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1
Robertson, Edwin M. "Features of the neural coding of actions." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244630.
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Elias, Leonardo Abdala. "Modelagem e simulação do sistema neuromuscular responsável pelo controle do torque gerado na articulação do tornozelo." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/3/3142/tde-02102013-150228/.
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O estudo do controle neurofisiológico do movimento tem sido realizado sob várias perspectivas. Experimentos com seres humanos são realizados durante a execução de uma dada tarefa motora e, frequentemente, mediante a aplicação de estímulos externos (elétrico, magnético ou mecânico) ao sistema neuromuscular. Estes experimentos fornecem uma grande quantidade de dados referentes ao funcionamento das redes neuronais e dos atuadores biomecânicos envolvidos nos procedimentos. Entretanto, alguns achados experimentais permanecem incompreensíveis, requerendo a utilização de outros recursos para elucidar quais mecanismos estão por trás dos resultados. Neste sentido, a modelagem matemática e a simulação computacional servem como parte importante destas ferramentas que são imprescindíveis para uma melhor compreensão dos mecanismos neurofisiológicos e biomecânicos por trás do controle do movimento. A presente tese de doutorado teve como objetivo prover um modelo neuromusculoesquelético biologicamente plausível capaz de investigar diferentes mecanismos responsáveis pelo controle do torque gerado na articulação do tornozelo. Este modelo teve como base um modelo neuromuscular previamente proposto, porém, que não incorporava uma série de elementos fundamentais para um estudo mais amplo do sistema motor. O novo modelo proposto contempla modelos de motoneurônios com dendritos ativos, proprioceptores musculares responsáveis pelas vias reflexas de curta e média latência, modelos que representam as características viscoelásticas dos músculos e um modelo biomecânico do ser humano durante a postura ereta quieta. O modelo foi aplicado a diferentes problemas relacionados ao funcionamento do sistema neuromusculoesquelético, que são tipicamente explorados por experimentos com seres humanos, e forneceu bases teóricas importantes para estes achados.The neurophysiological control of movement has been studied from several standpoints. Human experiments are performed during the execution of a given motor task and, frequently, by applying an external stimulation (electrical, magnetic, or mechanical) to the neuromuscular system. These experiments provide a large amount of data concerning the functioning of the neuronal networks and biomechanical actuators involved in the procedures. Nonetheless, some experimental findings remain puzzling, so that other available resources should be used to clarify what mechanisms are behind these results. In this vein, the mathematical modeling and computer simulations are invaluable tools that may be used to better understand the neurophysiological and biomechanical mechanisms underlying the motor control. The present PhD thesis aimed at providing a biologically plausible neuromusculoskeletal model that was used to study different mechanisms involved in the control of the ankle joint torque. This model was based on a previous neuromuscular model, which did not employ several elements that are fundamental to a comprehensive evaluation of the motor system. The novel proposed model encompasses motor neuron models with active dendrites, muscle proprioceptors responsible for the short- and medium-latency reflex pathways, muscle models with the main viscoelastic features, and a biomechanical model of the human body during upright stance. It was applied to a series of problems frequently related to the functioning of the neuromusculoskeletal system and its main outcomes provided important theoretical bases for a set of experimental findings.
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Gezelius, Henrik. "Studies of Spinal Motor Control Networks in Genetically Modified Mouse Models." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-109889.
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Carlsen, Anthony Nigel. "Motor preparation and the auditory startle response." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/384.
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Studies investigating human information processing have provided evidence that in some cases, movements can be prepared in advance. Although evidence for motor preparation has been shown at cortical and spinal levels, motor preparation at a subcortical level is not well described. One line of inquiry has involved the use of a startling acoustic stimulus (115-124 dB) that can act as an early trigger for pre-programmed actions in reaction time (RT) tasks. In light of this new research paradigm, the startle reflex may be used as a tool to investigate motor preparation. Here, six experiments were conducted that work towards the goals of understanding the mechanism of RT shortening due to startle, and motor preparation at a subcortical level.
The first section (2 experiments) of this dissertation provides evidence that when a motor action can be prepared in advance, it is pre-programmed and stored subcortically awaiting the normal cortical “go” signal. A startle appears to activate structures directly that are involved with the voluntary response channel leading to early triggering of the pre-programmed response, and dramatically reduced RT. In the current dissertation we investigated alternative mechanisms to explain startle RT facilitation, including the stimulus intensity effect, and a fast transcortical route, with results supporting the original subcortical storage hypothesis.
The second section (4 experiments) presents data which together provide insight into motor programming processes, and the circumstances under which a response is pre-programmed. For example, when the possibility of not having to make the response existed, a known response was not pre-programmed. Similarly, no pre-programming occurred when certainty existed regarding when to respond. However, while a previous experiment showed that having to make a choice between several response alternatives precluded pre-programming, this dissertation shows that if possible response alternatives are not in conflict with one another, multiple responses can be prepared in parallel. Finally, the complexity of a response such as one involving multiple sequenced sub-components may limit the ability to pre-program in a simple RT task. Taken together, these results suggest that pre-programming is dependent on the task characteristics and appears to involve implementation of strategies to increase programming efficiency.
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Brown, Jennifer. "Feedback motor control and the basal ganglia." Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648678.
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Montgomery, Alistair Scott. "Excitability of somatic afferent pathways to the motor cortex during locomotion in the cat." Thesis, University of Bristol, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385915.
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Issa, Fadi Aziz. "Effect of Social Status on the Behavior and Neurophysiology of Crayfish." Digital Archive @ GSU, 2008. http://digitalarchive.gsu.edu/biology_diss/35.
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Adaptation to changing social conditions is important for many social animals. Here, the effects of social experience on the behavior and neurophysiology of the red swamp crayfish, Procambarus clarkii, were studied. Evidence is presented that shows juvenile crayfish interact and form social order, and their behavior patterns shift in accordance to social status. Dominant animals maintain a high level of aggressive behavior, while subordinates shift their behavior pattern from aggressive to submissive behavior. Adult male crayfish show similar behavior pattern during dominance formation. However, this work demonstrates that male crayfish adopt a unique strategy to signify the formation of a social order expressed in the form of pseudocopulation. Pseudocopulation between male crayfish signifies the acceptance of the social status and leads to the reduction of aggression of dominants and enhances the survival of subordinate animals. I investigated the long-term effects of social status on the behavioral and physiological responses of crayfish to unexpected sensory touch. I discovered that animals of different social experience display different orienting responses that correlate with in vivo electromyographic recordings from the legs’ depressor muscle. The status-dependent response patterns observed in vivo are retained in a reduced, in vitro, preparation that lacks descending input from the brain. The role of serotonin (5-HT) was investigated in mediating the motor output patterns of the depressor nerve. Putative serotonergic innervations of the depressor nerve were identified that originate from serotonergic neurons located in the first abdominal ganglion. Selective stimulation of the ipsilateral 5-HT neuron enhances the response of the depressor nerve to sensory stimulation. Application of 5-HT modestly increased the tonic firing activity of the depressor nerve in social isolates and subordinates but significantly decreased the activity in dominants. This work illustrates that the formation of a dominance relationship significantly and immediately alters the behavior of the participants. As the social relationship matures, the social experience that develops affects the underlying neurophysiology that mediates the behavior. It will be of great interest in future studies to identify not only the effects rather the mechanisms of how social experience induces physiological changes.
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Uygur, Serdar. "An Fpga Based Bldc Motor Control System." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614104/index.pdf.
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In this thesis, position and current control systems for a brushless DC (Direct Current) motor
are designed and integrated into one FPGA (Field Programmable Gate Array) chip. Experimental
results are obtained by driving the brushless DC motors of Control Actuation System
of a guided missile. Because of their high performance, brushless DC motors are widely used
in Control Actuation Systems of guided missiles. In order to control the motor torque, current
controller is designed and implemented in the FPGA. Position controller is designed to
fulfill the position commands. A soft processor in the FPGA is used to connect and configure
the current controller, position sensor interfaces and communication modules such as UART
(Universal Asynchronous Receiver Transmitter) and Spacewire. In additionposition controller is implemented in the soft processor in the FPGA. An FPGA based electronic board is designed and manufactured to implement control algorithms, power converter circuitry and to perform other tasks such as communication with PC (Personal Computer). In order to monitor the behavior of the controllers in real time and to achieve performance tests, a graphical user interface is provided.
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Turl, Gary. "A synchronised multi-motor control system using hybrid sensorless induction motor drives." Thesis, University of Nottingham, 2002. http://eprints.nottingham.ac.uk/29510/.
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The main aim of this project was to research, develop and test an induction motor drive not requiring a speed encoder, but which could be considered commercially viable by motor drives manufacturers, and which should aim to meet the follow requirements: • Dynamic torque performance and steady state speed-holding accuracy to be comparable with encodered vector controlled drives • Extensive and highly accurate knowledge of electrical and mechanical parameters of the motor and load not to be required • Extensive commissioning from an expert engineer not to be necessary • Algorithm not to rely on excessive computational capability being available The drive was to operate, in a stable manner, over speed and load ranges at least comparable with commercially available sensorless induction motor drives. The above requirements were set such that the developed sensorless technique may be considered for synchronised multi-motor process applications, where the advantages of a sensorless system could be exploited for hazardous, damp and hot conditions. The solution developed consists of a leading model-based sensorless method augmented with a speed estimator that tracks harmonics, seen in the stator terminal quantities, due to rotor slotting. The model-based scheme facilitates field-orientated control for dynamic performance. The slot harmonic speed estimator tunes the model for speed accuracy. Slot harmonics are identified using a recursive signal processing method termed the Recursive Maximum Likelihood - Adaptive Tracking Filter. This work is the first example of the method being developed into a practical sensorless drive system and the complete speed identifier is described, including set-up, pre-filtering and the minimal parameter considerations. Being recursive the method is computationally efficient, yet has accuracy comparable with that of FFT identifiers used in other work. The developed sensorless strategy was implemented practically on two motor drive systems. The performance of the scheme is shown to give encoder like speed holding accuracy and field-orientated dynamic performance. The two drives were also configured and tested as a speed synchronised pair, using applicable multi-motor control techniques, themselves compared and contrasted. The sensorless performance is demonstrated, alongside an encodered version acting as a benchmark, and the performance of the two schemes is shown to be highly comparable. The author has found no other example of sensorless techniques considered for use in multi-motor applications. The use of such a technique brings established advantages associated with encoder removal and allows multi-axis electronic synchronisation to be considered for parts of a process where an encoder may not be appropriate.
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Cabib, Christopher. "Alteraciones de la excitabilidad refleja y del control motor en esclerosis múltiple." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/401656.
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INTRODUCCIÓN: En Esclerosis Múltiple (EM) el sustrato neuropatológico típicamente muestra un patrón de distribución aleatoria de lesiones desmielinizantes, con particular predilección por estructuras comisurales y subcorticales tales como el cuerpo calloso y el tronco del encéfalo. En estos pacientes, es común observar fenómenos subclínicos pocos explorados, tales como la hiperactividad facial, la lentitud motora y la falta de control motor, que pueden estar relacionados al daño encefálico multifocal que ocurre en vías neurales y circuitos específicos por alteración en los mecanismos de conducción y excitabilidad.
HIPÓTESIS: Los pacientes con EM presentan signos neurofisiológicos subclínicos indicativos de alteraciones en la excitabilidad de los circuitos reflejos tronco-encefálicos y del control motor en la ejecución de tareas unimanuales. Estas alteraciones se correlacionan con lesiones cerebrales subcorticales, especialmente comisurales.
MÉTODOS: Veintiún pacientes con EM en estadio leve de enfermedad fueron sometidos a 2 diseños experimentales. Primero, la excitabilidad del reflejo de parpadeo fue evaluada en ambos lados del rostro mediante el estudio del tamaño de las respuestas obtenidas por diversas técnicas electrofisiológicas (estimulación única trigeminal y somatosensorial, estimulación pareada y condicionada con prepulso somato-sensorial), y correlacionada con el patrón de distribución hemisférica de lesiones desmielinizantes. Segundo, en un paradigma de tiempo de reacción “cruzado” (extensión de la muñeca ante un estímulo somato-sensorial aplicado en la mano contralateral como señal imperativa) que involucra necesariamente la transferencia inter-hemisférica de impulsos, se estudió la asociación entre el retraso del tiempo de reacción con: el tiempo de tránsito transcalloso (medido por estimulación magnética transcraneal), la excitabilidad de estructuras subcorticales involucradas en la preparación del acto motor (mediante el estudio del efecto StartReact), y la presencia de actividad involuntaria electromiográfica “en espejo”. Tales anormalidades fueron comparadas con los datos obtenidos en sujetos sanos, y correlacionadas con medidas de daño estructural y microestructural por resonancia magnética nuclear en cuerpo calloso y tronco del encéfalo.
RESULTADOS: 1. En un subgrupo de pacientes en un estadio más precoz de enfermedad (35%) se observó una asimetría en la “excitabilidad” del reflejo de parpadeo que se asoció a una distribución asimétrica de lesiones hemisféricas, a diferencia de lo observado en pacientes en un estadio más avanzado (40%) que mostraron un retraso en la “conducción” de las respuestas del reflejo de parpadeo y una distribución hemisférica simétrica de lesiones. 2. En pacientes, se observó que la lentitud de reacción motora se asocia a una reducción en el efecto StartReact, y que el retraso del tiempo de reacción en tareas “cruzadas” se correlaciona con una prolongación en el tiempo de tránsito transcalloso. 3. En tareas motoras “cruzadas”, los pacientes mostraron una actividad “en espejo” exagerada que se asocia a un mayor daño microestructural de fibras callosas y a atrofia del tronco del encéfalo.
CONCLUSIONES: En pacientes con EM es frecuente encontrar alteraciones subclínicas de la excitabilidad en los circuitos reflejos y estructuras subcorticales y a falta de control motor, revelados mediante estudios neurofisiológicos. Tales alteraciones se explican mayormente por el daño multifocal encefálico con afectación predominante de los hemisferios cerebrales, cuerpo calloso y tronco del encéfalo.INTRODUCTION: Multifocal distribution of demyelinating lesions in the brain affecting mainly the brainstem and the corpus callosum (CC) are common findings in magnetic resonance (MRI) of patients with multiple sclerosis (MS). These patients may present with subclinical signs (myokymia, bradykinesia or lack of motor control) representing altered excitability in specific neural circuits. HYPOTHESIS: Signs of altered excitability in MS show in the study of brainstem reflex circuits or during the hand movement execution in reaction time paradigms requiring transcallosal pathways (“crossed” motor tasks). These abnormalities combine with distant lesions in cerebral hemispheres or with focal lesions in brainstem and CC. METHODS: We studied 21 mildly-disabled MS patients and 11 healthy volunteers in two experimental conditions. First, the blink reflex excitability was examined in both sides to single stimulation of trigeminal and median nerves, and to paired trigeminal stimulation and conditioned with a somato-sensory prepulse. These measures were associated with the distribution of hemispheric demyelinating MRI-lesions. Second, in the context of a “crossed” reaction time paradigm, participants were requested to perform unilateral wrist-extension movements to a sensory stimulus applied in the contralateral hand used as imperative signal. “Crossed” reaction time was correlated to transcallosal conduction time measured with transcranial-magnetic-stimulation, and associated to the startling- acceleration in the reaction time (a.k.a. StartReact effect) and with the presence of mirror electromyographic activity (mEMG). Abnormalities were correlated with MRI- measures of structural/ultrastructural damage in brainstem and CC. RESULTS: In 35% of patients we found an asymmetric blink reflex excitability in absence of brainstem lesions which associated with an asymmetric distribution of hemispheric lesions, whereas in 40% of patients we found delayed blink responses which associated with brainstem lesions and symmetric distribution of hemispheric lesions. In patients, slowness of reaction associated with reduced StartReact effect, and delayed “crossed” reaction time correlated with lengthening in transcallosal conduction time. In "crossed” reaction time, patients showed enhanced mEMG which associated with increased ultrastructural callosal damage and brainstem atrophy. CONCLUSIONS: MS patients show altered excitability in brainstem reflex circuits and subcortical structures and lack of motor control. These abnormalities are related to lesion involvement of cerebral hemispheres, CC and brainstem.
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Siewert, Marcus. "Development of a control system for DC-motor." Thesis, Mälardalen University, School of Innovation, Design and Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-9576.
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A control system for a BLDC (Brushless Direct Current) motor has been developed in Labview 2009. This report explains how it works, conclusions and some information about things that could have been done differently. This report is also a good introduction to Labview including its advantages and disadvantages. It also explains how a FOC (Field Oriented Control) works.
This is the public version of the report which does not include any results or information about the implementation. This information can be found in the original report which only authorized persons have access to.
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Wang, Zhihuo. "Robust fault tolerant control of induction motor system." Thesis, University of Hull, 2018. http://hydra.hull.ac.uk/resources/hull:16576.
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Research into fault tolerant control (FTC, a set of techniques that are developed to increase plant availability and reduce the risk of safety hazards) for induction motors is motivated by practical concerns including the need for enhanced reliability, improved maintenance operations and reduced cost. Its aim is to prevent that simple faults develop into serious failure. Although, the subject of induction motor control is well known, the main topics in the literature are concerned with scalar and vector control and structural stability. However, induction machines experience various fault scenarios and to meet the above requirements FTC strategies based on existing or more advanced control methods become desirable. Some earlier studies on FTC have addressed particular problems of 3-phase sensor current/voltage FTC, torque FTC, etc. However, the development of these methods lacks a more general understanding of the overall problem of FTC for an induction motor based on a true fault classification of possible fault types. In order to develop a more general approach to FTC for induction motors, i.e. not just designing specific control approaches for individual induction motor fault scenarios, this thesis has carried out a systematic research on induction motor systems considering the various faults that can typically be present, having either “additive” fault or “multiplicative” effects on the system dynamics, according to whether the faults are sensor or actuator (additive fault) types or component or motor faults (multiplicative fault) types. To achieve the required objectives, an active approach to FTC is used, making use of fault estimation (FE, an approach that determine the magnitude of a fault signal online) and fault compensation. This approach of FTC/FE considers an integration of the electrical and mechanical dynamics, initially using adaptive and/or sliding mode observers, Linear Parameter Varying (LPV, in which nonlinear systems are locally decomposed into several linear systems scheduled by varying parameters) and then using back-stepping control combined with observer/estimation methods for handling certain forms of nonlinearity. In conclusion, the thesis proposed an integrated research of induction motor FTC/FE with the consideration of different types of faults and different types of uncertainties, and validated the approaches through simulations and experiments.
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Spejcher, Clint. "A comprehensive fleet risk control system for Bill's Distributing." Online version, 1998. http://www.uwstout.edu/lib/thesis/1998/1998spejcherc.pdf.
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Baston, Chiara <1986>. "Motor control system in Parkinson’s disease: a modeling approach." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/7147/.
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Parkinson’s disease is a neurodegenerative disorder due to the death of the dopaminergic neurons of the substantia nigra of the basal ganglia.
The process that leads to these neural alterations is still unknown.
Parkinson’s disease affects most of all the motor sphere, with a wide array of impairment such as bradykinesia, akinesia, tremor, postural instability and singular phenomena such as freezing of gait.
Moreover, in the last few years the fact that the degeneration in the basal ganglia circuitry induces not only motor but also cognitive alterations, not necessarily implicating dementia, and that dopamine loss induces also further implications due to dopamine-driven synaptic plasticity got more attention.
At the present moment, no neuroprotective treatment is available, and even if dopamine-replacement therapies as well as electrical deep brain stimulation are able to improve the life conditions of the patients, they often present side effects on the long term, and cannot recover the neural loss, which instead continues to advance.
In the present thesis both motor and cognitive aspects of Parkinson’s disease and basal ganglia circuitry were investigated, at first focusing on Parkinson’s disease sensory and balance issues by means of a new instrumented method based on inertial sensor to provide further information about postural control and postural strategies used to attain balance, then applying this newly developed approach to assess balance control in mild and severe patients, both ON and OFF levodopa replacement. Given the inability of levodopa to recover balance issues and the new physiological findings than underline the importance in Parkinson’s disease of non-dopaminergic neurotransmitters, it was therefore developed an original computational model focusing on acetylcholine, the most promising neurotransmitter according to physiology, and its role in synaptic plasticity.
The rationale of this thesis is that a multidisciplinary approach could gain insight into Parkinson’s disease features still unresolved.
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PATEL, TARPIT KAUSHIKBHAI. "MOTION-CONTROL SYSTEM OF BENCH-TOP CT SCANNER." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1229708881.
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Knight, Matthew John. "Precision control of a sensorless brushless direct current motor system." Thesis, University of Plymouth, 2002. http://hdl.handle.net/10026.1/2565.
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Sensorless control strategies were first suggested well over a decade ago with the aim of reducing the size, weight and unit cost of electrically actuated servo systems. The resulting algorithms have been successfully applied to the induction and synchronous motor families in applications where control of armature speeds above approximately one hundred revolutions per minute is desired. However, sensorless position control remains problematic. This thesis provides an in depth investigation into sensorless motor control strategies for high precision motion control applications. Specifically, methods of achieving control of position and very low speed thresholds are investigated. The developed grey box identification techniques are shown to perform better than their traditional white or black box counterparts. Further, fuzzy model based sliding mode control is implemented and results demonstrate its improved robustness to certain classes of disturbance. Attempts to reject uncertainty within the developed models using the sliding mode are discussed. Novel controllers, which enhance the performance of the sliding mode are presented. Finally, algorithms that achieve control without a primary feedback sensor are successfully demonstrated. Sensorless position control is achieved with resolutions equivalent to those of existing stepper motor technology. The successful control of armature speeds below sixty revolutions per minute is achieved and problems typically associated with motor starting are circumvented.
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Ulrich, Peyton. "Design of a Three-Phase Brushless DC Motor Control System." DigitalCommons@CalPoly, 2021. https://digitalcommons.calpoly.edu/theses/2291.
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In the past several decades, the Brushless DC (BLDC) motor has seen increased usage due to several distinct advantages over its brushed counterpart, including higher performance, increased reliability, and minimal maintenance requirements. However, the electronic commutation system of the BLDC motor creates the need for an accompanying electronic motor control system of increased complexity, adding to the overall cost of the BLDC motor and motor control system. As such, continued research and exploration in the area of BLDC motor control is necessary to continue to reduce the cost of BLDC motors and their corresponding motor control systems. This project focuses on the design of a motor control system for a Three-Phase Brushless DC Motor.
A printed circuit board was designed for use in Three-Phase BLDC motor control and the design process was documented within this report. Due to an international IC shortage at the time of this project, fabrication was unable to be completed, however fabrication plans and cost estimation is included herein. Preliminary software modifications were tested to the extent possible with an off-the-shelf evaluation board, and future software modifications were outlined. Description of the hardware design and software development of this system is included in this report, as well as analysis of this system for future design, fabrication, and testing.
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Sumon, Md Yiasin. "An Analysis and Improvement of Brushless DC Motor Control System." Thesis, North Dakota State University, 2013. https://hdl.handle.net/10365/26887.
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Trapezoidal Back-EMF (Brushless DC) motors are gaining increasing importance in
automotive industries, HVAC applications, home appliances etc. Traditionally, Brushless DC
motors are commutated electronically using position sensors. In these systems, mechanical or
electromagnetic sensors are used. In sensorless control, rotor back EMF detection is the most
popular technique for speed and position control. Detection of back EMF by novel speed
independent commutation function is a very well researched topic that has overcome most of the
problems of traditional back EMF detection scheme. In this thesis, a thorough study and speed control scheme for Brushless DC motors using
position sensor is presented along with simulation and experimental results. An improved
sensorless scheme based on speed independent commutation and state observer based back EMF
sensing is analyzed. Both methods use hysteresis control for the current loop and a PI controller
for the speed loop to reduce steady state speed error.
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Byadarhaly, Kiran. "A Neuro-dynamical model of Synergistic Motor Control." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1384426521.
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Hagio, Shota. "Muscle synergy for coordinating redundant motor system." Kyoto University, 2016. http://hdl.handle.net/2433/215620.
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Kyoto University (京都大学)0048
新制・課程博士
博士(人間・環境学)
甲第19794号
人博第765号
新制||人||184(附属図書館)
27||人博||765(吉田南総合図書館)
32830
京都大学大学院人間・環境学研究科共生人間学専攻
(主査)教授 神﨑 素樹, 教授 森谷 敏夫, 教授 石原 昭彦
学位規則第4条第1項該当
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Sprague, Milo D. "A High Performance DSP Based System Architecture for Motor Drive Control." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-81197-165134/.
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Spencer, Robert Michael. "Rhythmic motor system control by projection neuron activity pattern and rate." Miami University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1461269867.
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Rapp, Tobias. "A COP optimized control system for a CO₂ based automotive A/C-system." Thesis, Nelson Mandela Metropolitan University, 2007. http://hdl.handle.net/10948/773.
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In the last few years carbon dioxide received increasing attention as a possible replacement for fluorocarbon-based refrigerants used within present automotive A/C system technology. R-134a is harmless to the ozone layer but the greenhouse effect is more than 1300 times higher than that of an equivalent amount of CO2. Alternative refrigerants are natural gasses such as propane and butane, however these gasses are considered explosive. With many objections raised it appears if CO2 will be the future refrigrant for automotive use. One concern with R-744 is its high operating pressure and suction/discharge pressure difference when compared to common refrigeration processes. A major problem with the CO2 cycle is the loss of effciency at high ambient temperatures. With a COP optimized control system for the expansion value based on pressure, temperature and mass flow of the refrigerant, an effective A/C system for CO2 could be deleloped. This resrach offers basic knowledge of refrigerant cycles and gives an overall view of the refrigerant change-over problem. With the results obtained from the experimental work a better understanding of the CO2 cycle and a better understanding towards effective A/C systems have been realized.
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Jung, Jackson H. (Jackson Hoa-Wai). "Modeling, and classical and advanced control of a solid rocket motor thrust vector control system." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/12473.
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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993.Includes bibliographical references (leaves 119-124).
by Jackson H. Jung.
M.S.
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Elgayar, Ibrahim. "Mathematical modelling, flight control system design and air flow control investigation for low speed UAVs." Thesis, City University London, 2013. http://openaccess.city.ac.uk/2737/.
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The demand for unmanned aerial vehicles (UAVs) has increased dramatically in the last decade from reconnaissance missions to attack roles. As their missions become more complex, advances in endurance and manoeuvrability become crucial. Due to the advances in material fabrication, wing morphing can be seen as an ideal solution for UAVs to provide improvements by overcoming the weight drawback. This thesis investigates the area of aircraft design and simulation for low speed UAVs looking at performance enhancements techniques for low speed UAVs, and their effects on the aerodynamic capabilities of the wing. The focus is on both suitable control design and wing morphing techniques based on current research findings. The low speed UAV X-RAE1 is used as the test bed for this investigation and is initially analytically presented as three dimensional body where the equations relate to the forces and moments acting on the UAV. A linearised model for straight flight at different velocities is implemented and validated against a non-linear model. Simulations showed the X-RAE1 to have acceptable stability properties over the design operating range. Control design techniques, linear quadratic regulators (LQR) and H-infinity optimisation with Loop Shaping Design Procedure (LSDP), are used to design simple control schemes for linearised longitudinal model of the X-RAE1 UAV at different velocities. The effectiveness and limitations of the two design methods show that both designs are very fast, with settling times 2-3 seconds in the height response and remarkably low variation of the results at different velocities. Computational fluid dynamics is then used to investigate and simulate the impact of introducing smart effector arrays on a UAV. The smart effector array produces a form of active flow control by providing localised flow field changes. These induced changes have direct impact on the aerodynamic forces and showed a substantial increase of lift at low angles of attack. There was also a significant increase to the lift to drag ratio at high angles of attack which resulted to a delay in stall.
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Treacy, Peter John. "Pyloric motor function in the control of gastric emptying /." Title page, contents and abstract only, 1991. http://web4.library.adelaide.edu.au/theses/09MD/09mdt784.pdf.
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Schenck, Wolfram. "Adaptive internal models for motor control and visual prediction." Berlin Logos-Verl, 2008. http://d-nb.info/989979113/04.
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Lin, I.-Chi, and 林毅琪. "Automation Motor Control System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/89359919203520042046.
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碩士淡江大學
電機工程學系碩士在職專班
96
Besides receiving input signal, the control system can receive feed-back signal and parameter setting signal, It can make system stably and precise to rotate with motor. Moreover, the parameter setting can adjust system coefficient that tuned and control motor output condition. And the parameter setting doesn’t need to adjust coefficient by external circuit. It just only inputs the parameter setting. In this paper, the Gain Tuning 1 and the Gain tuning 2 have the ability to tune motor setting when Parameter Setting inputs set into the Gain Tuning 1 and the Gain tuning 2. The main function of Gain Tuning 1 can boost or reduce input signal when input signal going through decode circuit. Therefore, they accomplish amplify or shrink input signal gain.Input signal and motor feedback signal both go through comparator to produce a contrast value. The Gain Tuning 2 tune signal is similar with the function of the Gain Tuning 1. The control system also used another input control signal and it will control more motors in one time by a frame signal.
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Huang, Yao-Ching, and 黃耀慶. "Distributed Motor Control System." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/52796739552019087131.
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chou, wei-kai, and 邱威凱. "Distribution synchronous Motor Control System." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/72793036871972360036.
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碩士國立中央大學
機械工程研究所
91
We want to develop a distribution synchronous motor control system.We design two electric board - Digital Inout Board、Differental and TTL Translation Board.They can help motion control module send signal to motor driver.In the FPGA , we add two new module - pulse generator、synchronous module.They can help dsp sending signal to motor driver and help dsp doing synchronism.
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weng, wei-han, and 翁偉涵. "Intelligent Control of Motor Drive System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/86442923162868952692.
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碩士國立高雄應用科技大學
電機工程系
98
This paper presents a dynamic modeling and intelligent control method for two different type actuators, the permanent magnet synchronous motor (PMSM) and the traveling wave ultrasonic motor (TWUSM). In the dynamic modeling and drive system of permanent magnet synchronous motor, the precise mathematical model has been derived by using a field-oriented control method and combination of sinusoidal pulse width modulation (SPWM) strategies, which are easily to construct the whole simulation system in the Matlab Simulink. For the dynamic modeling and drive system of traveling wave ultrasonic motor two-dimensional analytical method with LLCC resonant driving circuit are adopted. In control aspect, this paper proposed a self-constructing and simplification recurrent fuzzy neural network for the speed control of two different motors to trace periodic reference trajectories. The proposed learning algorithm consists of structure learning and parameter learning. The structure learning determines neurons (fuzzy rules) generation, while the parameter learning algorithm used the supervised gradient decent method to adjust the connected weights in the consequent part. When the system is stable, fuzzy decision-making method is used to delete unimportant fuzzy rules automatically, so as to achieve a simplest structure of SCRFNN. Even confront with different system, the proposed method may create a suitable fuzzy rule base according to the characteristics of each system, and show a good control performance. Finally, this article use Simulink to simulation the part of dynamic modeling, drive system and control of two kinds motors. After comparing simulation results with the drive system base on GA-Fuzzy control system, it can be verified the proposed control method in face of two completely different drives systems, still have good speed and high precision tracking response. When the system is subjected to load and parameter changes, it also exists good robustness.
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Wu, Cheng-Ying, and 吳城印. "Position Control of Servo Motor and Remote Control System." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/p93t3y.
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碩士國立虎尾科技大學
光電與材料科技研究所
99
This thesis proposes a servo motor positioning control and remote monitoring system. The Programmable Logic Controller (PLC) and Human Machine Interface (HMI) are key controllers in equipment side. This system can be entered and stored the route of position coordinate of servo motor in advance. This system also can control many sets of system via the network system by the central control computer in the same time. And it can collect relevant data to set up a database via the central control computer. Generally speaking the remote monitoring system and database system both are very huge. And their setup cost is also very high. This thesis has already set up a simple structure, low cost and easy expandable system.
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Hsu, An-Kir, and 許安克. "PC-Based Linear Motor Driver Control System." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/92491196917725001187.
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碩士崑山科技大學
電子工程研究所
100
This paper will introduce a PC-Based linear motor drive control system, because this control system has an open, scalable and low price, so the use of various industries in recent years more and more widely. This system use a set of industrial computer as the control and configure the input and output on the computer, digital/analog conversion, and movement and visual devices such as adapters to receive the return of the state by an external feedback signal, to operations ,and output signal control of linear motors to guides the machine moves. The control system can be equipped with a microscope boxes, laser, charge coupled device (CCD) camera can be taken as function to detect and repair. It can be widely used in nanoscale semiconductor and thin film transistor liquid crystal display (TFT- LCD) test equipment.
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Hsu, Chia-Wei, and 許家瑋. "Application of Intelligent Motor Control System for Control and Protection of Three-Phase Induction Motor." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/56521156678651408559.
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碩士國立臺灣海洋大學
電機工程學系
100
Motor control center (MCC) is widely used in the industry. The conventional MCC consists of electrical and mechanical components and apparatus and all connections are in the form of hard wiring. The task of troubleshooting often needs to make measurements with a large number of components and control points, which is labor-intensive with high maintenance cost and time. In recent years, the Intelligent Motor Control Systems (IMCCs) are gaining development and applications. The IMCCs use new intelligent components and network technology and will be able to identify the type of motor fault more quickly. In this thesis, the functions of IMCC motor protection is applied to the diagnosis of motor faults with the detection of imbalances in voltage and current. The conditions under study are carbon deposits on the electromagnetic contactor and open line circuit faults of an induction motor. An experimental platform for the diagnosis of motor faults includes an IMCC, an induction motor, a personal computer equipped with Matlab/Simulink and LabVIEW, a magnetic contactor, and resistors with numerous values resistance. Some function codes, including motor fault simulation, virtual instrumentation, and fault diagnosis, are implemented in the personal computer. Experiment works consist of both the software simulation and hardware emulation of motor faults and practical detections. It is found that the IMCC will assist the maintenance crew in diagnosing the motor faults.
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Liu, Wei-Kuo, and 劉偉國. "Nonlinear Control for Linear Induction Motor Drive System." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/74455839173408915402.
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碩士元智大學
電機工程研究所
89
Abstract The purpose of this thesis is to develop a sliding-mode feedback linearization control (SMFLC) system and an adaptive optimal control(AOC) system for the high-precision position control of a linear induction motor (LIM). First, the driving cricuit of the LIM is developed and the nonlinear decoupled control technique is adopted to decouple the thrust force and the flux amplitude of the LIM. Then, a SMFLC system, which is comprised of a sliding-mode flux and a sliding-mode position controllers, is designed in order to increase the robustness of LIM drive system. Moreover, to relax the requirement of the secondary flux in the SMFLC system, an adaptive flux observer is proposed to estimate the secondary flux. The control laws of the SMFLC system are derived in the sense of Lyapunov stability theorem such that the asymptotically stability of the control system can be guaranteed even under the possible occurrence of uncertainties. In addition, an AOC system is designed to increase the system control performance. In the AOC system, an adaptive uncertainty observer is used to estimate the bound of uncertainties for confronting the shortcoming in the traditional optimal control system. The control laws of the AOC system also are derived in the sense of Lyapunov stability theorem, so that system-tracking stability can be guaranteed. Finally, the effectiveness of the proposed control schemes is verified by both numerical simulation and experimental results.
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Alvis, Sudath Priyashanthe. "Electrohydraulic stroke control system for a hydaulic motor." 1994. http://catalog.hathitrust.org/api/volumes/oclc/32770718.html.
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Thesis (M.S.)--University of Wisconsin--Madison, 1994.Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 100-101).
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Wong, Wei-Jyun, and 翁瑋竣. "Predictive Control of Switched Reluctance Motor Drive System." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/06047117119407840628.
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碩士國立聯合大學
電機工程學系碩士班
103
The objective of this thesis is to develop of the switched reluctance motor drive system and to use of the Texas Instruments produced TMS320F28335 digital signal processor control system including a set of general-purpose input and output ports, 16 channels of analog to digital converters (ADC), 12 channels of enhanced pulse width modulator (ePWM).The TI TMS320F28335 DSP control board can be not only set in accordance with the relevant user registers, automatically generate a PWM signal with a smooth drive and control the motor, but also simplified a large number of hardware circuits designs. First, the mathematical model of a switched reluctance motor is created, and then the use of a digital signal processor as the basis of a switched reluctance motor drive system is implemented. An incremental PI controller, a fuzzy controller, a fuzzy self-tuning proportional-integral controller, and a predictive controller, and a fuzzy self-tuning control gain predictive controller are proposed and implemented. Finally, a comparison and analysis of the advantages and disadvantages between these five controllers is presented.
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Li, Chun-Te, and 李俊德. "The Motor Control System for Electric Motorcycles With Remote Control Interface." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/40111499250891078097.
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碩士國立交通大學
電機與控制工程系
89
The key technologies of an electric motorcycle are battery, motor, and controller. Due to the low energy density of the battery, current electric motorcycles have limited cruising range. Therefore, an efficient motor controller and energy management are very important. In this thesis, we investigate the phase-advance motor control strategy and energy-reuse techniques to enhance the efficiency. Further, the study also uses a serial port to monitor motor speed, current status, and send system commands to the controller. Java is used to build the interface which is capable of low-level communication as well as network applications. As a result, we could transmit information to remote host via serial port, local host, and Internet.
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Huang, Hsin-Wei, and 黃信瑋. "Design of Fuzzy Control System for Induction Motor Direct Torque Control." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/9gzj45.
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碩士國立臺北科技大學
電機工程系所
100
The fuzzy control theory is used to design torque controller and flux controller these are applied to direct torque control (DTC) of induction motor. In the conventional DTC scheme, two PI controllers are used to generate the reference stator voltage vector. Then the parameters of PI controllers are stationary, therefore it can’t respond the dynamic performance. In order to improve the disadvantages of conventional DTC, this design of two fuzzy controllers (FC); Fuzzy torque controller (FTC) and fuzzy flux controller (FFC) are designed to substitute the original PI controllers, which improves the flux response and reduce the torque ripple for better system dynamic performance. The thesis also adopts cerebellar model articulation controller (CMAC) and fuzzy control theory with Gaussian as membership functions to design the adaptive fuzzy cerebellar model articulation controller (AFCMAC) speed controller. The mentioned AFCMAC has the advantages of simple structure and rapid learning ability. In addition, for the dynamic performance of motor is affected by stator resistance due to temperature effect, this research combines model reference adaptive system (MRAS) with fuzzy control theory to make the stator resistance fuzzy stator resistance estimator (FSRE) for real-time estimating and acquiring accurate flux linkage. Finally, this scheme integrated FTC, FFC, AFCMAC speed controller and FSRE to achieve the sensorless speed control for DTC of induction motor. Via the simuliaton and experimental results, the proposed direct torque control systems have excellent speed response and robustness within 36 rpm to 2000 rpm and 8 Nm load torque.
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Hsieh, Chin-Chiang, and 謝致強. "Design of 2-axies servo motor gantry control system." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/08714629044355923171.
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碩士國立高雄應用科技大學
電機工程系博碩士班
96
The Application of servo motor is becoming more and more popular in industry at present. The servo motor is used in all motion with precision and speed. In Taiwan, the industry of LCD grows vigorously and panel size make heavy in recent years. So a lot of mechanism must erect by gantry. The control of gantry of 2-axies servo motor becomes quite important. The control system of servo motor for machine is mainly PLC and PC-Based. Because the personal computer system it is very cheap and quite ripe, the author adopted PC-Based to develop the gantry control system of servo motor. The windows operating system of Microsoft is general type and has some restrictions for real-time control of industry. The 3rd Party Real-Time Extension of MS-Windows XP is used to solve this problem generally. The 3rd Party Real-Time Extension is subsystem for XP to handle Hard Real-Time procedure. The RTX 7.0 is used to promote the function of Hard Real-Time in MS-WINDOWS XP and enhance the ability of real-time of PC. The servo motion card of PC-Based is sold with various types on the market and the popular type is not match the function of gantry control. The author combined the PS400 servo motion card of ICPDAS Inc. and Hard Real-Time function with self-developed device driver in order to meet the function of gantry control. The efforts reached the demand with the minimum hardware cost. The function of gantry control system includes automatic home search synchronously of dual axis, motion stop synchronously of dual axis, forward jog synchronously of dual axis, reverse jog synchronously of dual axis and relative motion synchronously of dual axis. The author constructed the mechanism of gantry system with the above control methods to operation in practice. Some illustrative examples demonstrate that satisfactory performance is achieved.
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Chen, Ming-Liang, and 陳銘良. "The Sensorless Direct Torque Control System for Induction Motor." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/24995805262217816522.
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碩士國立高雄應用科技大學
電機工程系碩士班
94
In this thesis, we researched the sensor-less direct torque control system applied to an induction motor servo system, using the induction motor stationary d-q axis model to deduce the rotor speed. Because the sensor-less direct torque control system needed accurate motor parameters, we proposed an automatic parameter measuring technique. To analyze and verify the control rules, We used the Matlab/Simulink to design the sensor-less direct torque control system. In addition to the above, we realized the hardware configuration by the xPC-MC240 PCI I/O Card development servo controller, made by TeraSoft corporation. We described the connections among the xPC soft/hardware, MC240 PCI I/O Card and the inverter in detail. By the simulation and the experiment, we demonstrated the feasibility of the proposed sensor-less direct torque control.
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Wu, Jia-Wen, and 吳家汶. "Variable Structure Control of the Motor-Flexible Mechanism System." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/06022320029763563594.
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碩士中原大學
機械工程學系
88
This paper applies the variable structure control (VSC) and the stabilizer design by using pole placement technique to position control of the flexible slider-crank mechanism under impact. The VSC strategy associated with its best advantages of robustness with respect to parameter variations and external disturbances is employed to regulate the slider position. In order to suppress the flexible vibrations simultaneously, the stabilizer design is involved. For the practical impact consideration, three approaches including the generalized momentum balance, the continuous force model, and the continuous force model associated with the effective mass compensation are adopted and derived based on the energy and impulse-momentum conservations. Simulation results are provided to demonstrate the performance of the motor-controller-flexible mechanism not only accomplishes good tracking trajectory of the slider position, but also eliminate the vibrations of the flexible connecting rod.
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Hsue, Hung-Wen, and 許鴻文. "System Identification and Position Control of Linear Servo Motor." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/17518884649958399596.
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碩士元智大學
機械工程研究所
88
In recent years, permanent magnet linear synchronous motors (PMLSM) are widely used in servo motor control system. It drives objects simpler than traditional method that using rotation convert to direction, and the thrust generated by PMLSM directly applies at the driven object, we can obtain more efficient power transmission. Nowadays, PMLSM has been applied in servo control of high technique productions. Several papers had present the mathematical model of PMLSM with three phase voltage (current) input, but less research discussed in two phase voltage (current) input. Therefore, this thesis provides a mathematical model of PMLSM, which is driven by using phase voltage equation and energy conservation on general assumption. We estimate the model unknown parameters by using nonlinear curve fitting, and linearize the model to equivalent transfer function form. Finally, we use the RST controller based on the polynomial pole-placement method to achieve the position control and disturbance rejection of PMLSM by experiments.
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WU, PANG-JUNG, and 吳邦榮. "The Disk Structure Brushless D C Motor Control System." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/veun37.
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碩士逢甲大學
電機工程學系
106
Based on the frame of permanent magnet brushless motor, this paper designs a driver suitable for disk type permanent magnet brushless DC motor, the driver chip adopts ATmega2560 of megaAVR series developed by manufacture Microchip Technology / Atmel. In order to measure the time sequence state of motor, Hall sensing element is used to detect the sequence of phase conversion of three-phase disc type permanent magnet brushless DC motor, and through the Pulse Width Modulation(PWM) of which to control the rotation speed. In order for stable driver operation, this paper adds optical coupling elements between the driving circuit and control circuit. By means of component characteristics to achieve driver electrically isolated to prolong its service life, and the gate driver element with built-in dead zone time is also used so as for the upper and lower arms of the power transistor in the driver are not simultaneously switched on at the moment of motor phase conversion for fear of the damage of the power transistor. At last, adding feedback PID control rule under the establishment of motor phase Conversion control database (proportional-integral-differential controller) to adjust the average voltage output to make the speed control more accurate under different load conditions.
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Lu, Yi-Zhong, and 呂溢中. "Sliding Mode Control of Linear Motor Precision Serve System." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/4eeyuy.
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碩士國立臺北科技大學
自動化科技研究所
94
The need for high speed and high precision motion control in the machine tool industry and in the manufacture of semiconductors is rapidly growing. In order to achieve the high precision requirement, friction effects have to be considered in the motion system. Friction will lead to tracking errors, limit cycles and undesired stick-slip motion. In this paper, a nonlinear state observer using variable structure systems theory is firstly proposed to estimate the velocity of linear motor. According to this estimated velocity, parameters of LuGre friction model and friction force are estimated based on closed velocity loop. When compared with the conventional open loop parameter estimation, this closed loop scheme is robust and remarkably reduces the effect of measurement noise. Then, a sliding mode controller with friction compensator is proposed to control the linear motor. It is effective to friction compensation and robust to parametric uncertainties. Finally, the proposed controller is evaluated and compared experimentally on a microcomputer, which is ported a multitasking real-time kernel, controlled linear motor positioning system. The simulated and experimented results show that the velocity error is drastically improved by the sliding mode controller with friction compensator in a linear motor system.
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Lin, Ming-Tzan, and 林明贊. "Vector Control for a Synchronous Reluctance Motor Drive System." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/99629826906896732112.
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碩士國立臺灣科技大學
電機工程研究所
82
This thesis proposes a DSP based, fully digital control synchronous-motor-drive system. A new control algorithm is developed to improve the chattering of the motor speed, which is produced by sliding mode controller. In addition, the new algorithm can provide a fast response and robust servo system. First, the construction, characteristics, and modeling of the motor are studied. Then, the vector control strategies with their torque characteristics are explained. Next, a fuzzy- sliding mode controller is derived. The slope of the sliding line is on-line adjusted by the fuzzy controller. The proposed method in the thesis can not only obtain a better performance than sliding mode controller, but also achieve a better load disturbance than the traditional PI controller.This paper uses only a DSP to execute current-loop control, speed-loop control, and d-q to a-b-c axis transformation. Moreover, the switching frequency can achieve as high as 20 KHz. The experimental results show that the proposed system can achieve a wide speed range, a good transient response and a good steady-state characteristics. Experimental results and computer simulation validate theoretical analysis. This thesis provides a new direction to design a synchronous reluctance motor drive system.
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Wey, Ming-Yann, and 魏銘彥. "Control System Analysis and Design of Linear Stepping Motor." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/bh42qs.
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碩士國立虎尾科技大學
電機工程研究所
95
The purpose of this dissertation is to develop systematic analysis and design approach for linear stepping motor. Based on the system model, two control strategies, adaptive backstepping control and output feedback stepping control, are proposed and validated by computer simulation. The driving system is then constructed by using a digital signal processor TMS320C32 as the controller and integrating PWM driving circuits. Compared with generic current control strategy, the proposed method introduces a voltage control scheme which is based on the backstepping control idea. First, a compact system model is derived by coordinate transformation. With this model, an adaptive backstepping control approach is developed based on Lyapunov stability analysis. Then, extending the design principle, an observer-based backstepping control method, known as a sensorless control, is explored for linear stepping motor. As verified by computer simulation, the proposed method can perform well both in precision control and robustness to control uncertainties such as frictions, parameter variations, and external disturbances. In addition, hardware circuits are designed to realize voltage control scheme. With this test-bed, a prototype of the firmware developed for the driving system of linear stepping motor has been established.
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Tsao, Po-Yu, and 曹博昱. "Brushless DC Motor System Identification and Sensorless Control Analysis." Thesis, 2019. http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22107NCHU5441031%22.&searchmode=basic.
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碩士國立中興大學
電機工程學系所
107
Brushless DC motors (BLDC) are widely used in the daily lives. It has the advantages of high efficiency, high torque, quick response, high speed, and low noise. System identification is also an important topic in the electric motor area. It can provide more information for the user to get the state space equation and the response curve. In this thesis, we use the least square approximation method to obtain the unkown system parameters of the equivalent linear motor dynamics. For sensorless controller design, we first use a state observer with armature voltage and current as inputs to obtain the rotor speed. We then use a 120-degree six-step square wave to control the insulated gate bipolar transistor (IGBT), instead of using an incremental encoder to obtain the rotor data for the speed sensing. Finally, we select the variable structure control to achieve constant speed control.
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Chen, Chih-Tai, and 陳志泰. "High reliability motor drive control system on FPGA-Based." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/36344166922795960637.
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碩士國立雲林科技大學
電機工程系
104
This paper focuses on the use of FPGA to establish a complete operating environment of a motor and a control program written (man-machine interface, motor control program) and the current, speed, angle, position feedback related peripheral. Sometimes limited resources must be completed within the limits of the size of the same functions, assembly language programs written may comprise fewer resources, and some special places and high-level language processors can no corresponding support, for example, in the space environment the control-related hardware operations. The overall system architecture communicate using serial communications transmission (SCI), including downloading the app, orders, return the system parameters, etc. ......, the memory will exchange information with the Hamming code (hamming code), serial transmission cyclic redundancy added test (CRC) and other debugging debugging mechanism, making the entire system can be under external factors interfere with the complex environment than the rest of the controller can be more stable operation. Keyword：Point to Point,Interpolation,Stepping Motor Micro Step Control,MicroStepping Motor Servo Control,Cycle Redundancy Check,Error Detection and Correction
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Lai, Hong-Yu, and 賴弘育. "Balancing Control for Sliding Seesaw System by Motor Driving." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/88786177776012186370.
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碩士健行科技大學
機械工程系碩士班
102
The pneumatic cart-seesaw system is developed by the Sensor and Control Laboratory of Chien Hsin University of Science and Technology for several years. However, the compressibility of air and highly nonlinear flow through pneumatic components, often damage the functioning of the system. Hence, this thesis proposes a new laboratory apparatus which is driven by the servo motors and gear transmission. Comparing to the previous pneumatic cart-seesaw system, the major difference is using servo motor and gear transmission to instead the rodless pneumatic cylinder. In addition, the dynamic equation is derived by Lagrange formulation and also analyzed in this research. The core control system is using Digital Signal Processing (DSP) to combine with LabVIEW graphical human-machine interface to implement PID and fuzzy controller. Experimental results indicate that utilizing the proposed novel cart-seesaw system play a superior performance than the existed pneumatic type in balancing and tracking control. Consequently, the development of such platform can be profitable for academic laboratory in developing various control algorithms, especially in nonlinear control verification.