Publications – Putnam Research Group

Selected Articles in Journals

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, Vol. 56, No. 3 (2019), pp. 811-822. doi: 10.2514/1.A34262
Falcone, G., Williams, J. W., Putnam, Z. R., "Assessment of Aerocapture for Orbit Insertion of Small Satellite at Mars," Journal of Spacecraft and Rockets, Vol. 56, No. 6 (2019), pp. 1689-1703. doi: 10.2514/1.A34444
Fawley, D. and Putnam, Z.R., "Comparison of Real-time Guidance Options for Discrete-event Drag Modulation Entry at Mars," Journal of Spacecraft and Rockets, Vol. 58, No. 4(2021), pp. 1071-1083. doi: 10.2514/1.A34796
Williams, J., Gray, M., and Putnam, Z.R., "Six-Degree-of-Freedom Analysis of CubeSat Flight Performance in Very-Low Earth Orbits," Journal of Spacecraft and Rockets, Vol. 58, No. 4 (2021), pp. 1094-1106. doi: 10.2514/1.A34788
Falcone, G. and Putnam, Z.R., "Energy Depletion Guidance for Aerobraking Atmospheric Passes," Journal of Guidance, Control, and Dynamics, published online Nov. 13, 2021. doi: 10.2514/1.G006171
Lohan, K. and Putnam, Z.R., "Characterization of Candidate Solutions for X-Ray Pulsar Navigation," IEEE Transactions on Aerospace and Electronic Systems, Early Access, Feb. 2022. doi: 10.1109/TAES.2022.3152684
Engel, D., Skolnik, N., and Putnam, Z.R., "Comparison of Flap-based and Bank-angle Steering for Mars Entry," Journal of Spacecraft and Rockets, published online, May 2022. doi: 10.2514/1.A35253
Lohan, K. and Putnam, Z.R., "Survey of X-ray Pulsar Navigation Technology," IEEE Transactions on Aerospace and Electronic Systems, in press, accepted Feb. 2021.

Articles in Conference Proceedings

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 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 2018-1936, AIAA Aerospace Sciences Meeting, Kissimmee, 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 2018-1234, AIAA Aerospace Sciences Meeting, Kissimmee, FL, Jan. 8-12, 2018.
Skolnik, N. and Putnam, Z. R., "Defining the Critical Depth of Impact Damage for Thermal Protection Systems," AIAA 2018-1481, AIAA Aerospace Sciences Meeting, Kissimmee, 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 18-052, 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 2019-0662, AIAA SciTech Forum, 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.
Lohan, K. and Putnam, Z.R., "Characterization of Candidate Vehicle States for XNAV Systems," AAS 19-645, AAS Astrodynamics Specialist Conference, Portland, ME, Aug. 2019.
Falcone, G. and Putnam, Z.R., "Aerobraking Trajectory Control Using Articulated Solar Panels ," AAS 19-682, AAS Astrodynamics Specialist Conference, Portland, ME, Aug. 2019.
Williams, J. W., Gray, M.I., and Putnam, Z.R., "Vehicle and Mission Design Options for Very Low Earth Orbit CubeSats," AAS 19-860, AAS Astrodynamics Specialist Conference, Portland, ME, Aug. 2019.
Williams, J.W., Woffinden, D., and Putnam, Z.R., "Mars Entry Guidance and Navigation Analysis Using Linear Covariance Analysis Techniques," AIAA 2020-0597, AIAA SciTech Forum, Orland, FL, Jan. 2020.
Skolnik, N. and Putnam, Z.R., "Evaluation of Formulations for Self-Healing Thermal Protection System Applications ," AIAA 2020-0401, AIAA SciTech Forum, Orland, FL, Jan. 2020.
Fawley, D. and Putnam, Z.R., "Comparison of Real-time Guidance Options for Drag-Modulation Entry at Mars ," AIAA 2020-0848, AIAA SciTech Forum, Orland, FL, Jan. 2020.
Falcone, G. and Putnam, Z. R., "Closed-Form Trajectory Solution for Shallow, High-Altitude Atmospheric Flight," AAS 20-448, 2020 AAS Astrodynamics Specialist Conference, Remote, Aug. 2020.
Falcone, G. and Putnam, Z. R., "Design and Development of an Aerobraking Trajectory Simulation Tool," AIAA 2021-1065, AIAA SciTech Forum, Nashville, TN, Jan. 2021. doi: 10.2514/6.2021-1065
Engel, D., Skolnik, N., and Putnam, Z.R., "Configuration Options for Hypersonic Flaps for Mars Entry Systems," AIAA 2021-0933, AIAA SciTech Forum, Nashville, TN, Jan. 2021. doi: 10.2514/6.2021-0933
McClary, M. and Putnam, Z. R., "Assessment of Hypersonic Separation Dynamics For Drag Modulation Systems at Mars," AIAA 2021-1063, AIAA SciTech Forum, Nashville, TN, Jan. 2021. doi: 10.2514/6.2021-1063
Skolnik, N. and Putnam, Z.R., "Parametric Assessment of Effect of Designed-in Features on Thermal Response of TPS for Self-Healing Applications," AIAA 2021-1716, AIAA SciTech Forum, Nashville, TN, Jan. 2021. doi: 10.2514/6.2021-1716
Engel, D., Dutta, S., and Putnam, Z.R., "Numerical Predictor-Corrector Based Guidance Scheme for Aero-Gravity Assist at Titan for Enceladus Missions," AAS 21-201, AAS Spaceflight Mechanics Meeting, Charlotte, NC, 2021.
Hou, L., Lohan, K., and Putnam, Z.R., "Comparison and Error Modeling of Velocity-Based Initial Orbit Determination Algorithms," AAS 21-280, AAS Spaceflight Mechanics Meeting, Charlotte, NC, 2021.
Williams, J., Brandenburg, W., Woffinden, D., and Putnam, Z.R., "Validation of Linear Covariance Techniques for Mars Entry, Descent, and Landing Guidance and Navigation Performance Analysis," AIAA 2022-0745, AIAA SciTech Forum , San Diego, CA, Jan. 2022.
Brandenburg, W., Williams, J., Woffinden, D., and Putnam, Z.R., "Demonstration of Linear Covariance Analysis Techniques to Evaluate Entry, Descent, and Landing Guidance Algorithms, Vehicle Configurations, Analysis Techniques, and Trajectory Profiles," AIAA 2022-1215 AIAA SciTech Forum , San Diego, CA, Jan. 2022.
Engel, D. and Putnam, Z.R., "Control of a Blunt Body Mars Entry Vehicle with Flaps Using Model Predictive Control, " AIAA 2022-1615, AIAA SciTech Forum, San Diego, CA, Jan. 2022.
Skolnik, N. and Putnam, Z.R., "Experimental Assessment of Thermal Response of Insulating Thermal Protection Systems with Designed-in Features," AIAA 2022-2287, AIAA SciTech Forum, San Diego, CA, Jan. 2022.
Falcone, G. and Putnam, Z.R., "Deep Reinforcement Learning for Autonomous Aerobraking Maneuver Planning and Scheduling," AIAA 2022-2497, AIAA SciTech Forum, San Diego, CA, Jan. 2022.
Helfin, L., Zuiker, N., and Putnam, Z.R., "Linear Covariance Analysis Framework for Aerospace Vehicle Trajectory Modeling and Parametric Design," AIAA 2022-2276, AIAA SciTech Forum, San Diego, CA, Jan. 2022.
Fawley, D., Putnam, Z.R., and D'Souza, S.N., "Assessment of Conductivity in Rarefied Flow about Mars Entry Vehicles," AIAA 2022-0825, AIAA SciTech Forum, San Diego, CA, Jan. 2022.
Sharma, A., Adduci, A.C, Rovey, J.L., Putnam, Z.R., Lembeck, M.F., Ryan, C.N., Ma, C., Berg, S.P., “Green Ionic Liquid Multimode Monopropellant Microthruster,” AIAA 2022-1733, AIAA SciTech Forum , San Diego, CA, Jan. 2022.

Theses

M.S. Theses

Lohan, K., “Assessment of moving-mass actuators for hypersonic vehicles with deployable decelerators”, M.S. thesis, University of Illinois at Urbana-Champaign, 2017. http://hdl.handle.net/2142/97505

Skolnik, N., “Assessment of damage to thermal protection systems due to micrometeoroid and orbital debris impacts,” M.S. thesis, University of Illinois at Urbana-Champaign, 2018. http://hdl.handle.net/2142/101100

[More direct links coming soon. Until then, M.S. theses are available here: https://www.ideals.illinois.edu/]

Ph.D. Theses

Lohan, K., “Methodology for state determination without prior information using X-ray pulsar navigation systems,” Ph.D. thesis, University of Illinois at Urbana-Champaign, 2021. http://hdl.handle.net/2142/113068

Skolnik, N., “Assessment of the effect of designed-in features on thermal protection systems with application to vascular self-healing,” Ph.D. thesis, University of Illinois at Urbana-Champaign, 2022.