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Dasari, Siva KrishnaORCID iD iconorcid.org/0000-0002-3311-2530
Publications (5 of 5) Show all publications
Bertoni, A., Hallstedt, S., Dasari, S. K. & Andersson, P. (2019). Integration of Value and Sustainability Assessment in Design Space Exploration by Machine Learning: An Aerospace Application. Design Science
Open this publication in new window or tab >>Integration of Value and Sustainability Assessment in Design Space Exploration by Machine Learning: An Aerospace Application
2019 (English)In: Design ScienceArticle in journal (Refereed) Submitted
National Category
Mechanical Engineering Computer Sciences
Identifiers
urn:nbn:se:bth-17851 (URN)
Available from: 2019-04-25 Created: 2019-04-25 Last updated: 2019-05-21Bibliographically approved
Dasari, S. K., Cheddad, A. & Andersson, P. (2019). Random Forest Surrogate Models to Support Design Space Exploration in Aerospace Use-case. In: IFIP Advances in Information and Communication Technology: . Paper presented at 15th International Conference on Artificial Intelligence Applications and Innovations (AIAI'19)At: Crete, Greece. Springer-Verlag New York, 559
Open this publication in new window or tab >>Random Forest Surrogate Models to Support Design Space Exploration in Aerospace Use-case
2019 (English)In: IFIP Advances in Information and Communication Technology, Springer-Verlag New York, 2019, Vol. 559Conference paper, Published paper (Refereed)
Abstract [en]

In engineering, design analyses of complex products rely on computer simulated experiments. However, high-fidelity simulations can take significant time to compute. It is impractical to explore design space by only conducting simulations because of time constraints. Hence, surrogate modelling is used to approximate the original simulations. Since simulations are expensive to conduct, generally, the sample size is limited in aerospace engineering applications. This limited sample size, and also non-linearity and high dimensionality of data make it difficult to generate accurate and robust surrogate models. The aim of this paper is to explore the applicability of Random Forests (RF) to construct surrogate models to support design space exploration. RF generates meta-models or ensembles of decision trees, and it is capable of fitting highly non-linear data given quite small samples. To investigate the applicability of RF, this paper presents an approach to construct surrogate models using RF. This approach includes hyperparameter tuning to improve the performance of the RF's model, to extract design parameters' importance and \textit{if-then} rules from the RF's models for better understanding of design space. To demonstrate the approach using RF, quantitative experiments are conducted with datasets of Turbine Rear Structure use-case from an aerospace industry and results are presented.

Place, publisher, year, edition, pages
Springer-Verlag New York, 2019
Series
IFIP Advances in Information and Communication Technology ; 559
Keywords
machine learning, random forests, hyperparameter tuning, surrogate model, meta-models, engineering design, aerospace
National Category
Computer Sciences
Identifiers
urn:nbn:se:bth-17743 (URN)10.1007/978-3-030-19823-7_45 (DOI)978-3-030-19822-0 (ISBN)
Conference
15th International Conference on Artificial Intelligence Applications and Innovations (AIAI'19)At: Crete, Greece
Available from: 2019-03-27 Created: 2019-03-27 Last updated: 2019-06-13Bibliographically approved
Bertoni, A., Dasari, S. K., Hallstedt, S. & Petter, A. (2018). Model-based decision support for value and sustainability assessment: Applying machine learning in aerospace product development. In: Marjanović D., Štorga M., Škec S., Bojčetić N., Pavković N (Ed.), DS92: Proceedings of the DESIGN 2018 15th International Design Conference: . Paper presented at 15th International Design Conference, Dubrovnik (pp. 2585-2596). The Design Society, 6
Open this publication in new window or tab >>Model-based decision support for value and sustainability assessment: Applying machine learning in aerospace product development
2018 (English)In: DS92: Proceedings of the DESIGN 2018 15th International Design Conference / [ed] Marjanović D., Štorga M., Škec S., Bojčetić N., Pavković N, The Design Society, 2018, Vol. 6, p. 2585-2596Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents a prescriptive approach toward the integration of value and sustainability models in an automated decision support environment enabled by machine learning (ML). The approach allows the concurrent multidimensional analysis of design cases complementing mechanical simulation results with value and sustainability assessment. ML allows to deal with both qualitative and quantitative data and to create surrogate models for quicker design space exploration. The approach has been developed and preliminary implemented in collaboration with a major aerospace sub-system manufacturer.

Place, publisher, year, edition, pages
The Design Society, 2018
Keywords
decision making, value driven design, big data analysis, sustainable design, design space exploration
National Category
Engineering and Technology Mechanical Engineering
Identifiers
urn:nbn:se:bth-16232 (URN)10.21278/idc.2018.0437 (DOI)9789537738594 (ISBN)
Conference
15th International Design Conference, Dubrovnik
Projects
Model Driven Development and Decision Support
Funder
Knowledge Foundation
Available from: 2018-05-29 Created: 2018-05-29 Last updated: 2018-10-31Bibliographically approved
Dasari, S. K., Lavesson, N., Andersson, P. & Persson, M. (2015). Tree-Based Response Surface Analysis. In: : . Paper presented at The International Workshop on Machine learning, Optimization and big Data (MOD 2015), Taormina - Sicily, Italy (pp. 118-129). Springer, 9432
Open this publication in new window or tab >>Tree-Based Response Surface Analysis
2015 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Computer-simulated experiments have become a cost effective way for engineers to replace real experiments in the area of product development. However, one single computer-simulated experiment can still take a significant amount of time. Hence, in order to minimize the amount of simulations needed to investigate a certain design space, different approaches within the design of experiments area are used. One of the used approaches is to minimize the time consumption and simulations for design space exploration through response surface modeling. The traditional methods used for this purpose are linear regression, quadratic curve fitting and support vector machines. This paper analyses and compares the performance of four machine learning methods for the regression problem of response surface modeling. The four methods are linear regression, support vector machines, M5P and random forests. Experiments are conducted to compare the performance of tree models (M5P and random forests) with the performance of non-tree models (support vector machines and linear regression) on data that is typical for concept evaluation within the aerospace industry. The main finding is that comprehensible models (the tree models) perform at least as well as or better than traditional black-box models (the non-tree models). The first observation of this study is that engineers understand the functional behavior, and the relationship between inputs and outputs, for the concept selection tasks by using comprehensible models. The second observation is that engineers can also increase their knowledge about design concepts, and they can reduce the time for planning and conducting future experiments.

Place, publisher, year, edition, pages
Springer, 2015. p. 12
Series
Lecture Notes in Computer Science, ISSN 0302-9743 ; 9432
Keywords
Machine learning, Regression, Surrogate model, Response surface model
National Category
Computer Sciences
Identifiers
urn:nbn:se:bth-11442 (URN)10.1007/978-3-319-27926-8_11 (DOI)978-3-319-27925-1 (ISBN)
Conference
The International Workshop on Machine learning, Optimization and big Data (MOD 2015), Taormina - Sicily, Italy
Funder
Knowledge Foundation
Available from: 2016-01-19 Created: 2016-01-19 Last updated: 2019-04-25Bibliographically approved
Dasari, S. K., Cheddad, A. & Andersson, P. Predictive Modelling to Support Sensitivity Analysis for Robust Design in Aerospace Engineering.
Open this publication in new window or tab >>Predictive Modelling to Support Sensitivity Analysis for Robust Design in Aerospace Engineering
(English)In: Article in journal (Refereed) Submitted
National Category
Computer Sciences
Identifiers
urn:nbn:se:bth-17848 (URN)
Available from: 2019-04-25 Created: 2019-04-25 Last updated: 2019-05-21Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-3311-2530

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