
Available from: 2015-08-18 Created: 2015-08-18 Last updated: 2015-09-08Bibliographically approved
Staack, I., Chaitanya Munjulury, R., Melin, T., Abdalla, A. M. & Krus, P. (2014). CONCEPTUAL AIRCRAFT DESIGN MODEL MANAGEMENTDEMONSTRATED ON A 4TH GENERATION FIGHTER. In: : . Paper presented at 29th Congress of the International Council of the Aeronautical Sciences. St. Petersberg, Russia
Open this publication in new window or tab >>CONCEPTUAL AIRCRAFT DESIGN MODEL MANAGEMENTDEMONSTRATED ON A 4TH GENERATION FIGHTER
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2014 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Model management during conceptual aircraftdesign is an important issue. This paper showsthe basic ideas and capabilities of the conceptualaircraft design framework developed atLinköping University with focus on efficient lowfidelity geometry definition. As an example, theanalysis of an F-16 fighter is presented.

Place, publisher, year, edition, pages
St. Petersberg, Russia: , 2014
Keywords
model management, conceptual aircraft design, sensitivity analysis
National Category
Aerospace Engineering
Identifiers
urn:nbn:se:liu:diva-114909 (URN)
Conference
29th Congress of the International Council of the Aeronautical Sciences
Available from: 2015-03-05 Created: 2015-03-05 Last updated: 2015-03-20
Munjulury, V. R. (2014). Knowledge Based Integrated Multidisciplinary Aircraft Conceptual Design. (Licentiate dissertation). Linköping: Linköping University Electronic Press
Open this publication in new window or tab >>Knowledge Based Integrated Multidisciplinary Aircraft Conceptual Design
2014 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

With the ever growing complexity of aircrafts, new tools and eventually methods to use these tools are needed in aircraft conceptual design. To reduce the development cost, an enhancement in the conceptual design is needed.

This thesis presents a knowledge-based aircraft geometry design tool RAPID and the methodology applied in realizing the design. The parameters used to create a geometry need to be exchange between different tools. This is achieved by using a centralized database or onedata concept. One-database will enable creating a less number of cross connections between different tools to exchange data with one another. Different types of aircraft configurations can be obtained with less effort. As RAPID is developed based on relational design, any changes made to the geometric model will update automatically. The geometry model is carefully defined to carry over to the preliminary design.

The validation of RAPID is done by implementing it in different aircraft design courses at Linköping University. In the aircraft project course, RAPID was effectively used and new features were added to the obtained desired design. Knowledge-base is used to realize the design performance for the geometry with an integrated database approach for a multidisciplinary aircraft conceptual design.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2014. p. 52
Series
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1661
Keywords
Knowledge-base, Aircraft, Conceptual Design, CAD, XML Database, Multidisciplinary, Optimization
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-106925 (URN)10.3384/lic.diva-106925 (DOI)978-91-7519-328-1 (ISBN)
Presentation
2014-06-16, ACAS, A-building, Campus Valla, Linköpings universitet, Linköping, 10:15 (English)
Opponent
Supervisors
Available from: 2014-05-27 Created: 2014-05-27 Last updated: 2015-06-02Bibliographically 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
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-1301-7931

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