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Rozprawy doktorskie na temat „Active magnetic attitude control”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 7 lutego 2022

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1

Giesselmann, Jens Uwe Michael, and jens giesselmann@gmx net. "Development of an Active Magnetic Attitude Determination and Control System for Picosatellites on highly inclined circular Low Earth Orbits." RMIT University. Aerospace, Mechanical and Manufacturing Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20070514.162516.

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Small satellites are becoming increasingly important to the aerospace industry mainly due to their significantly reduced development and launch cost as well as shorter development time frames. In order to meet the requirements imposed by critically limited resources of very small satellites, e.g. picosatellites, innovative approaches have to be taken in the design of effective subsystem technologies. This thesis presents the design of an active attitude determination and control system for flight testing on-board the picosatellite 'Compass-1' of the University of Applied Sciences Aachen, Germa

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Bellini, Niccolo'. "Magnetic actuators for nanosatellite attitude control." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7506/.

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The research and the activities presented in the following thesis report have been led at the California Polytechnic State University (US) under the supervision of Prof. Jordi Puig Suari. The objective of the research has been the study of magnetic actuators for nanosatellite attitude control, called magnetorquer. Theese actuators are generally divided in three different kinds: air core torquer, embedded coil and torquerod. In a first phase of the activity, each technology has been analyzed, defining advantages and disadvantages, determining manufacturing procedures and creating mathematical

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Chen, Hung-Hsu Fred. "Ride and attitude control of active suspensions /." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487678444256792.

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Lundh, Joachim. "Model Predictive Control for Active Magnetic Bearings." Thesis, Linköpings universitet, Reglerteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-81325.

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This thesis discuss the possibility to position control a rotor levitated with active magnetic bearings. The controller type considered is model predictive control which is an online strategy that solves an optimization problem in every sample, making the model predictive controller computation-intense. Since the sampling time must be short to capture the dynamics of the rotor, very little time is left for the controller to perform the optimization. Different quadratic programming strategies are investigated to see if the problem can be solved in realtime. Additionally, the impact of the choic

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5

You, Silu. "Adaptive Backstepping Control of Active Magnetic Bearings." Cleveland State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=csu1273679767.

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6

Li, Peichao. "Active touchdown bearing control in magnetic bearing systems." Thesis, University of Bath, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678846.

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Khader, Shahbaz Abdul. "System Identification of Active Magnetic Bearing for Commissioning." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-243630.

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Active magnetic bearing (AMB) is an ideal bearing solution for high performance and energy efficient applications. Proper operation of AMB can be achieved only with advanced feedback control techniques. An identified system model is required for synthesizing high performance model based controllers. System identification is the preferred method for obtaining an accurate model. Therefore, it becomes a prerequisite for the commissioning of AMB. System identification for commissioning poses some challenges and special requirements. In this thesis, system identification of AMB is approached within

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8

Pappagallo, Isabella. "Numerical investigation of magnetic only attitude control for small satellites." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18306/.

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The subject of the thesis research is the study of the attitude control for small satellites actuated by only magnetorquers, which presents interesting control challenges due to the time-variance and underactuation of the system. It is indeed known that for underactuated systems, the presence of external disturbances can lead to system instability. Even if the problem of finding a robust non-linear global controller has been already investigated, there is still room for improvements. In this regard, the present work proposes a solution in which the elements of the averaging theory for a syst

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9

Lehner, Maximilian Jacob. "Study and design of magnetic attitude control systems for nanosatellites." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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The objective of this bachelor thesis was to display all the attitude and control systems (ACS) available for CubeSats and how magnetic ACS are the most convenient option in terms of volume. Precisely this project focused on the procedure, the design and the laws of physics that are behind the creation of a torque rod, a magnetic attitude and control system conceived for nanosatellites. After discussing the magnetic laws, the different types of materials of the core, and the geometric parameters of the core and of the wire, all of which determine the operating area of the system, a theoretica

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10

Zhou, F. B. "Transputer-based digital control of an active magnetic bearing system." Thesis, University of Salford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360386.

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Baldi, Pietro <1981&gt. "Fault detection, diagnosis and active fault tolerant control for a satellite attitude control system." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6983/.

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Modern control systems are becoming more and more complex and control algorithms more and more sophisticated. Consequently, Fault Detection and Diagnosis (FDD) and Fault Tolerant Control (FTC) have gained central importance over the past decades, due to the increasing requirements of availability, cost efficiency, reliability and operating safety. This thesis deals with the FDD and FTC problems in a spacecraft Attitude Determination and Control System (ADCS). Firstly, the detailed nonlinear models of the spacecraft attitude dynamics and kinematics are described, along with the dynamic models

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12

Choi, Heeju. "Intelligent Control Using Confidence Interval Networks: Applications to Robust Control of Active Magnetic Bearings." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-04062005-113722/.

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Robust control synthesis requires an explicit mathematical description of the system dynamics (a model) and uncertainty bounds associated with that model. These uncertainty bounds are usually chosen arbitrarily and conservatively for guaranteed stability, frequently at the expense of controller performance. This research demonstrates the application of Confidence Interval Networks (CINs), unique artificial neural networks that utilize asymmetric bilinear error cost functions, for estimating the bounds of model uncertainty required for robust control synthesis. A highly nonlinear and unstable a

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13

Jayanth, Vignesh. "Identification and Control of Flexible Structures Supported on Active Magnetic Bearings." NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20010926-183814.

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<p>The focus of this thesis is the development and demonstration of adaptive control algorithms for Active Magnetic Bearings AMBs) that account for uncertainties associated with structural vibration modes. A flexible rotor AMB test rig is designed and modeled using Finite Element Analysis (FEA). The flexible modes and equations of motion are obtained using modal analysis techniques. Typically, such analyses accurately predict the low frequency modes, but accuracy at higher frequencies is greatly reduced. Adaptive control algorithms that account for parametric uncertainties and unmodeled dynami

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14

Wilson, Brian Christopher David. "Control Designs for Low-Loss Active Magnetic Bearing: Theory and Implementation." Diss., Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-04122004-133631/unrestricted/wilson%5Fbrian%5Fc%5F200405%5Fphd.pdf.

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Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2004.<br>Habetler, Thomas, Committee Member ; Sadegh Nader, Committee Member ; Taylor David, Committee Member ; Tsiotras Panagiotis, Committee Co-Chair ; Heck-Ferri Bonnie, Committee Co-Chair. Vita. Includes bibliographical references (leaves 319-326).

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15

Aragón, Ayala Danielo Eduardo. "Optimal control for a prototype of an active magnetic bearing system." Master's thesis, Pontificia Universidad Católica del Perú, 2017. http://tesis.pucp.edu.pe/repositorio/handle/123456789/8675.

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First applications of the electromagnetic suspension principle have been in experimental physics, and suggestions to use this principle for suspending transportation vehicles for high-speed trains go back to 1937. There are various ways of designing magnetic suspensions for a contact free support, the magnetic bearing is just one of them [BCK+09]. Most bearings are used in applications involving rotation. Nowadays, the use of contact bearings solves problems in the consumer products, industrial machinery, or transportation equipment (cars, trucks, bicycles, etc). Bearings allow the tran

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16

Rudd, Brent. "Active Tonal and Broadband Noise Control for Magnetic Resonance Imaging Systems." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1298042881.

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Walker, Alex R. "Fuzzy Attitude Control of a Magnetically Actuated CubeSat." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1384333499.

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18

Herbert, Eric W. "NPSAT1 magnetic attitude control system algorithm verification, validation, and air-bearing tests." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Sep%5FHerbert.pdf.

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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, Sept. 2004.<br>Thesis advisor(s): Barry Leonard, Xiaoping Yun. Includes bibliographical references (p. 185-186). Also available online.

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Tombul, Galip Serdar. "On the application of nonlinear systems theory to active magnetic bearings." Thesis, University of Sheffield, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578704.

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Gibson, Nathan Scott. "H-infinity Control of Active Magnetic Bearings: An Intelligent Uncertainty Modeling Approach." NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-11302004-135840/.

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Robust control techniques require a dynamic model of the plant and bounds on model uncertainty to formulate control laws with guaranteed stability. Although techniques for modeling and identifying dynamic systems are well established, very few procedures exist for estimating uncertainty bounds. In the case of H-infinity control synthesis, a conservative weighting function for model uncertainty is usually chosen to ensure closed-loop stability over the entire operating space. The primary drawback of this conservative, "hard computing" approach is reduced performance due to the number of plants

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21

Marais, Charl Henri. "High speed flexible rotor active magnetic bearing control / by Charl Henri Marais." Thesis, North-West University, 2006. http://hdl.handle.net/10394/1084.

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The School of Electrical, Electronic and Computer Engineering at the North-West University is in the process of establishing a knowledge base on Active Magnetic Bearings (AMBs). In support of this initiative this project is aimed at characterising an in-house developed double radial heteropolar AMB system. Before characterising the AMB system the acoustic noise problem of the system had to be addressed and reduced to an acceptable level. To reduce the acoustic noise of the system a noise analysis was done to determine the source of the noise. The analysis revealed radiated noise from the elect

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22

Lozano, Jauregui John Hugo. "Control for an active magnetic bearing machine with two hybrid electromagnet actuators." Master's thesis, Pontificia Universidad Católica del Perú, 2021. http://hdl.handle.net/20.500.12404/19548.

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This thesis work begins with the revision of state of the art about active magnetic bearings (AMB), the mathematical methods used to obtain geometric and physical parameters that will influence in the mechanical, electrical design and control system proposed by this prototype. The control system will activate the magnetic bearing to center its shaft, for which it is joined a variable load in order to study the best control performance under different load over the rotor proposed by requirements. When the rotor is not controlled in its own axis even though variable load, a position error

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23

Jiménez, Samuel. "Internal sensing and actuation topologies for active rotors." Thesis, University of Bath, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.715252.

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Active control constitutes the state of the art in vibration management in rotating machines. However, existing designs are impractical and costly, and hence not yet widely applied. The goal of the research reported here was to develop a design which would allow the implementation of active technology in a wider range of rotating machine applications. Thus, this study focuses on a novel active rotor topology, consisting of a hollow rotor with internally mounted sensors and actuators. This layout provides greater freedom to select the sensor and actuator positions along the rotor, and naturally

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24

Mendoza, Hector. "Evaluation of the Effectiveness of an Active Magnetic Damper (AMD) in Damping Subsynchronous Vibrations in a Flexible Rotor." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/33887.

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Subsynchronous vibrations such as those caused by rotor instability represent one of the most harrowing scenarios of rotor vibration. They are related to a great diversity of destabilizing forces and some of them are not well understood yet. Therefore, special attention must be paid to this type of vibration. Active Magnetic Bearings (AMBs) monitor the position of the shaft and change the dynamics of the system accordingly to keep the rotor in a desired position, offering the possibility of being used as dampers for vibration control. In the present work, a single-disk and a three-disk rot

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Stott, John Dougal Zebedee. "A comparative study on the control of active magnetic bearings / by J.D.Z. Stott." Thesis, North-West University, 2005. http://hdl.handle.net/10394/959.

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The aim of this project is to perform a comparative study on different control techniques applied to active magnetic bearings (AMBs). The project will involve the evaluation of two suitable nonlinear modem control techniques on an existing model to illustrate their superior performance over conventional linear control techniques. The techniques under investigation are classical PD control, fuzzy logic control and sliding mode control. As a first step the experimental model was characterised and found to be inadequate for a meaningful comparative control study. The physical model was improved i

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Herbst, Dewald. "Single board computer based control of an active magnetic bearing / by Dewald Herbst." Thesis, North-West University, 2008. http://hdl.handle.net/10394/2641.

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The McTronX Research group at the North-West University is currently conducting research in the use of active magnetic bearings (AMBs) for a flywheel energy storage system (FESS). Together with this, the aim of this project is to take the level of control of such AMB systems to an industrial level. Instead of using a rapid prototype dSPACE® controller, a single board computer (SBC) is proposed. Issues to be addressed, includes: SBC overview, control system specifications, skills development for SBC, implementation and evaluation. All the digital and analogue input/output signal requirements f

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27

Mykhaylyshyn, Volodymyr. "Application of Active Magnetic Force Actuator for Control of Flexible Rotor System Vibrations." Cleveland State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=csu1322845232.

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Moorthy, Ananthalakshmy Krishna. "EXTENDED ORBITAL FLIGHT OF A CUBESAT IN THE LOWER THERMOSPHERE WITH ACTIVE ATTITUDE CONTROL." Digital WPI, 2019. https://digitalcommons.wpi.edu/etd-dissertations/558.

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A wide variety of scientifically interesting missions could be enabled by orbital flight altitudes of 150 – 250 km. For the present work, this range of altitudes is defined as extremely Low Earth Orbit (eLEO). The use of low-cost nanosatellites (mass < 10 kg) has reduced the cost barrier to orbital flight over the last decade and the present study investigates the feasibility of using primarily commercial, off-the-shelf (COTS) hardware to build a nanosat specifically to allow extended mission times in eLEO. CubeSats flying in the lower thermosphere have the potential to enable close monitoring

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Zirkle, Todd A. "Analysis of a magnetic three-axis stabilized attitude control system for the NPSAT1 spacecraft." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA397962.

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Thesis (M.S. in Space Systems Operations) Naval Postgraduate School, September 2001.<br>Thesis advisor(s): Spencer, Michael. "September 2001". Includes bibliographical references (p. 91). Also available online.

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Combrinck, Angelique. "Adaptive control of an active magnetic bearing flywheel system using neural networks / Angelique Combrinck." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4457.

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The School of Electrical, Electronic and Computer Engineering at the North-West University in Potchefstroom has established an active magnetic bearing (AMB) research group called McTronX. This group provides extensive knowledge and experience in the theory and application of AMBs. By making use of the expertise contained within McTronX and the rest of the control engineering community, an adaptive controller for an AMB flywheel system is implemented. The adaptive controller is faced with many challenges because AMB systems are multivariable, nonlinear, dynamic and inherently unstable systems.

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Steyn, Stephanus Jacobus Marais. "Multivariable H control for an active magnetic bearing flywheel system / Stephanus Jacobus Marais Steyn." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4939.

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Objectives: The aims of this pilot study were to quantify respiratory and potential dermal exposure of nail technicians to acetone, formaldehyde, ethyl methacrylate, methyl methacrylate, toluene and xylene. Fifteen female nail technicians, working in different salons participated in this study. Products used for nail treatments differed between salons. Most salons used acrylate based nail products whereas others used UV–gel products exclusively. Methods: The participants were divided into two groups, those who used acrylate– and those who used UV–gel products exclusively. Eight hour personal r

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32

Cade, Iain Stuart. "A wavelet based approach to the transient control of rotor/active magnetic bearing systems." Thesis, University of Bath, 2006. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426295.

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Kandil, Mohamed Salah. "Sliding mode control of active magnetic bearings with low losses : a model-free approach." Thèse, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/10166.

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Abstract : Over the past three decades, various fields have witnessed a successful application of active magnetic bearing (AMB) systems. Their favorable features include supporting high-speed rotation, low power consumption, and rotor dynamics control. Although their losses are much lower than roller bearings, these losses could limit the operation in some applications such as flywheel energy storage systems and vacuum applications. Many researchers focused their efforts on boosting magnetic bearings energy efficiency via minimizing currents supplied to electromagnetic coils either by a softwa

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Jones, Evan S. "Development of an active damping system to aid in the attitude control of flexible spacecraft." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/26471.

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Defoy, Benjamin. "Investigation on the control of supercritical centrifugal compressors supported by active magnetic bearings : Toward a new control strategy?" Thesis, Lyon, INSA, 2012. http://www.theses.fr/2012ISAL0140/document.

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Le comportement dynamique des turbomachines industrielles doit respecter des critères émis par les normes internationales et les utilisateurs. Les rotors flexibles sont sensibles à la distribution de balourd, et sont soumis aux excitations aérodynamiques de leur environnement. Usuellement, les contrôleurs utilisés peinent à délivrer le niveau d’exigence demandé, par conséquent les propriétés mécaniques des paliers magnétiques sont fortement dépendantes de celles des rotors. L’objectif de ce mémoire est d’analyser le comportement dynamique des compresseurs centrifuges afin de proposer une strat

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Makovec, Kristin Lynne. "A Nonlinear Magnetic Controller for Three-Axis Stability of Nanosatellites." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/34131.

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The problem of magnetic control for three-axis stability of a spacecraft is examined. Two controllers, a proportional-derivative controller and a constant coefficient linear quadratic regulator, are applied to the system of equations describing the motion of the spacecraft. The stability of each is checked for different spacecraft configurations through simulations, and the results for gravity-gradient stable and non gravity-gradient stable spacecraft are compared. An optimization technique is implemented in an attempt to obtain the best performance from the controller. For every spacecraft co

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Tudor, Zdenko. "Design and Implementation of Attitude Control for 3-axes Magnetic Coil Stabilization of a Spacecraft." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for teknisk kybernetikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-13273.

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Spacecrafts, especially satellites, play an ever greater rolein our daily lives as we increasingly depend on the services they provide,which in turn, more often than not, critically depend on maintainingcorrect payload attitude. As smaller educational satellites pavethe way for organization, group and privately owned pico-satellites, weexplore the possibilities of attitude control through magnetic coil actuation.We approach the whole problem, from control theory developmentto first prototype actualization and control algorithm implementation,presenting the steps taken in a user-friendly manner

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Wolfe, Scott Michael. "Small satellite attitude control for sun-oriented operations utilizing a momentum bias with magnetic actuators." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA297796.

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Thesis (M.S. in Electrical Engineering and M.S. in Engineering Science (Astronautics)) Naval Postgraduate School, March 1995.<br>Thesis advisor(s): Titus, Harold A. ; Alfriend, Kyle T. "March 1995." Includes bibliographical references. Also available online.

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Yan, Hui. "Dynamics and real-time optimal control of satellite attitude and satellite formation systems." Texas A&M University, 2006. http://hdl.handle.net/1969.1/4283.

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In this dissertation the solutions of the dynamics and real-time optimal control of magnetic attitude control and formation flying systems are presented. In magnetic attitude control, magnetic actuators for the time-optimal rest-to-rest maneuver with a pseudospectral algorithm are examined. The time-optimal magnetic control is bang-bang and the optimal slew time is about 232.7 seconds. The start time occurs when the maneuver is symmetric about the maximum field strength. For real-time computations, all the tested samples converge to optimal solutions or feasible solutions. We find the average

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Robinson, John. "Analysis of the orbit lowering and attitude control performance of a magnetic coil-augmented gossamer sail." Honors in the Major Thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/1314.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.<br>Bachelors<br>Engineering and Computer Science<br>Aerospace Engineering

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Wang, Muhao. "H∞ optimal control for linear time invariant and parameter dependent conditions in active magnetic bearing systems." Thesis, University of Bath, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.699000.

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Bangert, Philip Verfasser], and Klaus [Gutachter] [Schilling. "Magnetic Attitude Control of Miniature Satellites and its Extension towards Orbit Control using an Electric Propulsion System / Philip Bangert ; Gutachter: Klaus Schilling." Würzburg : Universität Würzburg, 2019. http://d-nb.info/1181693691/34.

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Pesch, Alexander Hans. "Development of Chatter Attenuation Robust Control for an AMB Machining Spindle." Cleveland State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=csu1401198790.

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Wroblewski, Adam C. "Model Identification, Updating, and Validation of an Active Magnetic Bearing High-Speed Machining Spindle for Precision Machining Operation." Cleveland State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=csu1318379242.

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Sabirin, Chip Rinaldi [Verfasser]. "Digital Control for Active Magnetic Bearings in High-Speed Permanent-Magnet Synchronous Machine with 40000 rpm and 40 kW / Chip Rinaldi Sabirin." Aachen : Shaker, 2014. http://d-nb.info/106619789X/34.

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Kolařík, František. "Řídicí systém aktivního magnetického ložiska." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229668.

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Thesis deals with active magnetic bearing (AMB) levitation control design. Its prototype was done in FSI collaboration with FEKT VUT Brno. The research is focused on communication tools and mathematical model making as well as general AMB issues. Based on this the control design is done an experimentally verified.

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Gonçalves, Junior Romildo [UNESP]. "Controle ativo de vibração de rotores com mancais magnéticos: influência da flexibilidade dos rotores." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/94539.

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Made available in DSpace on 2014-06-11T19:27:14Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-03-03Bitstream added on 2014-06-13T18:31:08Z : No. of bitstreams: 1 goncalvesjr_r_me_ilha.pdf: 1793490 bytes, checksum: 31bd12dfbef20fead2490b33aa2d1148 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Este trabalho apresenta uma análise teórica do desempenho de um sistema de controle ativo de vibração de rotores utilizando mancais magnéticos. O esquema de controle ativo proposto utiliza a estratégia de controle ativo feedforward sobreposta ao sistema de contr

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Kulick, Wayne J. "Development of a Control Moment Gyroscope controlled, three axis satellite simulator, with active balancing for the bifocal relay mirror initiative." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Dec%5FKulick.pdf.

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Martens, Bas. "A fluid loop actuator for active spacecraft attitude control - A Parametric Sizing Model and the Design, Verification, Validation and Test with a Prototype on an Air Bearing." Master's thesis, Faculty of Engineering and the Built Environment, 2019. https://hdl.handle.net/11427/31621.

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Active spacecraft attitude control by using a pumped fluid as the inertial mass has potential advantages over reaction wheels, including high torque, lower power consumption, reduced jitter and prolonged lifetime. Previous work addressed conceptual and mission-specific control aspects, and one fluid loop has flown on a demonstration mission. In this dissertation, a parametric sizing model is developed that can optimize a fluid loop for any mission, based on pump capabilities and customer requirements. The model can be applied to circular, square and helical fluid loops, and includes the power

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Aucamp, Christiaan Daniël. "Model predictive control of a magnetically suspended flywheel energy storage system / Christiaan Daniël Aucamp." Thesis, North-West University, 2012. http://hdl.handle.net/10394/8601.

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The goal of this dissertation is to evaluate the effectiveness of model predictive control (MPC) for a magnetically suspended flywheel energy storage uninterruptible power supply (FlyUPS). The reason this research topic was selected was to determine if an advanced control technique such as MPC could perform better than a classical control approach such as decentralised Proportional-plus-Differential (PD) control. Based on a literature study of the FlyUPS system and the MPC strategies available, two MPC strategies were used to design two possible MPC controllers were designed for the FlyUPS, na

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