Refereed Journal Publications
Koeroghlian, M.M., and R.G. Longoria, “Breathing Through a Positive-Pressure, Demand-Flow Life Support System: A Conceptual Dynamic Model”, SAFE Journal, Accepted for publication, February, 2022.
Rapp, E.S., S. R. Pawar and R. G. Longoria, “Hybrid Mock Circulatory Loop Simulation of Extreme Cardiac Events,” in IEEE Transactions on Biomedical Engineering (appeared online 07 March 2022), doi: 10.1109/TBME.2022.3156963
Pawar, S.R., E.S. Rapp, J.R. Gohean, and R.G. Longoria, “Parameter Identification of Cardiovascular System Model used for Left Ventricular Assist Device Algorithms”, ASME Journal of Engineering and Science in Medical Diagnostics and Therapy, 2022 Feb 1;5(1):011006. https://doi.org/10.1115/1.4053065
Koeroghlian, M.M., S. Nichols, and R.G. Longoria, “A Respiratory Mechanics Model of the Human Lung for Positive Pressure Breathing at High Altitude”, ASME Journal of Dynamic Systems, Measurement, and Control, Vol. 142(10), October 2020. https://doi.org/10.1115/1.4047220
Rapp, E.S., S. Pawar, J.R. Gohean, E. Larson, R.W. Smalling, and R.G. Longoria, “Estimation of Systemic Vascular Resistance Using Built-In Sensing From an Implanted Left Ventricular Assist Device”, ASME Journal of Engineering and Science in Medical Diagnostics and Therapy, Special Issue on Novel and Emergent Personalized Cardiovascular Medicine, Vol. 2 (4): 041008 (9 pages), November 2019. https://doi.org/10.1115/1.4045204
Gohean, J.R., E.R. Larson, R.G. Longoria, M. Kurusz, and R.W. Smalling, “Physiological Preload Sensitivity with TORVAD Counterpulse Support”, Cardiovascular Engineering and Technology}, Vol. 10 (3), pp. 520-530, September 2019. https://doi.org/10.1007/s13239-019-00419-0
Longoria, R.G., R. Brushaber, and A. Simms, “An In-Wheel Sensor for Monitoring Tire-Terrain Interaction: Development and Laboratory Testing”, Journal of Terramechanics, Vol. 82, pp. 43–52, April 2019. https://doi.org/10.1016/j.jterra.2018.12.004
Bartoli, C., S. Hennessy-Strahs, J.R. Gohean, M. Villeda, E. R. Larson, R.G. Longoria, M. Kurusz, M. Acker, R. Smalling, “A Novel Toroidal-Flow Left Ventricular Assist Device Minimizes Blood Trauma: Implications of Improved Ventricular Assist Device Hemocompatibility”, The Annals of Thoracic Surgery, Vol. 107 (6), pp. 1761-1767.
Gohean, J.R., E.R. Larson, B.H. Hsi, M. Kurusz, M., R.W. Smalling, and R.G. Longoria, “Scaling the low-shear pulsatile TORVAD for pediatric heart failure”, \textit{ASAIO Journal},Vol. 63, No. 2, pp. 198-206, Mar-Apr 2017.
Hearn, C.S., S.B. Pratap, D. Chen, and R.G. Longoria, “Dynamic Performance of Lumped Parameter Model for Superconducting Levitation,” IEEE Transactions on Applied Superconductivity, Vol. 26, No. 6, September 2016, 3602608.
Gohean, J.R., M.J. George, K.W. Chang, E.R. Larson, T.D. Pate, M. Kurusz, R.G. Longoria, and R.W. Smalling, “Preservation Of Native Aortic Valve Flow And Full Hemodynamic Support With The TORVAD$^{TM}$ Using A Computational Model Of The Cardiovascular System”, ASAIO Journal, Vol. 61, No. 3, pp. 259-265, May-Jun, 2015.
LeSage, J.R. and R.G. Longoria, “Mission Feasibility Assessment for Mobile Robotic Systems Operating in Stochastic Environments,” Journal of Dynamic Systems, Measurement and Control, Special Issue on Stochastic Models, Control and Algorithms in Robotics, vol. 137, no.3, pp. -, October 2014
Hearn, C.S., S.B. Pratap, D. Chen, and R.G. Longoria, “Lumped Parameter Model to Describe Dynamic Translational Interaction for High Temperature Superconducting Bearings,” IEEE Transactions on Applied Superconductivity, vol 24, no. 2, April 2014
Hearn, C.S., S.B. Pratap, D. Chen, and R.G. Longoria, “Reduced Order Dynamic Model of Permanent Magnet and HTSC Interaction in an Axisymmetric Frame,” IEEE Transactions on Mechatronics, vol. 19, no. 4, pp. 1226-1233, Aug. 2014
Hearn, C.S., M. C. Lewis, S. B. Pratap, R. E. Hebner, F. M. Uriarte, D. Chen and R. G. Longoria, “Utilization of Optimal Control Law to Size Grid-Level Flywheel Energy Storage,” IEEE Transactions on Sustainable Energy, vol. 4, no. 3, pp. 611-618, July 2013
Gohean, J.R., M.J. George, T.D. Pate, M. Kurusz, R.G. Longoria, and R.W. Smalling RW, “Verification of a computational cardiovascular system model comparing the hemodynamics of a continuous flow to a synchronous valveless pulsatile flow left ventricular assist device,” ASIAO Journal, Volume 59, Issue 2, pages 107-116, March/April 2013
LeSage, J.R. and R.G. Longoria, “Characterization of Load Uncertainty in Unstructured Terrains and Applications to Battery Remaining Run-time Prediction,” Journal of Field Robotics, Volume 30, Issue 3, pages 472–487, May/June 2013
Letsou, G.V., Pate, T.D., Gohean, J.R., Kurusz, M., Longoria, R.G., Kaiser, L., Smalling, R.W., “Improved left ventricular unloading and circulatory support with synchronized pulsatile left ventricular assistance compared with continuous-flow left ventricular assistance in an acute porcine left ventricular failure model,” \textit{Journal Of Thoracic And Cardiovascular Surgery}, Vol. 140, (2010), 5, pp. 1181-1188
Connolly, T.J.M., Longoria, R.G., “An Approach for Actuation Specification and Synthesis of Dynamic Systems,” \textit{Journal Of Dynamic Systems, Measurement, And Control}, Vol. 131, 2009, No. 3, pp. 1-15.
Solis, J.M., Longoria, R.G., “Modeling Track-Terrain Interaction for Transient Robotic Vehicle Maneuvers,” \textit{Journal Of Terramechanics}, Vol. 45, 2008, No. 3, pp. 65-78
Wang, J., Longoria, R.G., “Coordinated and Reconfigurable Vehicle Dynamics Control,” \textit{IEEE Transactions On Control System Technology}, Vol. 17, 2008, No. 3, pp. 723-732
Patil, C.B., Longoria, R.G., “Modular Design and Testing for Anti-Lock Brake Actuation and Control Using a Scaled Vehicle System,” International Journal Of Vehicle Systems Modeling And Testing, Vol. 2, No.4, 2008, pp. 411–427
Wang, J., Longoria, R.G., “Effect of Computational Delay on the Performance of a Hybrid Adaptive Cruise Control System, 2006-01-0800,” Journal Of Passenger Cars – Electronic & Electrical Systems (SAE), Vol. 115, 2006, pp. 307–316
Campos, J., Crawford, M., Longoria, R., “Rotordynamic Modeling Using Bond Graphs: Modeling the Jeffcott Rotor,” IEEE Transactions On Magnetics, Vol. 41, 2005, No. 1, pp. 274–280
Longoria, R.G., A. Al-Sharif, and C. Patil, “Scaled Vehicle System Dynamics and Control: A Case Study on Anti-Lock Braking,” International Journal Of Vehicle Autonomous Systems, Vol. 2, 2004, No. 1/2, pp. 18–39
Kypuros, J.A., and R.G. Longoria, “Model Synthesis for Design of Switched Systems Using Variable Structure Theory,” Journal Of Dynamics Systems, Measurement, And Control, Vol. 125, 2003, No. 4, pp. 618–629
Compere, M.D. and R.G. Longoria, “Combined DAE and Sliding Mode Control Methods for Simulation of Constrained Mechanical Systems,” Journal Of Dynamics Systems, Measurement, And Control, Vol. 122, December 2000, No. 4, pp. 691–698
Tumer, I.Y., R.G. Longoria, and K.L. Wood, “Signal Analysis Using Karhunen-Loeve Transformation: Application to Hydrodynamic Forces,” Journal Of Ofshore Mechanics And Arctic Engineering, Vol. 122, August 2000, No. 3, pp. 208-213
Lee, M., R.G. Longoria, and D.E. Wilson, “Ballistic Waves in High Speed Water Entry,” Journal Of Fluids And Structures, Vol. 11, November 1997, No. 7, pp. 819–844
Lee, M., R.G. Longoria, and D.E. Wilson, “Cavity Dynamics in High Speed Water Entry,” Physics Of Fluids, Vol. 9, March 1997, No. 3, pp. 540–550
Longoria, R.G., and V.A. Narayanan, “Modeling and Design of an Inertial Vibration Reflector,” Journal Of Mechanical Design (ASME), Vol. 119, March 1997, No. 1, pp. 20–27
Longoria, R.G., “A Methodology for Modeling Lift as a Modulated Process,” \textit{Journal Of Ofshore Mechanics And Arctic Engineering, Vol. 118, February 1996, No. 1, pp. 21–28
Longoria, R.G., “Wave-Scattering Formalisms for Multiport Energetic Systems,” \textit{Journal Of The Franklin Institute, }Vol. 333(B), 1996, No. 4, pp. 539–564
Paynter, H.M. and R.G. Longoria, “Simulation of Nonlinear Poisson Problems from Black Holes to Nuclei: I. Introducing the Successive Simulation Perturbation Technique,” Systems Analysis Modeling Simulation, Vol. 18-19, 1995, pp. 191–196
Longoria, R.G., R.W. Miksad and J.J. Beaman, “Frequency Domain Modeling of Inline Forces on Circular Cylinders in Random Oscillatory Flow,” Journal Of Ofshore Mechanics And Arctic Engineering (ASME), Vol. 115, February 1993, No. 1, pp. 23–30
Longoria, J.J. Beaman and R.W. Miksad, “An Experimental Investigation of Forces Induced on Cylinders by Random Oscillatory Flow,” Journal Of Offshore Mechanics And Arctic Engineering (ASME), Vol. 113, November 1991, No. 4, pp. 275–285
Longoria, R.G., J.J. Beaman, and R.W. Miksad, “Drag, Inertia and Lift Coefficients in Random Oscillatory Flow,” International Journal Of Offshore and Polar Engineering, Vol. 1, September 1991, No. 3, pp. 242–245
Issued Patents
Jeffrey R. Gohean, Thomas D. Pate, Raul G. Longoria, and Richard W. Smalling, “System and method for pump with deformable bearing surface,” 8,167,593, USA, May 1, 2012
Thomas D. Pate, Raul G. Longoria, Jeffrey R. Gohean, and Richard W. Smalling, “Positive displacement pump system and method with rotating valve,” 8,366,401, USA, February 5, 2013
Thomas D. Pate, Raul G. Longoria, Jeffrey R. Gohean, and Richard W. Smalling, “System and method for pump variable stroke,” 8,386,040, USA, February 26, 2013
Thomas D. Pate, Raul G. Longoria, Jeffrey R. Gohean, and Richard W. Smalling, “Positive displacement pump system and method,” 8,568,113, USA, October 29, 2013
Thomas D. Pate, Jeffrey R. Gohean, Raul G. Longoria, and Richard W. Smalling, “Magnetic Ventricular Connector,” 8,715,305, USA, May 6, 2014
Conference Publications
Koeroghlian, M.M., and R.G. Longoria, “Bond Graph Model of a Fighter Pilot’s Breathing Support System”, International Conference on Bond Graph Modeling 2021 (ICBGM’21), November 8-10, 2021, San Diego, CA
Espinoza, A.E., T.M. Dar, and R.G. Longoria, “Estimating vehicle-terrain interaction parameters from tracked-robot sensor data”, MECC 2021, October 24-27, 2021, Austin, TX
Rapp, E.S., Pawar, S.R., Gohean, J.R., Larson, E., and Longoria, R.G., “Evaluating a hardware-in-the-loop system intended for testing ventricular-assist device control and sensing algorithms,” 2020 American Control Conference (ACC), Denver, CO, July 1-3, 2020 (accepted for invited session)
LeSage, J.R. and R.G. Longoria, “Mobile System Shutdown Prevention vis Energy Storage-aware Predictive Control,” 2016 American Control Conference (ACC), Boston, MA, July 6-8, 2016
LeSage, J.R. and R.G. Longoria, “Hybrid observer design for online battery state-of-charge estimation,” American Control Conference (ACC), Washington, D.C., June 17-19, 2013, pp. 1994-1999
Dar, T.M., and R.G. Longoria, “Estimating traction coefficients for small-scale robotic tracked vehicles,” ASME 2010 Dynamic Systems and Control Conference, Volume 2, Cambridge, Massachusetts, USA, September 12–15, 2010
Gohean, J.R., T.D., Pate, R.G. Longoria, R.W. Smalling, M. Kurusz, “Comparison of a valveless pulsatile assist device with continuous flow in a computational model of the cardiovascular system,” American Society of Artificial Organs, 57th Conference, Washington, D.C., Vol. 57(2), pp. 77, June 10-12, 2011
LeSage, J.R., R.G. Longoria, and W. Shutt, “Power system stability analysis of synthesized complex impedance loads on an electric ship,” Electric Ship Technologies Symposium (ESTS), Alexandria, VA, published by IEEE, pp. 34-37, April 10-13, 2011
Longoria, R.G., J.R. LeSage, and W. Shutt, “Modeling and Requirements Formulation for Submarine Control Surface Actuation Systems,” ASNE Day 2010 (American Society of Naval Engineers), Hyatt Regencey Crystal City, Arlington, VA, April 8-9, 2010
Dar, T.M. and R. G. Longoria, “Slip estimation for small-scale robotic tracked vehicles,” American Control Conference, June 30-July 2, 2010, Baltimore, MD, p. 6816-6821, 2010
Hearn, C., M. C. Lewis, R.C. Thompson, and R. G. Longoria, “Modeling and Evaluation of a Plug-In Hybrid Fuel Cell Shuttle Bus,” The 5th IEEE Vehicle Power and Propulsion Conference (VPPC’09), September 7-11, 2009, Dearborn, MI.
Gulati, S., C. Jhurani, B. Kuipers and R. Longoria, “A Framework for Planning Comfortable and Customizable Motion of an Assistive Mobile Robot,” The 2009 IEEE/RSJ International Conference on Intelligent RObots and Systems (IROS 2009), October 11–15, 2009 , St. Louis, MO.
Patil, C.B., S.V. Sreenivasan, and R.G. Longoria, “Robust Design Of Flexure Based Nano Precision Compliant Mechanisms with Application to Nano Imprint Lithography,” 2008 Design Engineering Technical Conferences and Computers and Information in Engineering Conference (ASME), New York City, NY, August 3-6, 2008.
Patil, C.B., S.V. Sreenivasan, and R.G. Longoria, “Analytical And Experimental Characterization of Parasitic Motion In Flexure-Based Selectively Compliant Precision Mechanisms,” 2008 Design Engineering Technical Conferences and Computers and Information in Engineering Conference (ASME), New York City, NY, August 3-6, 2008.
Patil, C.B., S.V. Sreenivasan, and R.G. Longoria, “Analytical Representation of Nanoscale Parasitic Motion in Flexure-based One DOF Translation Mechanism,” Proceedings of the 21st Annual Meeting, American Society for Precision Engineering, Dallas, Texas, October 16-17, 2007
Wang, J., Solis, J.M., Longoria, R.G., “On the Control Allocation for Coordinated Ground Vehicle Dynamics Control,” American Control Conference, New York, NY, pp 5724-5729, 2007
Flynn, M., Hearn, C., Lewis, M., Thompson, R., Longoria, R.G., “Prime Mover and Energy Storage Considerations for a Hydrogen-Powered Series Hybrid Shuttle Bus,” Proceedings of IEEE Vehicle Power and Propulsion Conference, Arlington, Texas, USA, September 9-12, 2007, pp. 821-828
Hearn, C., Flynn, M., Lewis, M., Thompson, R., Murphy, B.T., Longoria, R.G., “Low Cost Flywheel Energy Storage for a Fuel Cell Powered Transit Bus,” Proceedings of IEEE Vehicle Power and Propulsion Conference, Arlington, Texas, USA, September 9-12, 2007, pp. 829-836.
Shasteen, Michael, Davey, Kent, Longoria, Raul, Shutt, William, “Practical Considerations in Implementing Shipboard Power System Reconfiguration Control Schemes . IEEE Publication Date: 2 1-23 May 2007 ,” IEEE Electric Ship Technologies Symposium, 2007. ESTS ’07, Arlington, VA, pp 196-200, 2007
Davey, K.; Longoria, R.; Shutt, W.; Carroll, J.; Nagaraj, K.; Park, J.; Rosenwinkel, T.; Wu, W. {\&} Arapostathis, A., “Reconfiguration in Shipboard Power Systems,” American Control Conference, New York, NY, pp 4750-4755, 2007
Wang, J., Longoria, R.G., “Coordinated vehicle dynamics control with control distribution,” American Control Conference, Minneapolis, MN, pp 6pp, 2006
Wang, J., Longoria, R.G., “Combined Tire Slip and Slip Angle Tracking Control for Advanced Vehicle Dynamics Control Systems,” IEEE Conference On Decision And Control, San Diego, CA, pp 1733-1738, 2005
Juarez, J., Longoria, R.G., “Bond Graph C-Field Representations for Tug {\&} Twist Pneumatic Polymeric Actuator Technology,” International Conference On Bond Graph Modeling, New Orleans, LA, 2005
Campos, J., Longoria, R.G., and Surls, D., “Rotordynamic Modeling Using Bond Graphs: Modeling the Jeffcott Rotor,” Electromagnetic Launch Technology Symposium, Snowbird, Utah, published by IEEE, 2004
Patil, C.B.; Longoria, R.G.; Limroth, J., “Control prototyping for an anti-lock braking control system on a scaled vehicle,” 42nd IEEE Conference On Decision And Control (CDC 2003), Maui, Hawaii, published by IEEE, Vol. 5, pp 4962 – 4967, 2003
McBride, B., R.G. Longoria, and E. Krotkov, “Measurement and Prediction of the Off-Road Mobility of Small Robotic Ground Vehicles,” 2003 Performance Metrics For Intelligent Systems Workshop (PerMIS’03), Gaithersburg, MD, published by NIST, 2003
Wangcharoenrung, C. and R.G. Longoria, “A Bond Graph Model of Outer Hair Cell Active Force Generation,” International Conference On Bond Graph Modeling And Simulation (ICBGM) 2003, Orlando, FL, published by Society for Computer Simulation, January 2003
Kypuros, J.A. and R.G. Longoria, “Variable Fidelity Modeling for Vehicle Dynamics using and Element Activity,” 2002 ASME IMECE Automated Modeling Symposium, New Orleans, LA, published by ASME, November 2002
Zhang, Fu, R.G. Longoria, R. Thelen, and D. Wardell, “A Simulation-Based Design Study for a Locomotive Electric,” 7th International Conference On Modeling And Simulation Of Electric Machines, Converters And Systems, Montreal, Canada, August 18-21, 2002
Kiritsis, N., R.G. Longoria and R. Gonzales, “Network Thermodynamic Bond Graph Models for Microdialysis Probe Processes,” International Conference On Bond Graph Modeling And Simulation, Phoenix, AZ, January 2001
Connolly, T.J. and R.G. Longoria, “Simulation-Based Synthesis for Engineering Systems that Contain Active Elements,” Automated-Modeling Symposium, International Mechanical Engineering Congress And Exhibition (IMECE), Orlando, FL, November 5-10, 2000
Efatpenah, J.H. Beno, S. Nichols, and R.G. Longoria, “Challenges in Controlling Active Suspension in High Speed Vehicles,” International Mechanical Engineering Congress And Exhibition (IMECE), Orlando, FL, November 5-10, 2000
Longoria, R.G., “Resistance in Unsteady Flow: Search for a Physics-Based Model,” \textit{Proceedings Of The 22nd Symposium On Naval Hydrodynamics, }Washington, D.C., August 9-14, 1998, (Invited Discussion)
Paynter, H.M. and R.G. Longoria, “Efficient Computer Models of Automotive Fluid Couplings and Torque Converters,” ASME Fluid Machinery Forum, Fluids Engineering Division Summer Meeting, Washington, D.C., June 21-25, 1998
Paynter, H.M. and R.G. Longoria, “Two-Port Canonical Bond Graph Models of Lossy Power Transduction,” Proceedings Of The 1997 IEEE International Conference On Systems, Man, And Cybernetics, IEEE/SMC 97, Orlando, FL, pp 1533-1537, October 12-15, 1997
Longoria, R.G., J.A. Kypuros and H.M. Paynter, “Bond Graph and Wave-Scattering Models of Switched Power,” Proceedings Of The 1997 IEEE International Conference On Systems, Man, And Cybernetics, IEEE/SMC 97, Orlando, FL, pp 1522-1526, October 12-15, 1997
Longoria, R.G., “Integration of Experimentation and Design into a Dynamic Systems Laboratory: Study of The Two-Can System,” Proceedings Of The ASEE/GSW Annual Conference, Houston, TX, pp 159-164, March 1997
Paynter, H.M. and R.G. Longoria, “Bond Graphs and the Real-Go of Things: I. Project Toucan,” Proceedings Of The International Bond Graph Modeling And Simulation Conference, Phoenix, Arizona, pp 39-43, January 12-15, 1997
Lee, M., R.G. Longoria, and D.E. Wilson, “An Extended Hydraulic Ram Model,” Structures Under Extreme Loading Conditions, }Vol. PVP-325, pp 75-82, July 1996
Paynter, H.M. and R.G. Longoria, “Simulation of Nonlinear Poisson Problems from Black Holes to Nuclei: I. Introducing the Successive Simulation Perturbation Technique,” Proceedings Of The IMACS Symposium On Systems Analysis And Simulation,Berlin, June 26-3 0, 1995
Longoria, R.G., “Modeling and analysis of hydrodynamic lift forces,” Proceedings Of The 13th International Conference On Offshore Mechanics And Arctic Engineering, Houston, Texas, pp 325-3 32, March 1994
Longoria, R.G., R.W. Miksad and J.J. Beaman, “Frequency Domain Modeling of Inline Forces on Circular Cylinders in Random Oscillatory Flow,” Proceedings Of Th 10th International Conference On Offshore Mechanics And Arctic Engineering, Stavanger, Norway Forum, June 1991
Longoria, R.G., J.J. Beaman and R.W. Miksad, “Nonlinear Hydrodynamic Forces on Circular Cylinders in Random Oscillatory Flow,” Proceedings Of The First European Offshore Mechanics Symposium, Trondheim, Norway, August 1990