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UG RA: T. Femi-Fowode & F. Obasuyi

TAMU SYSTEM PATHWAY SYMPOSIUM, 2008
2nd PLACE (UG- Division)
Evaluation of Coefficient of Friction of Thermal Battery Insulators
Taiwo Femi-Fowode, Fiona Obasuyi, Babatunde Ekundayo, Seun Walker
Advisor: DR. Irvin Osborne Lee

Synopsis: Thermal batteries are primary reserve batteries that are solid state at normal temperature. They have been the first choice of power supply for guided missiles and nuclear weapons. The aim of the work is to improve the knowledge base of material property data on thermal battery insulators. For this research the material property that was evaluated was the coefficient of friction, to determine the displacement of the battery component at high stress when the missile is in operation. The coefficient of friction is used to approximate the force of friction, which is determined by the ease with which two surfaces slide against each other. The angle at which an object begins to slide down an incline, when measured is used to determine the coefficient of friction, μ. The frictional force is the force that resists the sliding motion of one surface over another. In this experiment the frictional force between the surface on the base material on the incline plane and the sample material was measured.

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*CECSTR NEWS***
Northrop Grumman Donates $20,000 to CECSTR (2009-10 and 2010-11 Academic year)
*Outstanding Student Awards* Ranked by Dean Kendal T. Harris, left, Dr. John Attia, second from right, and Dr. J. Zhou, far right, are three recent advanced degree earners. Next to Dr. Harris is Emad Awada, earned Ph.D in Electrical Engineering in 2010, Craig Bazil and Henry Gonzalez, are earning MS in Electrical Engineering and MS in Mechanical Engineering respectively. Emad Awada, earned “outstanding doctoral student” and Craig Bazil, earned “outstanding master student” recognition in electrical engineering in 2010 from the College of Engineering.
Graduate RA: Chu Liu and Chao Xia TAMU SYSTEM PATHWAY SYMPOSIUM, 2008 1st PLACE (Graduate Division) Programmable Dead-time and Phase-shift Digital Controller by Using FPGA Research Assistants (G): Chu Kuang Liu , Chao Xia Advisors: Dr. SuXia Cui Dr. Yongpeng Zhang, and Dr. Cajetan M. Akujuobi Synopsis: This project describes an engineering project with simulation for a digital control module of the DC/DC Phase-shift Full Bridge Converter by using FPGA (Field Programmable Gate Array) in Xilinx environment with VHDL codes. The digital control module is developed to control the dead-time (Td) to achieve the ZVS (Zero Voltage Transition) in the Full-Bridge DC/DC converters and it is also able to shift the phase of the PWMs (PWMA,PWMB,PWMC,PWMD) with Tf to adjust the duty-cycle of the DC/DC converter by feedback to regulate the output voltage. This digital control module with FPGA technology will be used on the future research for the digital-control power architecture as to compare the performance with other digital controllers (DSP ,Micro controller).	UG RA: T. Femi-Fowode & F. Obasuyi TAMU SYSTEM PATHWAY SYMPOSIUM, 2008 2nd PLACE (UG- Division) Evaluation of Coefficient of Friction of Thermal Battery Insulators Taiwo Femi-Fowode, Fiona Obasuyi, Babatunde Ekundayo, Seun Walker Advisor: DR. Irvin Osborne Lee Synopsis: Thermal batteries are primary reserve batteries that are solid state at normal temperature. They have been the first choice of power supply for guided missiles and nuclear weapons. The aim of the work is to improve the knowledge base of material property data on thermal battery insulators. For this research the material property that was evaluated was the coefficient of friction, to determine the displacement of the battery component at high stress when the missile is in operation. The coefficient of friction is used to approximate the force of friction, which is determined by the ease with which two surfaces slide against each other. The angle at which an object begins to slide down an incline, when measured is used to determine the coefficient of friction, μ. The frictional force is the force that resists the sliding motion of one surface over another. In this experiment the frictional force between the surface on the base material on the incline plane and the sample material was measured.	Dr. Emad Awada (Graduate Assistant, 2005-2010) TAMU SYSTEM PATHWAY SYMPOSIUM, 2006 2ND PLACE Wavelet-Based ADC Mixed Signal Testing P.I: Dr. Cajetan M. Akujuobi, RA: Emad Awada Synopsis: In today's advanced signal processing, most applications are performed in electronic systems (digital signal processing), where mixed signal analog-to-digital converters (ADCs) play an important role as a gateway between the digital world and the real world (analog). Therefore, ADC performance testing is important to ensure the integrity and the performance of the entire mixed signal systems. However, ADC testing is extremely expensive and time consuming due to the significant number of sampling data required by the conventional methods of testing (fast Fourier transform and sine-wave histogram). Therefore, a new technique of testing has been explored and developed to test mixed signal analog-to-digital converters parameters (ENOB and DNL) utilizing LabView software for automated testing and Wavelet Transform Technique for superior testing qualities (i.e., less time consumption, sampling points, data storage, and over all less cost) info>
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