Made available in DSpace on 2014-06-11T19:22:31Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-08-31Bitstream added on 2014-06-13T20:09:41Z : No. of bitstreams: 1 kozan_rf_me_ilha.pdf: 1513619 bytes, checksum: 4155bafb25f3608bef16f25ae4874e56 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / A Estimulação Elétrica Funcional (FES - Functional Electrical Stimulation) tem sido utilizada na ajuda do restabelecimento de funções motoras em pacientes hemiplégicos e paraplégicos. A estimulação aplicada em níveis adequados pode ser tão eficaz no fortalecimento muscular quanto uma contração muscular voluntária. Este trabalho faz parte de um projeto multidisciplinar que integra controle e instrumentação que tem por objetivo controlar os movimentos dos membros inferiores de pacientes paraplégicos. Utilizando um processador digital de sinais e um modelo matemático linear simplificado efetuou-se a implementação de um sistema de controle em malha fechada, por meio de um controlador PID, da posição da perna de uma pessoa hígida. Implementou-se também o circuito lógico de um estágio formador de onda de um Estimulador Elétrico Neuromuscular, utilizando LabVIEW. Os parâmetros de estirnulação podem ser alterados com agilidade e facilidade. Resultados experimentais ficaram muito próximos aos obtidos através das simulações. O sistema de controle conseguiu estabilizar a posição da perna de pessoas hígidas no ângulo desejado / The Functional Electrical Stimulation (FES) has been used to help restore motor functions of hemiplegic and paraplegic patients. The FES applied at appropriate levels can be as effective in muscle strengthening as a voluntary muscle contraction. This work is part of a multidisciplinary project that integrates control systems and instrumentation to control the movements of the lower limbs of paraplegic patients. Using a digital signal processor and a simplified linear mathematical model, a PID controller was implemented with the aim of controlling the position of the leg of healthy patients. The Neuromuscular Electrical Stimulator logic circuit was implemented using LabVIEW. The stimulation parameters can be changed easily and quickly. The experimental results were very elose to those simulated. The control system was able to stabilize the position of the leg of a patient at a desired angle

Made available in DSpace on 2014-06-11T19:22:32Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-10-04Bitstream added on 2014-06-13T19:48:53Z : No. of bitstreams: 1 junqueira_mvn_me_ilha.pdf: 2490518 bytes, checksum: 7e14b1f52c086453d1a4b7b8750cb97e (MD5) / Foi desenvolvido um Eletroestimulador Funcional Microcontrolado para geração de movimentos nos membros inferiores de paraplégicos, visando acelerar o processo de reabilitação. O estimulador neuromuscular é constituído por oito canais microcontrolados, com formas de onda de corrente bifásica, retangular e carga balanceada, com capacidade para fornecer correntes com amplitude de até 140 mA, utilizando modulação por largura de pulso (PWM). Foi implementado um controlador Proporcional Integral Derivativo (PID) embarcado para uso com o eletroestimulador, sendo possível determinar a energia a ser aplicada ao membro estimulado, de forma a mantê-lo em uma posição pré-estabelecida. O projeto desse controlador se baseou em um modelo matemático linear de segunda ordem, que representa o comportamento da força muscular devido a um estímulo elétrico. Para validação e teste do funcionamento do sistema, funções matemáticas que descrevem o comportamento fisiológico do membro inferior foram representadas por circuitos eletrônicos. Desta forma, neste projeto foi possível integrar o controlador, o estimulador e o modelo fisiológico do músculo, observando-se a resposta temporal durante a eletroestimulação, descartando, inicialmente, a realização de testes com pessoas, visando preservar a integridade física dos voluntários. Após a verificação do bom funcionamento do equipamento, realizou-se testes com voluntários aplicando o controle em malha fechada / A Microcontrolled Functional Electrical Stimulation (FES) system was developed for generating movements in the lower limbs of paraplegics in order to accelerate their rehabilitation process. The neuromuscular stimulator consists of eight channels, microcontrolled, rectangular, biphasic current waveform, balanced load, with the ability to deliver current with amplitude of 140 mA using pulse width modulation (PWM). A PID controller was implemented for using with the microcontrolled stimulator, and the energy to be applied to the stimulated member can be determined in order to keep the leg in a pre-determined position. The design of this controller was based on a linear second order mathematical model, which describes the behavior of a muscle strength due to an electrical stimulus. For validation and testing the microcontrolled electrical stimulator system, mathematical functions that represent the physiological behavior of the lower limbs were represented by electronic circuits. Thus, this project integrates the controller, the stimulator and the muscle model, observing the time response during electrical stimulation, avoiding testing it with patients and preserving the physical integrity of the volunteers. After verifying the proper operation of the equipment, tests with volunteers were carried out applying closed loop control

Orientador: Aparecido Augusto de Carvalho / Banca: Carlos Antonio Alves / Banca: Uender da Costa Faria / Resumo: Foi desenvolvido um Eletroestimulador Funcional Microcontrolado para geração de movimentos nos membros inferiores de paraplégicos, visando acelerar o processo de reabilitação. O estimulador neuromuscular é constituído por oito canais microcontrolados, com formas de onda de corrente bifásica, retangular e carga balanceada, com capacidade para fornecer correntes com amplitude de até 140 mA, utilizando modulação por largura de pulso (PWM). Foi implementado um controlador Proporcional Integral Derivativo (PID) embarcado para uso com o eletroestimulador, sendo possível determinar a energia a ser aplicada ao membro estimulado, de forma a mantê-lo em uma posição pré-estabelecida. O projeto desse controlador se baseou em um modelo matemático linear de segunda ordem, que representa o comportamento da força muscular devido a um estímulo elétrico. Para validação e teste do funcionamento do sistema, funções matemáticas que descrevem o comportamento fisiológico do membro inferior foram representadas por circuitos eletrônicos. Desta forma, neste projeto foi possível integrar o controlador, o estimulador e o modelo fisiológico do músculo, observando-se a resposta temporal durante a eletroestimulação, descartando, inicialmente, a realização de testes com pessoas, visando preservar a integridade física dos voluntários. Após a verificação do bom funcionamento do equipamento, realizou-se testes com voluntários aplicando o controle em malha fechada / Abstract: A Microcontrolled Functional Electrical Stimulation (FES) system was developed for generating movements in the lower limbs of paraplegics in order to accelerate their rehabilitation process. The neuromuscular stimulator consists of eight channels, microcontrolled, rectangular, biphasic current waveform, balanced load, with the ability to deliver current with amplitude of 140 mA using pulse width modulation (PWM). A PID controller was implemented for using with the microcontrolled stimulator, and the energy to be applied to the stimulated member can be determined in order to keep the leg in a pre-determined position. The design of this controller was based on a linear second order mathematical model, which describes the behavior of a muscle strength due to an electrical stimulus. For validation and testing the microcontrolled electrical stimulator system, mathematical functions that represent the physiological behavior of the lower limbs were represented by electronic circuits. Thus, this project integrates the controller, the stimulator and the muscle model, observing the time response during electrical stimulation, avoiding testing it with patients and preserving the physical integrity of the volunteers. After verifying the proper operation of the equipment, tests with volunteers were carried out applying closed loop control / Mestre

Orientador: Aparecido Augusto de Carvalho / Banca: Erica Regina Marani Daruichi Machado / Banca: Ruberlei Gaino / Resumo: A Estimulação Elétrica Funcional (FES - Functional Electrical Stimulation) tem sido utilizada na ajuda do restabelecimento de funções motoras em pacientes hemiplégicos e paraplégicos. A estimulação aplicada em níveis adequados pode ser tão eficaz no fortalecimento muscular quanto uma contração muscular voluntária. Este trabalho faz parte de um projeto multidisciplinar que integra controle e instrumentação que tem por objetivo controlar os movimentos dos membros inferiores de pacientes paraplégicos. Utilizando um processador digital de sinais e um modelo matemático linear simplificado efetuou-se a implementação de um sistema de controle em malha fechada, por meio de um controlador PID, da posição da perna de uma pessoa hígida. Implementou-se também o circuito lógico de um estágio formador de onda de um Estimulador Elétrico Neuromuscular, utilizando LabVIEW. Os parâmetros de estirnulação podem ser alterados com agilidade e facilidade. Resultados experimentais ficaram muito próximos aos obtidos através das simulações. O sistema de controle conseguiu estabilizar a posição da perna de pessoas hígidas no ângulo desejado / Abstract: The Functional Electrical Stimulation (FES) has been used to help restore motor functions of hemiplegic and paraplegic patients. The FES applied at appropriate levels can be as effective in muscle strengthening as a voluntary muscle contraction. This work is part of a multidisciplinary project that integrates control systems and instrumentation to control the movements of the lower limbs of paraplegic patients. Using a digital signal processor and a simplified linear mathematical model, a PID controller was implemented with the aim of controlling the position of the leg of healthy patients. The Neuromuscular Electrical Stimulator logic circuit was implemented using LabVIEW. The stimulation parameters can be changed easily and quickly. The experimental results were very elose to those simulated. The control system was able to stabilize the position of the leg of a patient at a desired angle / Mestre

No description available.

This master’s thesis deals with conveyor belt control design. Control system is created in LabVIEW environment. Application uses machine vision for monitoring objects on the conveyor belt. In the first part there is theoretical background. In the next parts there are described design, implementation and verification of created control system.

This thesis analyzes the design and performance of a photovoltaic (PV) emulator. With increasing interest in renewable energies, large amounts of money and effort are being put into research and development for photovoltaic systems. The larger interest in PV systems has increased demand for appropriate equipment with which to test PV systems. A photovoltaic emulator is a power supply with similar current and voltage characteristics as a PV panel. This work uses an existing power supply which is manipulated via Labview to emulate a photovoltaic panel. The emulator calculates a current-voltage (I-V) curve based on the user specified parameters of panel model, irradiance and temperature. When a load change occurs, the power supply changes its current and voltage to track the calculated I-V curve, so as to mimic a solar panel. Over 250 different solar panels at varying irradiances and temperatures are able to be accurately emulated. A PV emulator provides a controlled environment that is not affected by external factors such as temperature and weather. This allows repeatable conditions on which to test PV equipment, such as inverters, and provides a controlled environment to test an overall PV system.

In 2014, Toyon Research Corporation donated a 6’x6’x8’ anechoic chamber to the Cal Poly EE department to advance student education in the areas of antennas and wireless communications. An anechoic chamber is a room designed to suppress electromagnetic radiation reflections so that accurate measurement of radio frequency (RF) systems such as wireless radios and antennas can take place. Despite the fact that Cal Poly already has a larger anechoic chamber, primarily used for antenna characterization, it is the purpose of this project to design, code, and equip the new chamber so that it performs at least as good, or better than, the existing chamber. Radiation pattern is a key characteristic that describes the directionality or gain of an antenna, and it is important for quantifying and qualifying how an antenna will perform as part of a wireless communication system. Radiation pattern measurement can be time consuming because it requires measuring an antenna’s transmission or reception in in all directions. In both the old and new antenna measurement systems (AMS), a vector network analyzer (VNA) measures signals transmitted between the antenna under test (AUT) and an RF field probe within the antireflective environment of the anechoic chamber. The new system synchronizes VNA measurement with the rotation of the AUT using the automation software LabVIEW and a Sunol Sciences FS-121 antenna positioner. Then, Matlab plots the data collected by LabVIEW as well as calculates useful antenna metrics including half power beam width (HPBW) and directivity. LabVIEW also makes the AMS easy to operate because of its graphical user interface. The new anechoic chamber completes measurements faster than Cal Poly’s existing chamber, with good accuracy and ease of use. The new chamber works best with smaller antennas at frequencies up to 6 GHz and beyond. Radiation patterns have good SNR, and match with simulations and measurements done in the larger chamber. However, due to its smaller size the new AMS is not a replacement for the existing larger system when testing antennas larger than 1 m or at frequencies below 2 GHz.

My master thesis is focused on design and realization fully automated system which will be used for the characterization of the organic FET structure, based on DPP derivatives with follow optimization of the characterization process. Program „MeasFET“ has been created at the LabVIEW surroundings that drives hardware gadgets was build-up during last year. Furthermore, initial tests were taken for optimalization process of charge carrier mobility measurements in derivatives DPP.

This thesis deals with certain properties of real time operating systems (RTOS) Ardence PharLap ETS, WindRiver VxWorks and LabVIEW RT module. Three methodologies of RTOS quality comparison are proposed, two of which are practically tested with described experiments on CompactRIO hardware from NI. Furthermore, there is explained need for RTOS usage and experimental comparison of jitter error influence on total harmonic distortion THD defined by two definitions.