Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 26 for “"closed-loop control system"”.
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Development of a Closed Loop Control System for Vibratory Milling
… can lead to improvements when applied in a controlled manner. Vibration assisted machining is a technique in which a certain frequency of vibration is applied to the cutting tool or the Workpiece to achieve better cutting performance The aim of this project is to apply vibration to the …
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Development of A closed Loop Control System for Vibration Assisted Grinding
… approach, i.e. the process to be quantitatively controlled and optimized rather than carried out in a trial-and-error manner. Vibration assisted machining been has demonstrated to reduce the amount of forces, pattern definition on a finished surface. Axial oscillation (parallel to the wheel axis) …
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Control of Longitudinal Pitch Rate As Aircraft Center of Gravity Changes
… pitch stability decreases and the sensitivity to control input increases. This increase in sensitivity is known as pitch gain variance. Minimizing the pitch gain variance results in an aircraft with consistent handling characteristics across a broad range of center of gravity locations. This …
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Multivariable control of a rougher flotation cell
… investigation, development and evaluation of a closed loop control system on a rougher flotation cell that could improve PGM flotation performance. A PGM rougher flotation cell equipped with Online Stream Analysis (OSA) and machine vision system (SmartFroth) was used during the investigation. …
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Laser Range Finder Mapping of Floating Vehicle
… of their expected values. With this algorithm, a closed-loop control system is also developed and implemented on the vehicle. The vehicle is able to move to a predefined location and be within a very small range of acceptable values. The control loop is further explored with damping, gain …
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Stable fraction approach and Computer-Aided Design of Control Systems
Algebraic approach to the feedback system design is reviewed towards the development of a Computer Aided Design of Control Systems package in a single-variate setting. In the solutions of both the problems presented here, we endeavor to give a complete parameterization of the set of compensators …
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Spectral graph theory analysis of software-defined networks to improve performance and security
… by providing unprecedented visibility into and control over data communication networks. The focus of this work is to develop a method to extract network features, develop a closed-loop control framework for a software-defined network, and build a test bed to validate the proposed scheme. The …
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Verification of Digital Controller Verifications
… framework to verify the stablility property of a closed-loop control system with a software controller implementation. The usual approach to verifying stability for software uses experiments which are costly and can be dangerous. More recently, mathematical models of software have been proposed …
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Passivity-Based adaptive bilateral teleoperation control for uncertain manipulators without jerk measurements
… teleoperation problem of cooperative robotic systems in a Single-Master Multi-Slave (SM/MS) configuration, which is able to perform load transportation tasks in the presence of parametric uncertainty in the robot kinematic and dynamic models. The teleoperation architecture is based on the …
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High Step-Up/Down Transformerless Multilevel Converter for Renewable Energy Applications
… (MMC) that would be applicable to dc power systems. The design achieves high voltage ratios for interfacing renewable energy sources such as photovoltaic and line interactive Uninterruptible Power System (UPS) systems. The circuit topology provides for high step-up/down dc-dc conversion …
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Closed-loop, variable-valve-timing control of a controlled-auto-ignition engine
The objective of this study was to develop a closed-loop controller for use on a Controlled-Auto- Ignition (CAI) / Spark-Ignition (SI) mixed mode engine equipped with a variable-valve-timing (VVT) mechanism. The controller in this study was designed only for use in the CAI regime. Operation in the …
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Mechanical design of an automated vehicle driving system for drive cycle testing
… process for an automated drive cycle testing system. Drive cycle is a graph containing series of vehicle speed data versus time. The main reason for drive cycle existence is to analyse the air pollution that is emitted by vehicle engines through combustion process. It is also can be used as a …
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Telescopes and Techniques for the High-Resolution Characterisation of Exoplanets
… actuators driven by my software in a closed loop control system. Finally, I also prototyped and tested potentially novel primary mirror optics that were invented to improve the compactness/practicality of this alignment technology.
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Green Manufacturing and Direct Recycling of Lithium-Ion Batteries
… are manufactured and direct recycled to form a closed loop. The water-based cathode electrode delivers comparable cycle life and rate performance to the ones from the conventional organic solvent-based process. The direct recycling process has the advantages to regenerate the cathode material …
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Two-channel surface stimulation for the correction of drop foot.
… during loading. Traditional transcutaneous FES systems require the accurate positioning of surface electrodes on the skin so that the appropriate nerves are activated to give the desired muscle response. Many people find electrode positioning difficult. 2 This project examined the feasibility of …
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Design of a slurry layer forming station and improved fluid handling system for raster processes in 3DP®
… components, including the forcers, centering system, and interface software. And speaking of rastering, dry-powder 3DPTM relies on this strategy for printing binder, just as the LFS uses a raster method to build powder layers. Beginning with observations made during the design of the LFS, the …
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Integrated perception, modeling, and control paradigm for bistatic sonar tracking by autonomous underwater vehicles
… optimize tracking performance. Next, a vehicular control strategy, called the Perception-Driven Control, is devised to move the AUV in reaction to the track report provided by the Automated Perception. The thesis develops a new non-myopic and adaptive control for the vehicle. This is achieved by …
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An investigation into vibration assisted machining : application to surface grinding processes
… preliminary studies. However, a novel-improved system was designed and manufactured in order to undertake the full volume of experimental work. A number of simulations including stress and modal analysis were carried out and all the static and dynamic characteristics of the rigs were identified. …
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A Power Conditioning System for Superconductive Magnetic Energy Storage based on Multi-Level Voltage Source Converter
A new power conditioning system (PCS) for superconductive magnetic energy storage (SMES) is developed and its prototype test system is built and tested. The PCS uses IGBTs for high-speed PWM operation and has a multi-level chopper-VSC structure. The prototype test system has three-level that can …
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Computer aided design and construction of a multi-point positioning actuator system
This thesis investigates the development, control, modelling and analysis of single-phase tubular linear induction actuators (TLIA) for the application of multi-point positioning.<br/><br/>A novel TLIA has been successfully developed in the research project. This actuator makes use o f the …
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