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Design and Implementation of Algorithms for Compensating the Effect of Linear Acceleration on Angular Velocity Measurements by MEMS Gyroscopes
Spáčil, Tomáš ; Luczak, Sergiusz (referee) ; Hnidka, Jakub (referee) ; Grepl, Robert (advisor)
Tato Disertační práce se zabývá vývojem nového typu dopředného kompenzátoru, speciálně určeného k potlačení vlivu lineárního zrychlení a ryvu působícího na MEMS gyroskopické senzory. Z principu funkce inerciálního snímače, dochází při umístění gyroskopického senzoru mimo osu rotace k vzniku dalších nežádoucích sil (normálové a tečné), které negativně ovlivňují měření žádané úhlové rychlosti. Přítomnost těchto sil je však možno měřit nezávislým senzorem, akcelerometrem, a vhodným způsobem kompenzovat výstupní hodnotu gyroskopického senzoru a tím zpřesnit nepřímo měřenou hodnotu úhlové rychlosti. V první části práce identifikujeme vliv zmíněných zrychlení na MEMS gyroskopy, v drůhé části práce pak navrhneme a otestujeme různé kompenzátory, vyhodnotíme jejich efektivitu a v třetí části vhodný algoritmus implementujeme na RT HW.
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Design of the absolute position sensors with Hall elements
Pikula, Jiří ; Andrš, Ondřej (referee) ; Houška, Pavel (advisor)
This work deals with possibilities of use of linear Hall sensors which are made as integrated circuit for construction of absolute sensors of position and rotary position. Hall sensors with permanent magnets allow a smaller construction. In this work there is described a design and solution of absolute linear sensor of position for linear drive of Stewart's platform and absolute sensors of rotary position for robotic manipulator Mini-swing. Use of these sensors adds many advantages, primary minimal size and high resolution.
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Engineering Mechanics 2023
Radolf, Vojtěch ; Zolotarev, Igor
The proceedings contains papers presented at the 29th International Conference on Engineering Mechanics, which has been held in OREA Resort Devět Skal in Czech Republic under auspices of the Czech Society of Mechanics and being a part of IFTOMM (The International Federation for the Promotion of Mechanism and Machine Science) activities. As it corresponds with character of the conference, this proceedings consists of several topic oriented parts: Biomechanics, Fluid mechanics, Dynamics, Fracture mechanics, Mechatronics, Reliability of structures, Mechanics of solids, Technological processes, Thermodynamics. The volume represents a well-balanced overview of theoretical, numerical and experimental work on fundamental and applied studies.
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Virtual commissioning of the production system
Zaťko, Tomáš ; Bražina, Jakub (referee) ; Štěpánek, Vojtěch (advisor)
This thesis contains a research overview of the current market situation, both in terms of different 3D printer designs and the production systems used for mass production of plastic products, a general discussion of virtual commissioning including available software enabling virtual commissioning. The thesis offers several conceptual designs with their evaluation together with the elaboration of the selected design. The virtual commissioning project includes the creation of a CAD model, together with a mechatronic part, including the creation of the linkages and the real model. Another part of the project is the development of a PLC program to control the virtual model.
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COMPUTER SIMULATION STUDY OF THE STABILITY OF UNDERACTUATED BIPEDAL ROBOT MODELS (motivated by Griffin and Grizzle, 2017)
Polach, P. ; Anderle, Milan ; Zezula, Pavel ; Papáček, Štěpán
A key feature for bipedal walkers (robots and humans as well) is their stability or disturbance rejection defined as the ability to deal with unexpected disturbances. The paper by Griffin and Grizzle (2017) have significantly contributed to the shift from flat ground to slopes and steps when evaluating the walking efficiency of their robots. Similarly, in this contribution, based on the appropriate model of robot dynamics and control law, we examine the stability of walking-without-falling for different ground perturbations for a threelink compass gait walker. I.e., we perform the sensitivity analysis of the walking stability of underactuated bipedal walker with respect to certain disturbation using the alaska/MultibodyDynamics simulation tool.
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Modelling, Optimization and Control Design for Strongly Nonlinear Systems with Discrete Sensors
Bastl, Michal ; Štefek, Alexandr (referee) ; Opluštil, Vladimír (referee) ; Grepl, Robert (advisor)
The main motivation for this effort was international cooperation on modeling and control design for the stabilization system of the naval satcom antenna. The dissertation focuses on the design of models based on ODE and DAE from the perspective of mechatronic design. It mainly discusses the possibilities for simulation with a fixed step solvers, what is a necessary condition for real-time simulation and other use of modern approaches such as RCP and HIL. Furthermore, the work deals with modeling of friction, which is due to the strongly non-linear properties problematic for numerical models. The last output is the simulation comparison and verification of the possibility of implementing the incremental encoder into the Kalman filter algorithm.
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Measuring station with data transmission via LoRa network
Nguyen, David ; Formánek, Martin (referee) ; Najman, Jan (advisor)
This thesis deals with the data transmission from the measuring station via LoRa network. The goal is to research possible solutions of data transmission using a LoRa technology and to select suitable hardware for creating a measuring station. Subsequently, setting up radio module with sensors and developing web application that will collect, store and present the data from the measuring station. This thesis includes tests of power consumption, range and transmission reliability of the end node.
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Assembling and creating tasks for an interactive robotic head
Szabó, Michal ; Formánek, Martin (referee) ; Bastl, Michal (advisor)
This bachelor’s thesis deals with the creation of the model of an interactive robotic head. The work itself is divided into two parts, theoretical and practical. The theoretical part is devoted to an overview of the types of robotic heads, a brief description of the available tools for recognizing objects in the image and tools for recognizing spoken speech in real time. The practical part is focused on the tools used in programming of this model, the electronics used and the resulting model of the robotic head. Finally, there are described programmed functions enabling various ways of the interaction with humans. The work includes function scripts programmed in Python.
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2D position sensor for planar positioning platforms
Brisuda, Dominik ; Adámek, Roman (referee) ; Rajchl, Matej (advisor)
This bachelor thesis deals with processing of the overview of 2D position sensors available and suitable for mechatronic systems such as “Ball on plate system”. With these systems it is inevitable for the system regulators to receive the most precise coordinates of the body position in sufficiently fast time. Another important thing is the shape, size, weight, and material of the regularized subject moving on the sensor. This statement follows, that different types of sensors will have different reactions for the given subject. Therefore, there is an overview of types of 2D sensors in the first part of the thesis. Afterwards, their suitability for given systems was considered. In the second part of the thesis there is a project of a unit for signal processing. This unit will record the signal from the sensor and drive it onto 2 outputs, which output voltage values will represent the placement of object on the sensor. By this processing, the position will be easily worked with, for example to bring it straight to the regulator. In the last part of the thesis the system was tested. The speed of scanning unit was measured, as well as the quality of the tested sensor. With the sensor quality linearity, minimal activating force and noise of the output signal on different places with different ballast weight were measured.
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Tool change system for 3D printer
Karniš, Radim ; Arm, Jakub (referee) ; Bradáč, Zdeněk (advisor)
The aim of this thesis is to design and implement a toolchaning system for a 3D printer. As a consequence of such expansion, the printer gains the ability of multimaterial printing and switching between a number of active and passive tools during a single production process. In addition to extensive research of other currently available solutions, this thesis describes the complete mechanical and electrical design process of the device. It also documents the implementation of a functional sample, the creation of software both for the base system and the toolchanger expansion, and the implementation of an associated optical measurement and calibration system.
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