Browsing by Author/Contributor "Fales, Roger"
Now showing items 1-20 of 38
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Applying and analyzing robust modern control on uncertain hydraulic systems
Bax, Brian (University of Missouri--Columbia, 2006)In this work modern robust control systems are designed and compared to standard techniques for a hydraulic implement system. The system includes an independent metering valve (IMV) and a variable displacement pump. The ... -
Attenuation of low frequency pressure pulsations
Xu, Jian (University of Missouri--Columbia, 2021)In this thesis, the concept of hydraulic pulsating filter is explored and developed. The filter or resonator is designed to attenuate the pulsation that occurs when the hydraulic pump is discharged. Pumps pulsate over a ... -
Automatic oxygen controller design for premature infants with clinical evaluation
Hou, Xuefeng (University of Missouri--Columbia, 2020)[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI--COLUMBIA AT REQUEST OF AUTHOR.] For premature infants, the peripheral oxygen saturation (SpO2) level has significant effects on their health. Manual adjustment of fraction ... -
Chatter detection and prevention in high-speed milling
Kennedy, Joseph L. (University of Missouri--Columbia, 2011)In this work, two separate mathematical models, a traditional and new model, are presented for an end-milling process. The traditional model assumes circular tool motion, while the new model accounts for trochoidal tool ... -
Condition monitoring of an axial piston pump utilizing the Kalman filter
Shinn, Tyler Andrew (University of Missouri--Columbia, 2018)Condition monitoring of a hydraulic pump is an essential process for maximum operational time and pump life longevity. One method of condition monitoring is to estimate parameters characterized by flow losses. Even in a ... -
Control of arterial hemoglobin saturation in premature infants using H-infinity synthesis and performance specifications from best clinical practice
Quigley, Daniel (University of Missouri--Columbia, 2013)This work details the development of a novel control system for regulating the Arterial Hemoglobin saturation (SpO2) of premature infants. An H-infinity synthesis method was used to derive multiple controllers to cover a ... -
Design and clinical testing of a control system and event prediction system for premature babies in the NICU.
Runge, Brooklin Christine (University of Missouri--Columbia, 2023)The presented work is a thesis used as evidence towards defending a master's degree in the department of Electrical Engineering at the University of Missouri, Columbia. The project presented centers around automating the ... -
Design of a simple drive train and control system for an oxygen blend valve for use with premature infants
Pierce, Erik (University of Missouri--Columbia, 2022)Automating the regulation of the fraction of inspired oxygen (FiO2) in neonatal mechanical ventilation shows great promise of providing better patient outcomes. Historically, controlling the FiO2 valve has required manual ... -
Design of an Efficient Controller for Arterial Oxygen Saturation in Neonatal Infants
Alkurawy, Lafta E. (University of Missouri--Columbia, 2013)A main problems for premature infants is respiratory distress syndrome (IRDS), also called neonatal respiratory distress syndrome, or respiratory distress syndrome of newborn. Due to IRDS, the infant requires intervention ... -
Design optimization and efficiency modeling of a hot gas vane motor
Bommarito, Gregory (University of Missouri--Columbia, 2007)The purpose of this research is to model and analyze the dynamics of a hot gas vane motor for design optimization work. The pneumatic motor is a portable direct drive actuator that is intended as an alternative to ... -
Developing and automating time delay system stability analysis of dynamic systems using the Matrix Lambert W (MLW) function method
Pietarila, Kristel M., 1976- (University of Missouri--Columbia, 2009)Stability analysis of time-delayed (TD) systems is not easy to conduct since the addition of delays within a dynamic model results in irrational system equations. Traditional TD analysis methods involve adding approximations ... -
Effect of chip thickness, sub-critical bifurcations and process parameters in high-speed milling
Radhakrishnan, Anupam, 1979- (University of Missouri--Columbia, 2010)[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] The main focus of the current research is to experimentally and numerically investigate of subcritical bifurcations in milling accounting for actual ... -
Effects of machining system parameters and dynamics on quality of high-speed milling
Adem, Khaled A. M. (University of Missouri--Columbia, 2013)This dissertation outlines research on studying the effects of machining parameters such that cutting speed, feed rate, axial depth of cut, radial depth of cut and helix angle on system dynamic stability and the surface ... -
Estimation of model states for a hydraulic valve system using an extended Kalman filter
Al-Naseri, Ahmed (University of Missouri--Columbia, 2017)[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Pilot valves are considered as one of most common types of valves in the industry today. They are widely-used because their design is simple, they are ... -
Force control of a hydraulic servo system
Kennedy, Joseph L. (University of Missouri--Columbia, 2009)The objective of this thesis is to model a hydraulic servo system using force control and then improve upon the performance of the model/system through feedback control design. The hydraulic system is first constructed and ... -
Force feedback control of a hydraulic cylinder [abstract]
McDonald, C. J.; Fales, Roger (University of Missouri--Columbia. Office of Undergraduate Research, 2008)The objective of this thesis is to demonstrate improvements in the response of a physical hydraulic system when using closed-loop control. A hydraulic system consisting of a power supply, accumulator, and linear actuator ... -
Fourier transforms applied to a hydraulic system [abstract]
Keim, Timothy; Fales, Roger (University of Missouri--Columbia. Office of Undergraduate Research, 2008)Control valves (i.e. poppet valves) are commonly used in hydraulic systems for accurate control of the system response. These valves can only provide accurate responses for a limited frequency range. The bode plot is a ... -
Hydraulic efficiency of a hydrostatic transmission with a variable displacement pump and motor
Coombs, Daniel (University of Missouri--Columbia, 2012)Pumps and motors are commonly connected hydraulically to create hydrostatic drives, also known as hydrostatic transmissions. A typical hydrostatic transmission consists of a variable displacement pump and a fixed displacement ... -
Hysteresis and dither in a metering poppet valve [abstract]
Kennedy, Joseph L.; Fales, Roger (University of Missouri--Columbia. Office of Undergraduate Research, 2007)The objective of the following thesis is to reduce the hysteresis of a hydraulic flow control valve through the use of dither. A hydraulic valve system, used in controlling the valve and collecting and converting the ... -
Inlet metering pump analysis and experimental evaluation with application for flow control
Ali, Hasan H. (University of Missouri--Columbia, 2017)Axial piston pumps with variable volumetric displacement are often used to control flow and pressure in hydraulic systems. The displacement control mechanism in these pumps occupies significant space and accounts for ...