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Articles 121 - 150 of 593
Full-Text Articles in Mechanical Engineering
Robust Impedance Control Of A Four Degree Of Freedom Exercise Robot, Santino Joseph Bianco
Robust Impedance Control Of A Four Degree Of Freedom Exercise Robot, Santino Joseph Bianco
ETD Archive
The CSU 4OptimX exercise robot provides a platform for future research into advanced exercise and rehabilitation. The robot and its control system will autonomously modify reference trajectories and impedances on the basis of an optimization criterion and physiological feedback. To achieve this goal, a robust impedance control system with trajectory tracking must be implemented as the foundational control scheme. Two control laws will be compared, sliding mode and H-infinity control. The above robust control laws are combined with underlying impedance control laws to overcome uncertain plant model parameters and disturbance anomalies affecting the input signal. The sliding mode control law …
Design And Manipulation Of A Power-Generating System With High-Temperature Fuel Cells For Hypersonic Applications, Jack Randolph Chalker
Design And Manipulation Of A Power-Generating System With High-Temperature Fuel Cells For Hypersonic Applications, Jack Randolph Chalker
Browse all Theses and Dissertations
Current hypersonic vehicles tend to be incapable of producing onboard power with traditional generators due to their use of supersonic combusting ramjets (scramjets). Because of this, they seek additional energy sources for supporting advanced electronics or other auxiliary power-dependent devices while requiring elaborate thermal management systems to combat temperatures exceeding 700ºC. The incorporation of Solid Oxide Fuel Cell (SOFCs) stacks is an efficient solution, capable of generating large quantities of power through the use of natural fuel sources at high temperatures. Developments in this thesis include the design, construction, and support of a system operating at hypersonic-environment conditions with a …
Design And Implementation Of Periodic Unsteadiness Generator For Turbine Secondary Flow Studies, Nathan James Fletcher
Design And Implementation Of Periodic Unsteadiness Generator For Turbine Secondary Flow Studies, Nathan James Fletcher
Browse all Theses and Dissertations
A primary source of periodic unsteadiness in low-pressure turbines is the wakes shed from upstream blade rows due to the relative motion between adjacent stators and rotors. These periodic perturbations can affect boundary layer transition, secondary flow, and loss generation. In particular, for high-lift front-loaded blades, the secondary flowfield is characterized by strong three-dimensional vortical structures. It is important to understand how these flow features respond to periodic disturbances. A novel approach was taken to generate periodic unsteadiness which captures some of the physics of turbomachinery wakes. Using stationary pneumatic devices, pulsed jets were used to generate disturbances characterized by …
Development Of Physics Based Machine Learning Algorithms, Rob Jennings
Development Of Physics Based Machine Learning Algorithms, Rob Jennings
Master’s Theses
In this study, a baseball pitch was examined to try to understand its behavior, and make a predictive model of it. A baseball pitch was tested experimentally with a wind tunnel and modeled computationally with COMSOL CFD software. Five input variables (spin rate, sting angle, seam orientation: Y axis, seam orientation: Z axis, and air velocity) were controlled, with force in three axes recorded as outputs. The experimental and computational results were examined and seen to be interdependent for all input variables. Experimental and computational data were both insufficient for predicting system behavior. Experimental data collection would have required an …
Reactive Archey Target Design Team "Mimic", Brandon Croyle, Jacob Boss, David Rodgers, Austin Wivell
Reactive Archey Target Design Team "Mimic", Brandon Croyle, Jacob Boss, David Rodgers, Austin Wivell
Williams Honors College, Honors Research Projects
This design project will aim to provide archery hunters with a platform to simulate shooting at string jumping deer. String jumping refers to a spooked deer hearing the snap of a bow string and instintivly ducking up to ten inches. This often results in wounded or missed deer. We will design and build a control system that uses the sound of a bow string as a trigger to operate a mechanical target system. A sound sensor will mimic a deer’s hearing in close range hunting and then send a signal to the mechanical system to replicate the dropping motion of …
Power/Thermal Interaction Within An Adaptive Turbine Engine, Andrew K. Desomma
Power/Thermal Interaction Within An Adaptive Turbine Engine, Andrew K. Desomma
Browse all Theses and Dissertations
Usually power take off (PTO) with a two-spool turbofan engine has been accomplished via the high pressure (HP) shaft and bleed air from the high-pressure compressor (HPC). The PTO is used to run various aircraft components such as generators and hydraulic pumps, which also produce waste heat. To better understand the coupled transient nature of balancing engine thrust, power take off and thermal management, a transient variable cycle three stream turbofan engine model has been developed to investigate the integrated behavior. The model incorporates many dynamic features including a third-stream heat exchanger as a heat sink for thermal management and …
Proceedings Of The 19th Annual Early Career Technical Conference (Front Matter), Ectc Coordinating Committee
Proceedings Of The 19th Annual Early Career Technical Conference (Front Matter), Ectc Coordinating Committee
Early Career Technical Journal (ECTJ)
Proceedings of the 19th Annual Early Career Technical Conference, November 2-3, 2019. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. i-xii
Section 1: Materials & Design, Ectc Coordinating Committee
Section 1: Materials & Design, Ectc Coordinating Committee
Early Career Technical Journal (ECTJ)
Proceedings of the 19th Annual Early Career Technical Conference, November 2-3, 2019. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. 1-21
Section 2: Materials & Testing, Ectc Coordinating Committee
Section 2: Materials & Testing, Ectc Coordinating Committee
Early Career Technical Journal (ECTJ)
Proceedings of the 19th Annual Early Career Technical Conference, November 2-3, 2019. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. 22-41
Section 3: Robotics & Computing, Ectc Coordinating Committee
Section 3: Robotics & Computing, Ectc Coordinating Committee
Early Career Technical Journal (ECTJ)
Proceedings of the 19th Annual Early Career Technical Conference, November 2-3, 2019. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. 42-75
Section 4: Sustainability & Design, Ectc Coordinating Committee
Section 4: Sustainability & Design, Ectc Coordinating Committee
Early Career Technical Journal (ECTJ)
Proceedings of the 19th Annual Early Career Technical Conference, November 2-3, 2019. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. 76-95
Section 6: Thermal Sciences, Ectc Coordinating Committee
Section 6: Thermal Sciences, Ectc Coordinating Committee
Early Career Technical Journal (ECTJ)
Proceedings of the 19th Annual Early Career Technical Conference, November 2-3, 2019. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. 113-145
Section 5: Materials, Ectc Coordinating Committee
Section 5: Materials, Ectc Coordinating Committee
Early Career Technical Journal (ECTJ)
Proceedings of the 19th Annual Early Career Technical Conference, November 2-3, 2019. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. 96-112
Proceedings Of The 19th Annual Early Career Technical Conference (Complete Issue), Ectc Coordinating Committee
Proceedings Of The 19th Annual Early Career Technical Conference (Complete Issue), Ectc Coordinating Committee
Early Career Technical Journal (ECTJ)
Proceedings of the 19th Annual Early Career Technical Conference, November 2-3, 2019. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama
Optimization Of Mechanical Properties In Magnesium Zinc Alloys, Christopher Hale, Zhigang Xu, Honglin Zhang, Sergey Yarmolenko, Jagannathan Sankar
Optimization Of Mechanical Properties In Magnesium Zinc Alloys, Christopher Hale, Zhigang Xu, Honglin Zhang, Sergey Yarmolenko, Jagannathan Sankar
Early Career Technical Journal (ECTJ)
Section 1: Materials & Design; pp. 3-7
High Strain-Rate Sensitivity And Energy Absorption Of Duroprotect, A Fiber-Reinforced Ballistics Composite, Ivy Turner, Rowan Baird, Sofia Serafin, Birendra Chaudhary, Jose Torrado, Damian Stoddard
High Strain-Rate Sensitivity And Energy Absorption Of Duroprotect, A Fiber-Reinforced Ballistics Composite, Ivy Turner, Rowan Baird, Sofia Serafin, Birendra Chaudhary, Jose Torrado, Damian Stoddard
Early Career Technical Journal (ECTJ)
Section 1: Materials & Design; pp. 8-14
Section 7: Numerical Methods, Ectc Coordinating Committee
Section 7: Numerical Methods, Ectc Coordinating Committee
Early Career Technical Journal (ECTJ)
Proceedings of the 19th Annual Early Career Technical Conference, November 2-3, 2019. School of Engineering, University of Alabama at Birmingham, Birmingham, Alabama; pp. 146-178
On The Design And Development Of A Monolithic Compliant Gripper And Serial Closed Loop Chain Mechanism, Martin Garcia, Ayse Tekes
On The Design And Development Of A Monolithic Compliant Gripper And Serial Closed Loop Chain Mechanism, Martin Garcia, Ayse Tekes
Early Career Technical Journal (ECTJ)
Section 1: Materials & Design; pp. 16-21
Machine Design Companion Using Matlab, Paul Pena, Mir Atiqullah
Machine Design Companion Using Matlab, Paul Pena, Mir Atiqullah
Early Career Technical Journal (ECTJ)
Section 1: Materials & Design; p. 15
Study Of The Shift In Material Properties Due To Structural Damage In Bio-Composites, Gavin Stockstill, Maharshi J. Dave, Tejas Pandya, Jason Street
Study Of The Shift In Material Properties Due To Structural Damage In Bio-Composites, Gavin Stockstill, Maharshi J. Dave, Tejas Pandya, Jason Street
Early Career Technical Journal (ECTJ)
Section 2: Materials & Testing; pp. 24-26
Dynamic Response Of Porous Metallic And Polymeric Foams For Enhancing Energy Absorption Under High Strain-Rates, Suman Babu Ukyam, Damian Stoddard, P Raju Mantena
Dynamic Response Of Porous Metallic And Polymeric Foams For Enhancing Energy Absorption Under High Strain-Rates, Suman Babu Ukyam, Damian Stoddard, P Raju Mantena
Early Career Technical Journal (ECTJ)
Section 2: Materials & Testing; p. 33
Dynamic Compressive Behavior And Energy Absorption Of Ethylene Polyurethane Diene Monomer Foam Using Split Hopkinson Pressure Bar Technique, Rowan E. Baird, Mason Tudor, Damian Stoddard
Dynamic Compressive Behavior And Energy Absorption Of Ethylene Polyurethane Diene Monomer Foam Using Split Hopkinson Pressure Bar Technique, Rowan E. Baird, Mason Tudor, Damian Stoddard
Early Career Technical Journal (ECTJ)
Section 2: Materials & Testing; pp. 27-32
Comparative Analysis And Dynamic Response Of Garolites Under Temperature Spectrum Using Low Velocity Impact Test, Birendra Chaudhary, Suman Babu Ukyam, Damian Stoddard
Comparative Analysis And Dynamic Response Of Garolites Under Temperature Spectrum Using Low Velocity Impact Test, Birendra Chaudhary, Suman Babu Ukyam, Damian Stoddard
Early Career Technical Journal (ECTJ)
Section 2: Materials & Testing; pp. 34-41
Autonomous Vehicle Simulation Using Open Source Software Carla, Emily Barbour, Kevin Mcfall
Autonomous Vehicle Simulation Using Open Source Software Carla, Emily Barbour, Kevin Mcfall
Early Career Technical Journal (ECTJ)
Section 3: Robotics & Computing; pp. 50-57
Comparison Of Dense Descriptors For Image Enhancement, Mohsime Taarji, Arie Nakhmani
Comparison Of Dense Descriptors For Image Enhancement, Mohsime Taarji, Arie Nakhmani
Early Career Technical Journal (ECTJ)
Section 3: Robotics & Computing; pp. 44-49
Development Of A Pre-Processing Tool For The 3d Eulerian Code Aleas, Yasir A. Alfawzan, Kenneth Walls
Development Of A Pre-Processing Tool For The 3d Eulerian Code Aleas, Yasir A. Alfawzan, Kenneth Walls
Early Career Technical Journal (ECTJ)
Section 3: Robotics & Computing; pp. 62-67
Real-Time Virtual Remotely Operated Vehicle, Tyler Gragg, Kevin Mcfall
Real-Time Virtual Remotely Operated Vehicle, Tyler Gragg, Kevin Mcfall
Early Career Technical Journal (ECTJ)
Section 3: Robotics & Computing; pp. 58-61
Developing Semi-Autonomous Flight Control Software For A Meta Aircraft Of Two Fixed Wing Aircraft With A Raspberry Pi + Navio2 Flight Controller, Maxwell J. Cobar, Carlos J. Montalvo
Developing Semi-Autonomous Flight Control Software For A Meta Aircraft Of Two Fixed Wing Aircraft With A Raspberry Pi + Navio2 Flight Controller, Maxwell J. Cobar, Carlos J. Montalvo
Early Career Technical Journal (ECTJ)
Section 3: Robotics & Computing; pp. 68-75
Exploring Methodology For Development Of Sustainable Construction Management Processes In Puerto Rico, Magdelena Krstanoski, Rafael Melendez
Exploring Methodology For Development Of Sustainable Construction Management Processes In Puerto Rico, Magdelena Krstanoski, Rafael Melendez
Early Career Technical Journal (ECTJ)
Section 4: Sustainability & Design; pp. 78-83
Design Of A Novel Compliant Knee Joint And Swimming Robot: Preliminary Results, Niko Giannakakos, Joshua Hooper, Andy Houghton, Ayo Ajayi, Mason Mccun, Ayse Tekes
Design Of A Novel Compliant Knee Joint And Swimming Robot: Preliminary Results, Niko Giannakakos, Joshua Hooper, Andy Houghton, Ayo Ajayi, Mason Mccun, Ayse Tekes
Early Career Technical Journal (ECTJ)
Section 4: Sustainability & Design; pp. 84-87