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Modelling and control of wheeled mobile robots
Sypták, Michal ; Šembera, Jaroslav (referee) ; Šolc, František (advisor)
Control of wheeled chassis does not constitute a problem in the area of mobile robotic solely. Rather, it can be encountered in transportation, both at close range and long range. In this thesis, mobile chassis are characterized as kinematic models. These models prove to be erroneous at high speed, whereas they sufficiently accurately represent the real robotic system in situations when slow, autonomous motion of the robot is desired. In comparison with dynamic models, both their project and implementation are simpler, too. The first part of this thesis is focused on a basic description of the motion of a robot in-plane. In the next part, five, most frequently used wheels in robotics are described and characterized - standard fixed wheels, standard steering wheels, castor wheels, multidirectional wheels and omnidirectional wheels. The motion conditions are deduced from each type of wheel. There are two methods of projecting the mobile robot model – full modelling and generic modelling. Based on these two methods, six models of mobile robots with different motion properties are proposed and described. The last and most extensive part of this thesis deals with simulator of robot motion created in Matlab/Simulink. It includes users guide which allows the configuration of random chassis and various trajectories of motion. In this way, it is possible to visually evaluace and classify the the different types of robots. The core of this thesis is largely connected with the field of odometry – i.e. transformation output from speed sensor and turning of wheels sensor into the robot position in the system of coordinates that defines its working space. Simulator as complex only model motion of mobile robots in plain. Its inside structure included algoritms, that have been used in praxis for control real mobile robots. In this way created Simulator models the motion of mobile robots in-plain only. However, its inside structure is based on algorithms, that could be used for control of real mobile robots in real-life working.
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Control of mobile robot
Vožda, Ondřej ; Skula, David (referee) ; Šembera, Jaroslav (advisor)
This thesis describes questions of developing the system for remote and presence control of a mobile robot (wheelchair). It is concerned with choice of a proper protocol for communications via wireless network, transmission of images from webcam and data from joystick. Next objective of the thesis is recognizing surrounding obstacles using ultrasonic range finders. Thesis describes observation arisen from using this type of sensors. One of the most important points of the thesis is to discuss the safety of usage of the developed system. In conclusion, possibilities for future development are stated.
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Minidarpa robot - sensors
Sedlák, Luboš ; Šembera, Jaroslav (referee) ; Kopečný, Lukáš (advisor)
Bachelor's thesis be concerned with sensoric system of mobile robot Minidarpa. It means sonar which locate space ahead robot, camera for navigation, electronic compass to compute the direction of the Earth magnetic field and accelerometer which designates tilt, speed and position.
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Omnidirectional chassis control
Hrazdira, Adam ; Burian, František (referee) ; Šembera, Jaroslav (advisor)
The aim of this work is to design and implement software for omnidirectional chassis control. The document takes into account a real model of the chassis. Furthermore, the text presents the principles of the chassis and the client program for control. In the end the possibility of communication and control with Matlab Simulink environment is discussed.
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RFID control
Otava, Lukáš ; Skula, David (referee) ; Šembera, Jaroslav (advisor)
This thesis is about RFID technology about its features and available solutions for long distance identification reading. In the next part there is complete practical design of RFID access control of car park. This solution correspond with requests of safety and security. Output of this system control is control signals for entrance gate. This device uses Atmel AVR microcontroller. As RFID reader is used hybrid module with external antenna. Application for microcontroller is written in C programming language.
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Modelling and control of wheeled mobile robots
Jonszta, David ; Šembera, Jaroslav (referee) ; Šolc, František (advisor)
The thesis deals with modelling and control of wheeled mobile robots. The thesis introduces the mathematical models of diferentially driven mobile robot, robot with Ackerman steering and a skid steered robot. The thesis describes open-loop and feedback control. Feedback control is divided into point-to-point control, path following and trajectory tracking.
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Altitude control of flying robot
Palacký, Tomáš ; Šembera, Jaroslav (referee) ; Baránek, Radek (advisor)
This bachelor’s thesis deals firstly with design and construction of a device for testing of altitude control algorithms of a flying robot. Secondly with creating and testing of an altitude control algorithm in order to apply findings while creating a copter control system. Provided is a selection and analysis of used hardware and software components – microcontroller AVR ATmega, ultrasonic sensor, motor controller and also communication interfaces IC, USART and SPI. Also design and realization of electrical wiring, circuit board and mechanical structure is being described here. The next section includes creation of software for microcontroller and PC application. The altitude control algorithm is developed using a simulation, furthermore tested and tuned for desired behavior.
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Wheelchair
Kutnar, Pavel ; Burian, František (referee) ; Šembera, Jaroslav (advisor)
Thesis describes the design, development and testing of new control unit of the wheelchair. Odometry, complete control of the wheelchair and a simple communication protocol provides to superior sytem an opportunity of autonomous control. The document contains a description of the wheelchair modifications, odometry theory including its application and a description of the unit itself. The basis of the electronic part is an ATmega16 microcontroller. Tests reveal problems of odometry and suggest possible improvements.
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Robotic devices for disabled
Dojava, Marian ; Burian, František (referee) ; Šembera, Jaroslav (advisor)
The goal of this bachelor thesis is a improvement of a wheelchair. It is need to facilitate placing a wheelchair into a car of person with disability. The solvent of this problem is especially realizing of a remote control. This thesis deals with implementation communication between the selected components and it deals with implementation the integral system, too.
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