Faculty Profile

Zachary R Putnam

Aerospace Engineering
Zachary R Putnam
Zachary R Putnam
Assistant Professor
321F Talbot Laboratory MC 236
104 S. Wright
Urbana Illinois 61801
(217) 300-3231

Primary Research Area

  • Archive: Systems Engineering

Education

  • B.S., Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA, May 2004
  • M.S., Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA, May 2006
  • Ph.D., Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA, May 2015

Academic Positions

  • Assistant Professor, Department of Aerospace Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, Aug. 2015-present
  • Research Engineer II, Space Systems Design￿Laboratory, School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA, Apr.-Jul. 2015

For more information

Other Professional Employment

  • Member of the Technical Staff II, Charles Stark Draper Laboratory, Inc., Houston, TX and Cambridge, MA, Sep. 2006-Dec. 2009
  • Senior Member of the Technical Staff, Charles Stark Draper Laboratory, Inc., Cambridge, MA, Jan.-Aug. 2010

Research Interests

  • Space mission design
  • Atmospheric and space flight mechanics
  • Uncertainty analysis techniques for nonlinear systems
  • Entry, descent, and landing systems
  • Aerospace guidance, navigation, and control
  • Hypersonic and space systems design

Selected Articles in Journals

  • Putnam, Z. R., Braun, R. D., Rohrschneider, R. R., and Dec, J. A., “Entry System Options for Human Return from the Moon and Mars,” Journal of Spacecraft and Rockets, Vol. 44, No. 1 (2007), pp.194- 202. doi: 10.2514/1.20351
  • Wooster, P. D., Braun, R. D., Ahn, J., and Putnam, Z. R., "Mission Design Options for Human Mars Missions," MARS: The International Journal of Mars Science and Exploration, Vol. 3, Aug. 2007, pp. 12-28.
  • Putnam, Z. R., Braun, R. D., Bairstow, S. H., and Barton, G. H., “Improving Lunar Return Entry Range Capability Using Enhanced Skip Trajectory Guidance,” Journal of Spacecraft and Rockets, Vol. 45, No. 2 (2008), pp. 309-315. doi: 10.2514/1.27616
  • Meginnis, I., Putnam, Z. R., Clark, I. G., and Braun, R. D., "Guided Entry Performance of Low Ballistic Coefficient Vehicles at Mars," Journal of Spacecraft and Rockets, Vol. 50, No. 5 (2013), pp. 1047-1059. doi: 10.2514/1.A32425
  • Putnam, Z. R. and Braun, R. D., "Precision Landing at Mars Using Discrete-Event Drag Modulation," Journal of Spacecraft and Rockets, Vol. 51, No. 1 (2014), pp. 128-138. doi: 10.2514/1.A32633
  • Putnam, Z. R. and Braun, R. D., "Drag-Modulation Flight-Control System Options for Planetary Aerocapture," Journal of Spacecraft and Rockets, Vol. 51, No. 1 (2014), pp. 139-150. doi: 10.2514/1.A32589
  • Putnam, Z. R., Grant, M. J., Kelly, J. R., Braun, R. D., and Krevor, Z. C., "Feasibility of Guided Entry for a Crewed Lifting Body Without Angle-of-Attack Control," Journal of Guidance, Control, and Dynamics, Vol. 37, No. 3 (2014), pp. 729-740. doi: 10.2514/1.62214
  • Putnam, Z. R. and Braun, R. D., "Extension and Enhancement of the Allen-Eggers Solution for Ballistic Entry Trajectories," Journal of Guidance, Control, and Dynamics, Vol. 38, No. 3 (2015), pp. 414-430. doi: 10.2514/1.G000846
  • Putnam, Z. R. and Braun, R. D., "Analytic Assessment of Drag-Modulation Trajectory Control for Planetary Entry," Journal of the Astronautical Sciences, Vol. 65, No. 4 (2018), pp. 470-489. doi: 10.1007/s40295-018-0134-z
  • Lorenz, C.G. and Putnam, Z.R., "Entry Trajectory Options for High Ballistic Coefficient Vehicles at Mars," Journal of Spacecraft and Rockets, accepted Jul. 2018.

Articles in Conference Proceedings

  • Weston, N., Mavris, D., Fitzgerald, C., Putnam, Z. R., and Pouchet, C., "A Conceptual Design Environment for Technology Selection and Performance Optimization for Torpedoes," AIAA Paper 2002-5590, 9th AIAA/ISSMO Symposium on Multidisciplinary Analysis and Optimization, Atlanta, GA, Sep. 2-6, 2002.
  • Putnam, Z. R., Braun, R. D., Rohrschneider, R. R., and Dec, J. A., "Entry System Options for Human Return from the Moon and Mars," AIAA Paper 2005-5915, AIAA Atmospheric Flight Mechanics Conference and Exhibit, San Francisco, CA, Aug. 15-18, 2005.
  • Wooster, P. D., Braun, R. D., Ahn, J., and Putnam, Z. R., "Trajectory Options for Human Mars Missions," AIAA Paper 2006-6308, AIAA/AAS Astrodynamics Specialist Conference and Exhibit, Keystone, CO, Aug. 21-24, 2006.
  • Putnam, Z. R., Braun, R. D., Bairstow, S. H., and Barton, G. H., "Improving Lunar Return Entry Footprints Using Enhanced Skip Trajectory Guidance," AIAA Paper 2006-7438, AIAA Space 2006 Conference, San Jose, CA, Sep. 19-21, 2006.
  • Rea, J. R. and Putnam, Z. R., "A Comparison of Two Orion Skip Entry Guidance Algorithms," AIAA Paper 2007-6424, AIAA Guidance, Navigation, and Control Conference and Exhibit, Hilton Head, SC, Aug. 20-23, 2007.
  • Putnam, Z. R. and Barton, G. H., "Entry Range Capability Analysis of the Orion Crew Module," IEEEAC paper #1524, 2008 IEEE Aerospace Conference, Mar. 1-8, 2008.
  • Sargent, R., Barton, G. H., Putnam, Z. R., and Neave, M. D., "PredGuid Lateral Channel Guidance during Skip Entry for Orion," AAS Paper 09-093, ITAR-restricted paper, AAS Guidance and Control Conference, Breckenridge, CO, Jan. 31-Feb. 4, 2009.
  • Putnam, Z. R., Barton, G. H., and Neave, M. D., "An Entry Trajectory Design Methodology for Lunar Return," AIAA Paper 2009-5773, AIAA Guidance, Navigation, and Control Conference and Exhibit, Chicago, IL, Aug. 10-13, 2009.
  • Putnam, Z. R., Neave, M. D., and Barton, G. H., "PredGuid Entry Guidance for Orion Return from Low Earth Orbit," IEEEAC paper #1571, 2010 IEEE Aerospace Conference, Big Sky, MT, Mar. 6-13, 2010.
  • Meginnis, I., Putnam, Z. R., Clark, I. G., and Braun, R. D., "Guided Entry Performance of Low Ballistic Coefficient Vehicles at Mars," 2012 IEEE Aerospace Conference, Big Sky, MT, Mar. 3-10, 2012.
  • Putnam, Z. R., Clark, I. G., and Braun, R. D., "Drag Modulation Flight Control for Aerocapture," 2012 IEEE Aerospace Conference, Big Sky, MT, Mar. 3-10, 2012.
  • Putnam, Z. R., Grant, M. J., Kelly, J. R., Braun, R. D., and Krevor, Z. C., "Variable Angle-of-attack Profile Entry Guidance for a Crewed Lifting Body," AIAA Paper 2013-0029, 51st AIAA Aerospace Sciences Meeting, Grapevine, TX, Jan. 2013.
  • Putnam, Z. R. and Braun, R. D., "Drag Modulation Flight Control System Options for Planetary Aerocapture," AIAA Paper 2013-0030, 51st AIAA Aerospace Sciences Meeting, Grapevine, TX, Jan. 2013.
  • Putnam, Z. R. and Braun, R. D., "Precision Landing at Mars Using Discrete-event Drag Modulation," AAS Paper 13-438, Advances in the Astronautical Sciences, Vol. 148, Univelt, Inc., San Diego, CA, 2013, pp. 3815-3834.
  • Braun, R. D., Putnam, Z. R., Steinfeldt, B. A., and Grant, M. J., "Advances in Inertial Guidance Technology for Aerospace Systems," AIAA Paper 2013-5123, AIAA Guidance, Navigation, and Control Conference, Boston, MA, Aug. 2013.
  • Putnam, Z. R. and Braun, R. D., "Enhancement and Extension of the Allen-Eggers Solution for Ballistic Entry Trajectories," AIAA Paper 2014-2381, AIAA Atmospheric Flight Mechanics Conference, Atlanta, GA, Jun. 2014.
  • Putnam, Z. R. and Braun, R. D., "Analytical Assessment of Drag-Modulation Trajectory Control for Planetary Entry," AAS Paper 15-748, AAS Astrodynamics Specialist Conference, Vail, CO, Aug. 2015.
  • Anderson, T. R., Putnam, Z. R., and Braun, R. D., "Strategies for Landing Large Ballistic Coefficient Vehicles on Mars," AIAA Paper 2016-0021, AIAA Atmospheric Flight Mechanics Conference, San Diego, CA, Jan. 4-8, 2016.
  • Putnam, Z. R. and Braun, R. D., "Review and Assessment of the Steep Lifting Entry Closed-Form Trajectory Solution," AIAA Paper 2016-0278, AIAA Atmospheric Flight Mechanics Conference, San Diego, CA, Jan. 4-8, 2016.
  • Putnam, Z. R. and Braun, R. D., "Advances in Guidance, Navigation, and Control for Planetary Entry, Descent, and Landing Systems," AAS Paper 16-092, AAS Guidance and Control Conference, Breckenridge, CO, Feb. 5-10, 2016.
  • Lohan, K. G. and Putnam, Z. R., "Moving-Mass Actuator System Options For Entry Vehicles with Deployable Decelerators," AAS Paper 16-373, AAS Spaceflight Mechanics Meeting, Napa, CA, Feb. 14-18, 2016.
  • Lorenz, C. G. and Putnam, Z. R., "Optimal Hypersonic Trajectory Strategies for Supersonic Retropropulsion at Mars," AIAA Paper 2017-0247, AIAA Atmospheric Flight Mechanics Conference, Grapevine, TX, Jan. 9-13, 2017.
  • Lohan, K. G. and Putnam, Z. R., "Moving Mass Actuator Control for Mars Entry Vehicles," AAS Paper 17-134, AAS Guidance and Control Conference, Breckenridge, CO, Feb. 3-8, 2017.
  • Sepulveda, J. and Putnam, Z. R., "An Assessment of Aerodynamic Flaps for Planetary Entry Trajectory Control," AAS Paper 17-035, AAS Guidance and Control Conference, Breckenridge, CO, Feb. 3-8, 2017.
  • Zuiker, N. J., Williams, J. W., Putnam, Z. R., Levin, D.A., Ghosh, A. M., Goggin, M., Alexeenko, A., "Design of a CubeSat Mission to Investigate High-Enthalpy Nonequilibrium Flow Chemistry", AIAA Paper 2018-1936, 2018 Aerospace Sciences Meeting, Kissimme, FL, Jan. 8-12, 2018.
  • Morgan, J., Nuwal, N., Williams, J., Putnam, Z. R., Levin, D. A., Pikus, A., Berger, A., Alexeenko, A., "Prediction of Flight Measurements of High-Enthalpy Nonequilibrium Flow from a CubeSat-Class Atmospheric Probe," AIAA Paper 2018-1234, 2018 Aerospace Sciences Meeting, Kissimme, FL, Jan. 8-12, 2018.
  • Skolnik, N. and Putnam, Z. R., "Defining the Critical Depth of Impact Damage for Thermal Protection Systems," AIAA Paper 2018-1481, 2018 Aerospace Sciences Meeting, Kissimme, FL, Jan. 8-12, 2018.
  • Falcone, G., Williams, J. and Putnam, Z.R., "Small Satellite Drag-Modulation Aerocapture Mission Design Options for Mars Small Satellites," AAS Guidance and Control Conference, Breckenridge, CO, Feb. 2-7, 2018.
  • Wolf, A., Noyes, C., Strauss, W., Benito, J., Lobbia, M., McCann, J., Nakazono, B., Putnam, Z. R., and Lorenz, C. G., "Supersonic Retropropulsion on Mars Landers: Selected Design Trades," AAS Paper 18-486, AIAA/AAS Astrodynamics Specialist Conference, Snowbird, UT, August 19-23, 2018.
  • Woffinden, D., Robinson, S., Williams, J., and Putnam, Z.R., "Linear Covariance Analysis Techniques to Generate Navigation and Sensor Requirements for the Safe and Precise Landing Integrated Capabilities Evolution (SPLICE) Project," AIAA Guidance, Navigation, and Control Conference, San Diego, CA, Jan. 2019.
  • Zinner, E. and Putnam, Z.R., "Parking Orbit Selection for Mars Aerocapture-Entry Systems," AAS 19-463, AAS Spaceflight Mechanics Meeting, Maui, HI, Jan. 2019.

Professional Societies

  • American Institute of Aeronautics and Astronautics, senior member (2010-present), professional member (2006-2010), student member (2004-2006)
  • American Society for Engineering Education, member (2015-present), student member (2012-2015)
  • American Astronautical Society, member (2015-present), student member (2013-2015)
  • AIAA Atmospheric Flight Mechanics Technical Committee, member (2015-present)