 |
|
|||
|
| ||||
|
|
Dennis J. Tweten
Research Engineer
M.S.E., Mechanical Engineering,
Mr. Tweten is a Mechanical Engineering graduate from The University of Texas at Austin (UT) and LeTourneau University. Some of the relevant classes he has taken are Introduction to Modern Control, Control Systems Design, Estimation Theory, two Modeling of Mechanical Systems courses, Circuits I and II, Introduction to Micro Controllers, two Mechatronics courses, Machine Design, Fundamentals of Heat and Mass Transfer, and Vibrations.
For his thesis, Mr. Tweten created a thermal and electrical model with post processor of the electrode of the Electroslag Remelting (ESR) process. The numerical model was written in C++, and the post processor was created in both OpenDX and MATLAB®. The thermal model included a moving boundary condition and a radiation boundary condition. The model was verified using the experimental data from two separate melts. The resulting model and post processor were created to be used by professionals in the metal refining industry and included a user's manual.
In collaboration with his research at UT, Mr. Tweten worked for Sandia National Laboratories. In addition to the responsibilities of creating an ESR model, he helped conduct experimental ESR melts of both industrial and lab scale size. He also presented results of his research to meetings of the Special Metals Processing Consortium.
At SwRI, Mr. Tweten was part of a design team that redesigned a Motorized Antenna Assembly (MAA) for an unmanned aerial vehicle. The new MAA was redesigned to be less expensive, to be easier to manufacture, and to self position at startup. Mr. Tweten was responsible for design concepts, material and part selection, and scripting the self positioning sequence. He was also involved in building and testing a prototype using rapid prototyping techniques.
Mr. Tweten has supported Boeing’s effort to integrate 30mm guns onto the AC130 by modeling and analysis at SwRI. He created a nonlinear and linear model in Simulink® and MATLAB respectively of the Trainable Gun Mount (TGM) with 30-mm Gun and the TGM controls for this support effort. The purpose of the nonlinear model is to evaluate the TGM controls under flight loads with gunfire events before the TGM is physically installed and tested on the aircraft. The nonlinear model includes flight loads, hydraulic and servo valve effects, nonlinear dynamics such as coriolis and gyroscopic effects, force/time history of gunfire events, and digital control effects. Mr. Tweten adjusted the nonlinear model to match actual TGM test results. The purpose of the linear model is to support the design and tuning of the TGM controls. The linear model can be used to generate step responses, root locus plots, and bode plots. Mr. Tweten supported Boeing in the development of the TGM controls and controls tuning by running simulations from both models and providing recommendations to Boeing.
Mr. Tweten has experience with programming in C++, OpenDX, and
JavaScript. In addition, he is proficient with MATLAB and Simulink and
Microsoft Office®.
For more information about compressor system and pump system analyses
capabilities at SwRI or how you can contract with SwRI,
please contact
Buddy
Broerman at
ebroerman@swri.org or (210) 522-2555. We can offer
you the best approach for solving your compressor system or pump system
analysis problem. |
|
||
|
| Fluids and Machinery Engineering Department | Mechanical Engineering Division | SwRI Home | |
||||
|
Southwest Research Institute® (SwRI®), headquartered in San Antonio, Texas, is a multidisciplinary, independent, nonprofit, applied engineering and physical sciences research and development organization with 12 technical divisions. |
||||
|
©Southwest Research Institute® October 23, 2009 |
||||
