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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
151

Desenvolvimento de um modelo simplificado dos membros inferiores de um robô bípede utilizando ROS

Maciel, Eduardo Henrique January 2014 (has links)
Este trabalho apresenta o desenvolvimento de um modelo simplificado dos membros inferiores de um robô bípede, composto basicamente por uma cintura, dois fêmures, duas tíbias e dois pés. A estrutura mecânica do modelo em questão, possui seis graus de liberdade e tem as dimensões aproximadas de um ser humano de estrutura mediana. Seu sistema de controle e de geração de trajetórias é desenvolvido utilizando funcionalidades disponíveis no Robot Operating System (ROS), porém ao contrário da maioria dos controladores existentes no ROS, este projeto propõe implementar um pacote contendo um controlador multivariável (multi-input, multi-output (MIMO)), utilizando a técnica de controle por torque calculado. Para a geração de trajetórias das pernas do robô, implementam-se três tipos diferentes de geração, a interpolação linear, cubica e de quinto grau. Para os testes de validação do sistema de controle e de geração de trajetórias utiliza-se o simulador Gazebo. / This work presents the development of a simplified model of a biped robot’s lower limbs, composed basically by the waist, two femurs, two tibia and two feet. The model’s mechanical structure has six degree of freedom and its dimensions are comparable to a human being’s body. Its control and trajectory generation systems are developed making use of some features available in the Robot Operation System (ROS) tool. However, contrary to most of the controllers offered by ROS, this project suggests the implementation of a new package, including a MIMO (multi-input multi-output) controller, making use of the calculated torque technique. As for the trajectory generation system, three different methodologies are applied of the interpolation: linear, cubic and polynomial quintic. To validate both control and trajectory generation systems, the Gazebo simulator is used.
152

Vliv robotizovaného dojení na chování plemenic skotu / Effect of robotic milking on the behavior of breeding cows

BLÁHOVÁ, Lucie January 2011 (has links)
With increasing consumption of milk and milk products, there were increased number of dairy cattle, but the increase of demand for dairy cows and thus to changes in technology and technique of milking, which would increase milk production, productivity, and improve the welfare of dairy cows. An efficient solution could be milking robots. The first robot was placed on a farm in the Netherlands in 1992. The introduction of robotic milking on agricultural farms in the Czech Republic began in 2003 when the main reason was a shortage of skilled manpower that would be willing to work in harsh working and sanitary conditions. The thesis aim was to assess the effect of milking by the milking robot on the behavior of breeding cows throughout the day in relation to milk yield and fertility in relation to lactation and genotypic classification (H100, HxC, C100). The behavioral monitoring was carried out in dairy farms Brloh (milking by milking robots) and Haklových Dvorech - the control group (in the milking house) in the period from August 2009 to January 2010. The data processing was done with using the Microsoft Excel program. For the evaluation of all parameters were observed in herds calculated basic statistics. Differences disappear individual indicators were evaluated single-factor analysis of variance. The first monitoring of the findings in cattle reproductive performance was the terms of genotype. The values were found favorable for fertility groups HxC in the both stables. Length insemination interval reached 69.1 days in ZD Brloh (compared to 110.1 of the ŠZP Haklovy Dvory), length of service period of 110.8 (vs. 142.9 days). In the meantime, the length (due to differences in the number of animals in the group) was a length of 409.5 versus 438.5 in the group of breeding cows milked in a milking house (ŠZP Haklovy dvory). Further indicators of fertility were evaluated in terms of lactation. The longest length of service period was recorded at 1st lactation in ŠZP Haklovy Dvory were 176 days. The shortest service period was found at the 3rd and subsequent lactations of 133.5 days. Insemination interval, indicating the search of breeding cows, which were in a rutting season, was roughly the same at all lactation ZD Brloh (range 72.7 to 78.2 days) for the ŠZP Haklovy Dvory was the longest period of time to 2 lactation (118.9 days). In terms of breeding cows for milk yield for each lactation cows achieve greater results in the production company with robotic milking (100 days - 3539.1 kg, 200 days - 6727.5 kg of milk 305 days - 9602.9 kg of milk). Compared to the control group, where a 100 days lactation cows milked 3240.06 kg of milk 200 days produced 5433 kg to 305 of milk and 5327.18 kg of milk daily. The behavioral surveillance in both companies was carried out for 24 hours using the interval method with a 10 minutes interval period. The largest part of the day the cows were lying. The second largest dairy operations were the category of standing, which represented the average length of 6.05 hours in ZD Brloh. In the ŠZP Haklovy Dvory was the time period 5.71 hours. The significant period between groups is also the time of feeding, which in the system with the milking in milking house is much shorter by 1.79 hours and it taken 3.71 hours. The length of the movement was in the milking house more than half the size shorter and was 0.32 hours. Also, the length of staying in the milking house was about half shorter and it was 0.22 hours.
153

Desenvolvimento de um modelo simplificado dos membros inferiores de um robô bípede utilizando ROS

Maciel, Eduardo Henrique January 2014 (has links)
Este trabalho apresenta o desenvolvimento de um modelo simplificado dos membros inferiores de um robô bípede, composto basicamente por uma cintura, dois fêmures, duas tíbias e dois pés. A estrutura mecânica do modelo em questão, possui seis graus de liberdade e tem as dimensões aproximadas de um ser humano de estrutura mediana. Seu sistema de controle e de geração de trajetórias é desenvolvido utilizando funcionalidades disponíveis no Robot Operating System (ROS), porém ao contrário da maioria dos controladores existentes no ROS, este projeto propõe implementar um pacote contendo um controlador multivariável (multi-input, multi-output (MIMO)), utilizando a técnica de controle por torque calculado. Para a geração de trajetórias das pernas do robô, implementam-se três tipos diferentes de geração, a interpolação linear, cubica e de quinto grau. Para os testes de validação do sistema de controle e de geração de trajetórias utiliza-se o simulador Gazebo. / This work presents the development of a simplified model of a biped robot’s lower limbs, composed basically by the waist, two femurs, two tibia and two feet. The model’s mechanical structure has six degree of freedom and its dimensions are comparable to a human being’s body. Its control and trajectory generation systems are developed making use of some features available in the Robot Operation System (ROS) tool. However, contrary to most of the controllers offered by ROS, this project suggests the implementation of a new package, including a MIMO (multi-input multi-output) controller, making use of the calculated torque technique. As for the trajectory generation system, three different methodologies are applied of the interpolation: linear, cubic and polynomial quintic. To validate both control and trajectory generation systems, the Gazebo simulator is used.
154

Controle de robô móvel autônomo para coletar lixo. / Control algorithms for an autonomous mobile robot for soda can collection.

Daniel Igor Mendoza Quiñones 24 September 2007 (has links)
Este trabalho apresenta o desenvolvimento dos algoritmos de controle de um robô móvel autônomo para coleta de lixo. O objetivo do robô é coletar latas de refrigerante espalhadas pelo chão. O sistema de navegação do robô foi implementado utilizando a arquitetura denominada \"Motor-Schema\". Essa arquitetura fornece um método para projetar comportamentos primitivos que atuam em forma paralela para realizar ações robóticas inteligentes em resposta aos estímulos do ambiente. O sistema de controle apresentado foi constituído por vários comportamentos primitivos que, coordenados, permitiram ao robô explorar de forma segura um ambiente desconhecido, detectar e coletar o lixo e levá-lo num depósito determinado. Os algoritmos desenvolvidos foram testados utilizando uma ferramenta de simulação 2D denominada Player/Stage. Os resultados obtidos mostraram que a solução apresentada é adequada para resolver a aplicação robótica de coleta de lixo. / This work presents the control system for an autonomous mobile robot for soda can collection. The navigation system is implemented using a reactive architecture called \"Motor-Schema\". This architecture provides a methodology to design primitive behaviors that can act in a distributed and parallel manner to yield intelligent robotic actions in response to environmental stimuli. The control system is composed of several primitive behaviors, which enable the robot explore an unknown environment, detect and collect the soda cans and navigate toward a soda can reservoir. The algorithms are tested using Player/Stage, a software for 2D simulation. The results show that the solution is suitable for soda can collection.
155

Desenvolvimento de um modelo simplificado dos membros inferiores de um robô bípede utilizando ROS

Maciel, Eduardo Henrique January 2014 (has links)
Este trabalho apresenta o desenvolvimento de um modelo simplificado dos membros inferiores de um robô bípede, composto basicamente por uma cintura, dois fêmures, duas tíbias e dois pés. A estrutura mecânica do modelo em questão, possui seis graus de liberdade e tem as dimensões aproximadas de um ser humano de estrutura mediana. Seu sistema de controle e de geração de trajetórias é desenvolvido utilizando funcionalidades disponíveis no Robot Operating System (ROS), porém ao contrário da maioria dos controladores existentes no ROS, este projeto propõe implementar um pacote contendo um controlador multivariável (multi-input, multi-output (MIMO)), utilizando a técnica de controle por torque calculado. Para a geração de trajetórias das pernas do robô, implementam-se três tipos diferentes de geração, a interpolação linear, cubica e de quinto grau. Para os testes de validação do sistema de controle e de geração de trajetórias utiliza-se o simulador Gazebo. / This work presents the development of a simplified model of a biped robot’s lower limbs, composed basically by the waist, two femurs, two tibia and two feet. The model’s mechanical structure has six degree of freedom and its dimensions are comparable to a human being’s body. Its control and trajectory generation systems are developed making use of some features available in the Robot Operation System (ROS) tool. However, contrary to most of the controllers offered by ROS, this project suggests the implementation of a new package, including a MIMO (multi-input multi-output) controller, making use of the calculated torque technique. As for the trajectory generation system, three different methodologies are applied of the interpolation: linear, cubic and polynomial quintic. To validate both control and trajectory generation systems, the Gazebo simulator is used.
156

Towards and Autonomous Mobile Control Unit of Smart Homes

Wang, Haidong January 2013 (has links)
Since smart homes will be more and more popular in the future, the needs of finding a friendly, comfortable and smart interface between users and home environments are growing. However, conventional interfaces have reached their limits. So, this paper describes a new concept of interface in a home environment. This work is distinguished by building a separable smart robot. A smart phone is used as a brain, and a robot car is used as a body. With the system, people will be allowed to carry the robot's brain when they are out of their home. In this case, the brain can not only be a normal smart phone, but also can monitor parameters such as the temperature at home. On the other hand, when people are at home, they will be allowed to put their phones on the robot car. By invoking the system, they will have an assist-robot. This assist-robot will act as a new interface in the smart home by following people and recognizing their voice commands in order to take notes, to read notes and to control smart home devices. This thesis also implements face recognition to improve the communication between users and the interface. Test results show that our proposed system is well accepted.
157

Development of a Multi-Body Autonomous Inspection Robot for Small Diameter Pipes

Garcia Almanza, Cuautli Ignacio 10 September 2020 (has links)
The most common way to transport oil and natural gas in Canada is by using pipes. In the last years, population growth has led to an increase in the pipeline network. This increase will generate new areas of research such as the detection of leakages or cracks and the maintenance of the pipeline system as a whole. In this thesis, a novel hypermobile robot, capable of moving along pipes of different diameters, is proposed and developed. The robot is composed of three modules, two propulsive modules and one control module linked by passive joints. The propulsive module has eight actuators: four gearmotors to propel the robot along the pipe, and four servomotors to control the radial position of the robot in the pipe and to maintain the robot's balance. A Raspberry Pi is used to control the actuators, acquire sensor feedback, and receive commands from a remote wireless user-controlled GUI. An existing dynamic controller is adapted to the robot's architecture. Simulations and experimental tests in open-loop and closed-loop modes are performed to evaluate the effectiveness of the robot's design and controller. The results show the efficiency of the mechanical and electronic components of the robot since it is capable of following the generated paths. The outcome of this thesis can be used in trajectory tracking controllers and for in-pipe robot design.
158

Návrh školního robotu / Proposal of the school robot

Hlaváček, Rudolf January 2017 (has links)
This thesis deals with the design of a low-cost robot used for educational purposes at robotic group Robotárna and at the secondary technical school SPŠ and VOŠ Brno, Sokolská, příspěvková organizace. The main intent of the robot is in teaching students programming. The research part deals with collaborational robots phenomenon and their practical usage in present production plants. The thesis covers the mechanical design of the robot, calculations of the required torques for each joints, design of the robot gripper and also a theoretical solution to robot control.
159

Návrh a realizace konstrukce kolového mobilního robotu / Design of wheeled mobile robot

Ripel, Tomáš January 2010 (has links)
The master's thesis describes the complex design of autonomous mobile robot and its realization. It consists of the design of the chassis, actuators, safety components and electronics. The design part is given by specifications defined by external firm; the specifications are overviewed in the introduction section. The design part describes the function of particular elements the construction nodes consist of. Follow-up chapters solve the implementation of electronics in construction design and also the mounting of the outside shell to the frame. Constructional design of autonomous robot Bender III is the main result of this thesis. All required design and functional specifications were met.
160

Konstrukce univerzálního průmyslového robota / Development of the Versatile Industrial Manipulator

Veteška, Michal January 2016 (has links)
The theoretical part deals with the basic division of industrial robots, their structure and working space. It analyzes propulsion using the industrial robots and sensors required to operate in the robot. The practical part describes the design of a mechanical arm for an industrial robot manipulator. The practical part also includes a description of the sensor and a description of the control unit.

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