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Conference Papers

D. Ivaldi, Secco, N. R., Chen, S., Hwang, J. T., and Martins, J. R. R. A., “Aerodynamic Shape Optimization of a Truss-Braced-Wing Aircraft”, in 16th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2015.

J. T. Hwang and Martins, J. R. R. A., “Allocation-mission-design optimization of next-generation aircraft using a parallel computational framework”, in 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2016.

Hwang2016.pdf (1.29 MB)

J. S. Gray, Hearn, T. A., Moore, K. T., Hwang, J. T., Martins, J. R. R. A., and Ning, A., “Automatic Evaluation of Multidisciplinary Derivatives Using a Graph-Based Problem Formulation in OpenMDAO”, in Proceedings of the 15th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, Atlanta, GA, 2014.

Gray-MAO-2014.pdf (4.08 MB)

S. S. Chauhan, Hwang, J. T., and Martins, J. R. R. A., “Benchmarking Approaches for the Multidisciplinary Analysis of Complex Systems Using a Taylor Series-Based Scalable Problem”, in 12th World Congress of Structural and Multidisciplinary Optimization (WCSMO12), Braunschweig, Germany, 2018, pp. 98–116.

wcsmo12_paper.pdf (556.91 KB)

J. P. Jasa, Hwang, J. T., and Martins, J. R. R. A., “Design and Trajectory Optimization of a Morphing Wing Aircraft”, in 2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Kissimmee, FL, 2018.

Jasa_morphing_mission_SciTech_submitted.pdf (878.01 KB)

J. T. Hwang and Martins, J. R. R. A., “A Dynamic Parametrization Scheme for Shape Optimization Using Quasi-Newton Methods”, in Proceedings of the 50th AIAA Aerospace Sciences Meeting, Nashville, TN, 2012.

Hwang2012a.pdf (885.22 KB)

J. T. Hwang and Martins, J. R. R. A., “GeoMACH: Geometry-Centric MDAO of Aircraft Configurations with High Fidelity”, in Proceedings of the 14th AIAA/ISSMO Multidisciplinary Analysis Optimization Conference, Indianapolis, IN, 2012.

Hwang2012c.pdf (8.6 MB)

J. T. Hwang, Kenway, G. K. W., and Martins, J. R. R. A., “Geometry and Structural Modeling for High-Fidelity Aircraft Conceptual Design Optimization”, in Proceedings of the 15th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, Atlanta, GA, 2014.

Hwang-MAO-2014.pdf (14.68 MB)

T. R. Brooks, Hwang, J. T., Kennedy, G. J., and Martins, J. R. R. A., “High-fidelity Structural Optimization of a Tow-Steered Composite Wing”, in 11th World Congress on Structural and Multidisciplinary Optimization, Sydney, Australia, 2015.

wcsmo-2015-paper.pdf (915.44 KB)

J. T. Hwang, Lee, D. Y., Cutler, J. W., and Martins, J. R. R. A., “Large-Scale MDO of a Small Satellite using a Novel Framework for the Solution of Coupled Systems and their Derivatives”, in Proceedings of the 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Boston, MA, 2013.

J. T. Hwang, Waas, A. M., and Martins, J. R. R. A., “Micromechanical Modeling and Design Optimization of 2-D Triaxial Braided Composites”, in Proceedings of the 50th AIAA Aerospace Sciences Meeting, Nashville, TN, 2012.

Hwang2012b.pdf (396.94 KB)

S. Roy, Moore, K. T., Hwang, J. T., Gray, J. S., Crossley, W. A., and Martins, J. R. R. A., “A Mixed Integer Efficient Global Optimization Algorithm for the Simultaneous Aircraft Allocation-Mission-Design Problem”, in Proceeding of the 58th AIAA Structures, Structural Dynamics, and Materials Conference, 2017.

J. Y. Kao, Hwang, J. T., Martins, J. R. R. A., Gray, J. S., and Moore, K. T., “A modular adjoint approach to aircraft mission analysis and optimization”, in 56th AIAA SDM Conference, Kissimmee, FL, 2015.

Kao2015a.pdf (611.01 KB)

J. T. Hwang and Martins, J. R. R. A., “Parallel allocation-mission optimization of a 128-route network”, in 17th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, Dallas, TX, 2015.

Paper.pdf (722.17 KB)

J. R. R. A. Martins and Hwang, J. T., “Review and Unification of Methods for Computing Derivatives of Multidisciplinary Systems”, in In Proceedings of the 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, HI, 2012.

J. T. Hwang, Roy, S., Kao, J. Y., Martins, J. R. R. A., and Crossley, W. A., “Simultaneous aircraft allocation and mission optimization using a modular adjoint approach”, in 56th AIAA SDM Conference, Kissimmee, FL, 2015.

Hwang2015a.pdf (330.5 KB)

Journal Articles

S. S. Chauhan, Hwang, J. T., and Martins, J. R. R. A., “An automated selection algorithm for nonlinear solvers in MDO”, Structural and Multidisciplinary Optimization, 2018.

preprint_for_mdolab_auto_mda_paper.pdf (1.07 MB)

J. T. Hwang and Martins, J. R. R. A., “A computational architecture for coupling heterogeneous numerical models and computing coupled derivatives”, ACM TOMS, vol. 44, no. 4, 2018.

paper_mdolab.pdf (986.89 KB)

J. T. Hwang and Martins, J. R. R. A., “A fast-prediction surrogate model for large datasets”, Aerospace Science and Technology, vol. 75, p. 74--87, 2018.

paper_mdolab.pdf (660.18 KB)

J. T. Hwang, Jasa, J. P., and Martins, J. R. R. A., “High-fidelity design-allocation optimization of a commercial aircraft maximizing airline profit”, Journal of Aircraft, 2019.

hwang_AMD_preprint.pdf (4.1 MB)

J. T. Hwang, Lee, D. Y., Cutler, J. W., and Martins, J. R. R. A., “Large-Scale Multidisciplinary Optimization of a Small Satellite’s Design and Operation”, Journal of Spacecraft and Rockets, vol. 51, no. 5, pp. 1648-1663, 2014.

Hwang2014b.pdf (10.24 MB)

M. Shahabsafa, Mohammad-Nezhad, A., Terlaky, T., Zuluaga, L., He, S., Hwang, J. T., and Martins, J. R. R. A., “A Novel Approach to Discrete Truss Design Problems Using Mixed Integer Neighborhood Search”, Structural and Multidisciplinary Optimization, vol. 58, no. 6, p. 2429, 2018.

J. S. Gray, Hwang, J. T., Martins, J. R. R. A., Moore, K. T., and Naylor, B. A., “OpenMDAO: An open-source framework for multidisciplinary design, analysis, and optimization”, Structural and Multidisciplinary Optimization, vol. 59, no. 4, p. 1075--1104, 2019.

OpenMDAO_preprint.pdf (2.75 MB)

J. P. Jasa, Hwang, J. T., and Martins, J. R. R. A., “Open-source coupled aerostructural optimization using Python”, Structural and Multidisciplinary Optimization, 2018.

OAS_SMO_preprint.pdf (794.87 KB)

J. T. Hwang and Steeves, C. A., “Optimization of 3D lattice cores in composite sandwich structures”, Journal of Composite Materials, 2014.

M. Amine Bouhlel, Hwang, J. T., Bartoli, N., Lafage, R., Morlier, J., and Martins, J. R. R. A., “A Python surrogate modeling framework with derivatives”, Advance in Engineering Software, 2019.

preprint_SMT.pdf (1.99 MB)

J. R. R. A. Martins and Hwang, J. T., “Review and Unification of Methods for Computing Derivatives of Multidisciplinary Computational Models”, AIAA Journal, vol. 51, no. 11, p. 2582--2599, 2013.

Martins-Hwang-2013-AIAAJ-derivatives.pdf (737.33 KB)

M. Nelson, Temple, D. W., Hwang, J. T., Young, Y. L., Martins, J. R. R. A., and Collette, M., “Simultaneous optimization of propeller–hull systems to minimize lifetime fuel consumption”, Applied Ocean Research, vol. 43, pp. 46-52, 2013.

Nelson2013-Simultaneous Optimization of Propeller-Hull Systems to Minimize Lifetime-a..pdf (1.19 MB)

J. T. Hwang and Martins, J. R. R. A., “An unstructured quadrilateral mesh generation algorithm for aircraft structures”, Aerospace Science and Technology, vol. 59, pp. 172–182, 2016.

Hwang_Martins_2016b_mdolab.pdf (20.12 MB)

PhD Thesis

J. T. Hwang, “A modular approach to large-scale design optimization of aerospace systems”, 2014.

Hwang_dissertation.pdf (46.92 MB)

Reports

J. R. R. A. Martins and Hwang, J. T., “Multidisciplinary Design Optimization of Aircraft Configurations–-Part 1: A modular coupled adjoint approach”, Von Karman Institute for Fluid Dynamics, Sint--Genesius--Rode, Belgium, 2016.

Martins_VKI_2016_part_1_mdolab.pdf (1.49 MB)