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Research
philosophy: My method for selecting projects and student collaborators
seeks to balance the teaching and research mission at the University
of Texas at Austin. I have a responsibility to the students attending
this University and to the citizens of this state to help maintain
a knowledgebase in the classical areas of mechanical engineering
as well as to help introduce new lines of research study in our
evolving discipline. These new areas arise through collaboration
with researchers in academia, industry, and government. The list
of projects below demonstrates the opportunities available to conduct
highly interdisciplinary research in this field of study.
Finally,
most of the projects listed below have been developed through collaboration
with a student who has taken on the task of completing a Master's
thesis or report or a Doctoral dissertation. While some of the theses/dissertations
relate to a sponsored project or
contract, others arose from unfunded work. A concise listing
of the students and their theses can also be found on the group
page. Links to detailed content are continuously being added
to the listings given below, especially to highlight collaborators,
results, and current status.
NOTE: Active student projects below appear
in green.
- Biophysical
Systems Modeling and Biomedical Devices
- Dynamic
System Modeling, Synthesis, and Testing | Modeling
of Physical Systems Course Page
- Fluid-Structure
Interaction
- Mechatronics,
Electromechanics, and Power Systems
- Vehicle
System Dynamics and Controls | VSDC
Course Page
Biophysical
Systems and Biomedical Devices
- Electromechanical
Left-Ventricular Assist Device (LVAD) Development
- Design
and Development of a Circular Left-Ventricular Assist Device
(Tom Pate, M.S., August 2005)
- Design
and Implementation of a Mock Circulatory System for the Evaluation
of LVADs (Jeffrey Krol, M.S., December 2007)
- Automated/Robotic
Tube Insertion
-
Design of an Automated System for Insertion of a Tube into
the Human Thoracic Cavity (Alex Bjelica, M.S., May 2007)
- Surgical
Robotics (Amiee Quon, M.S. Report, May 2007)
- Automated
Needle Insertion into a Vein or Thoracic Cavity (Albert Espinoza,
M.S.)
- Biophysical
Systems Modeling and Sensor Development
- Modeling
of Microdialysis Processes and Systems used for In Vitro Experiments
- Nick
Kiritsis, Ph.D. Dissertation, August 1999
- 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 (pdf)
- Development
of Adaptive Transducer Based on Biological Sensory Mechanism
- Chayawee
Wangcharoenrung, Ph.D. Dissertation, May 2005
- Modeling
of the Mammalian Mechanism of Hearing (Wangcharoenrung,
M.S., May 1999)
- 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 (pdf)
Dynamic
System Modeling, Synthesis, and Testing
- Bond
Graph Modeling and Simulation Methods and Applications
- Design
of an Active Inertial Vibration Absorber for the Space Shuttle
Ergometer (Vinoo Naranayan, M.S., December 1994)
-
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 (pdf)
-
Longoria, R.G., Wave-Scattering Formalisms for Multiport Energetic
Systems, Journal of The Franklin Institute, Vol. 333(B), 1996,
No. 4, pp. 539-564 (pdf)
- A
Wave Scattering Approach for Modeling Switched Power Converters
(Javier A. Kypuros, M.S., May 1998)
- Variable
structure model synthesis for switched systems (Javier A.
Kypuros, Ph.D., May 2001)
- 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 (pdf)
- 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 (pdf)
- Bond
Graph Modeling of the Jeffcott Rotor (Joaquin Campos, M.S.,
August 2003)
- 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 (pdf)
- Modeling,
Simulation and Testing of Mechanical Systems
- Simulation
of Engineering Systems Described by High-Index DAE and Discontinuous
ODE Using Single Step Methods (Marc Compere, Ph.D., August 2001)
-
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 (pdf)
- Effects
of Constraint Representation on Computer Simulation Run Time
of Planar Mechanisms with Closed Loops (Raylon M. Yow, M.S.,
August 2002)
- Simulation
of dynamic systems with uncertain parameters (Fu Zhang, Ph.D.,
August 2004)
-
Evaluation and Modification of the TxDOT Mobile Load Simulator
(Michael Mosley, M.S., December 2005)
- Dynamic
System Synthesis and Design (using a Bond Graph Approach)
- Synthesis
of Multiple Energy Active Elements for Mechanical Systems
(Thomas J. Connolly, Ph.D., May 2000)
- A
Bond Graph Approach to Analysis, Synthesis, and Design of
Dynamic Systems (Seyoon Kim, Ph.D., December 2003)
- Connolly,
T.J.M., Longoria, R.G., A Bond Graph Based Approach for Active
Modeling and Synthesis of Dynamic Systems, Journal Of Dynamic
Systems, Measurement, And Control, 2007, Revised and re-submitted.
- Robust
synthesis of selectively constrained compliant mechanisms for
nano-precision machines
- Chinmaya
Patil, Ph.D., May 2008 (co-advised with S.V. Sreenivasan)
- Patil,
C.B., Sreenivasan, S.V., and Longoria, R.G., Parasitic Motion
in Flexure-based Mechanisms: Analysis of Nano-precision Translation
Stages, ASPE Journal of Precision Engineering, submitted November
2007.
-
Patil, C.B., Sreenivasan, S.V., and Longoria, R.G., Nano-scale
Parasitic Motion Analysis of Selectively Compliant Flexure-based
Mechanisms with Rotational DOFs, Journal of Mechanical Design,
submitted December 2007.
Fluid-Structure
Interaction
- Fluid-Structure
Interaction and Control
-
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 (pdf)
- Longoria,
J.J. Beaman and R.W. Miksad, An Experimental Investigation
of Forces Induced on Cylinders by Random Oscillatory Flow,
Journal Of Ofshore Mechanics And Arctic Engineering (ASME),Vol.
113, November 1991, No. 4, pp. 275-285 (pdf)
- 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 (pdf)
-
Comparison of Six Numerical Schemes for Solving Impulsively
Started Flow Around a Circular Cylinder (Chang-Ho Kang, May
1993)
- Optimal
control of hydroelastic oscillations of flexible structures
under time-dependent flow (Sanjay Rajagopalan, M.S. Thesis,
May 1994)
- Longoria,
R.G., A Methodology for Modeling Lift as a Modulated Process,
Journal of Offshore Mechanics and Arctic Engineering (ASME),
Vol. 118, February 1996, No. 1, pp. 21-28 (pdf)
- Tumer,
I.Y., R.G. Longoria, and K.L. Wood, Signal Analysis Using
Karhunen-Loeve Transformation: Application to Hydrodynamic
Forces, Journal of Offshore Mechanics and Arctic Engineering
(ASME), Vol. 122, August 2000, No. 3, pp. 208-213 (pdf)
- Impact
and Penetration, Hypervelocity Impact
- Generation
of Shock Waves by a Body During High-Speed Water Entry (Minhyung
Lee, Ph.D., December 1995, with Prof. D. Wilson)
- 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 (pdf)
-
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 (pdf)
- Application
of Cavity Expansion Analysis to Penetration Problems (Sikhanda
Satapathy, Ph.D., May 1997, with S. Bless, UT-IAT)
- Cavity
Expansion Analysis of Non-Circular Cross-Sectional Penetration
Problems (Hyung Je Woo, Ph.D.,
August 1997, with S. Bless, UT-IAT)
- Fluid
Dynamics
-
Study of turbulence in rotating flows (Charles Baroud, Ph.D.,
December 2001, co-advised with Prof. Harry Swinney, UT Austin,
Physics)
Mechatronics,
Electromechanics, and Power Systems
- Energy
storage for remote hybrid power generation systems
- Joaquin
Campos, Ph.D. (in progress)
- Electric
Ship Power Systems
- Optimization
of Switching for Electric Ship Power System Topologies (Chance
Meek, M.S., December 2004)
- Dynamic
Modeling and Analysis of an Automatic Reconfigurable Shipboard
Power System (Jerad Park, M.S., May 2006)
- 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
-
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
- Optimization
of Flywheel Energy Storage for Electric Shipboard Power Systems
(Mike Shasteen, M.S.)
- Power
Management for EBus, Fuel-Cell Powered Bus (with R. Thompons,
UT-CEM)
- Hearn,
C., Flynn, M., Lewis, M., Thompson, R., 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
-
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
- Prime
Mover and Energy Storage Considerations for a Hydrogen-Powered
Series Hybrid Shuttle Bus (Clay Hearn, M.S., expected May
2009)
- A
Moving Boundary Problem in a Distributed-Parameter System with
Application to Diode Modeling (Hanzhong Zhang, Ph.D., August 2001,
with Prof. M. Driga, UT ECE)
- 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 (pdf)
Vehicle
System Dynamics and Controls
- Small
unmanned ground vehicle modeling and simulation
- Statistical
Predictive Simulation Methods for Mobility of Unmanned Ground
Vehicles (Javier Solis, Ph.D.)
- Modeling
and Simulation of a Robotic Tracked Vehicle in Off-Road Terrains
(Javier Solis, M.S., May 2005)
- Solis,
J.M., Longoria, R.G.,Modeling Track-Terrain Interaction for
Transient Robotic Vehicle Maneuvers, Journal Of Terramechanics,
Accepted 2007.
- Online
Terrain Parameter Estimation for Small Scaled Tracked Vehicle
With Application to Packbot (Tehmoor Dar, Ph.D.)
-
Traction Force Models for Small-Scale Robotic Tracked Vehicles
(Tehmoor Dar, M.S., August 2005)
- Development
and Evaluation of a Real-Time Ground Tracked Vehicle Simulator
(Theodore 'Bud' Gilbert, M.S.)
- Modeling
the Rock/Running Gear Frictional Interface (Christiaan Best,
M.S., May 2005)
- Developing
and Interactive Tracked Vehicle Simulator (T. Gilbert, M.S.,
August 2008)
- Scale
vehicle system modeling and control
- Design
and Development of a Scaled Test Laboratory for the Study
of ABS and other Active Vehicle Systems (Amrou Al-Sharif,
M.S., August 2002)
- Implementation
of a Fuzzy Rule Based Algorithm for Adaptive Antilock Braking
in a Scaled Car (Anish Mathews, M.S. December 2002)
- Tire-surface
characterization for vehicle dynamics and control applications
(Gilberto Lopez, M.S., December 2002)
- Anti-lock
Brake System Re-design and Control Prototyping using a One-Fifth
Scale Vehicle Experimental Test-bed (Chinmaya Patil, M.S.,
August 2003)
- 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 (pdf)
- 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. (pdf)
- Vehicle
coordinated control and stability
- Coordinated
and Reconfigurable Vehicle Dynamics Control (Junmin Wang,
Ph.D., May 2007)
- Wang,
J., Longoria, R.G., Coordinated and Reconfigurable Vehicle
Dynamics Control, IEEE Transactions On Control System Technology,
2007, Revised and re-submitted.
-
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 (pdf)
- Other
vehicle modeling and simulation studies
-
Simulation and parameter sensitivity studies of skid-steering
and Ackerman steering on an eight-wheeled vehicle (Jarrett
Goodell, M.S., May 2004)
- Traction
Modeling in Continuously Variable Transmissions (Fernand Thomassy,
M.S., May 2006)
-
A Simulation Study Comparing Electric and Conventional Power
Trains on an All-Terrain Vehicle (Clark Anderson, M.S., December
1999)
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