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Tensile and Fatigue Testing of Thin Fibres and Foils
Štěrbáček, Jaroslav ; Liškutín, Petr (referee) ; Kruml, Tomáš (advisor)
A testing system MTS Tytron 250 with an original construction was bought at the Institute of Physics of Materials, AVCR v.v.i. The main aim of this diploma thesis was to obtain experiences with the controlling of the system and with its advantages and limitations. The tensile tests were performed on Al fibres with diameters of 125 micrometer, 180 micrometer a 500 micrometer, nylon fibres of 250 micrometer and 500 micrometer and tensile and cyclic tests on Al foil of 77 micrometer in thickness. It was found that the machine is suitable for testing of either subtle specimens with low loading forces or specimens with low stiffness as e.g. polymers or very long metallic or ceramic fibres. On the other side, the Tytrom system is not able to perform tests on specimens with a high stiffness and high loading forces. Material parameters were determined with a high reproducibility. Advantages and limitations of several types of subtle specimen's fixation into the grips were studied too.
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Robotic Arm with Model Servos
Bobčík, Petr ; Nosko, Svetozár (referee) ; Zemčík, Pavel (advisor)
The main goal of this thesis was to create my own robotic manipulator, which is controlled by its own user interface. I made a robotic arm based on computer Raspberry Pi 3B+ with 5 digital servos and a gripping mechanism in the form of a claw, to which I also attached a laser pointer. The user interface problematics was solved by creating a simple web page (combination of HTML, PHP and JS), which i placed into the Apache 2 web server (installed in Raspberry Pi). I successfully incorporated a way to control the servo one by one and how to control the whole arm with inverse kinematics into the user interface.
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Design of Electric Scissors for Fabric
Nyklová, Klára ; Buganská, Tamara (referee) ; Fridrichová, Eva (advisor)
Topic of this bachelor´s thesis is a design of electric scissors for fabric. The work deals with analysis of contemporary state of knowledge, basic technical parameters and own design solution of eletric sccisors for fabric. The aim of this thesis is visually attractive design, which will fulfill all technical, ergonomic and aesthetic requirements.
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Design of a Robotic Cell for Object Placement into a Lathe
Baláková, Marie ; Kubela, Tomáš (referee) ; Pochylý, Aleš (advisor)
This diploma thesis deals with the design of a workplace concept for the purpose of machining semifinished bolts used in automotive industry. The workplace includes a special purpose machine, input and output slip and robotic handling. Layout of the workplace is also part of the work. Further, the work is focused on the specific design of the special purpose machine and the 6th-axis robot gripping end effector is more detailed.
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Low cycle fatigue of pseudoelastic NiTi alloy
Kaňová, Monika ; Hutař, Pavel (referee) ; Pantělejev, Libor (advisor)
This work is focused on study of mechanical properties of NiTi alloy which shows pseudoelastic and shape memory behaviour. Functional and structural fatigue of the material is examined. The main aim of this work was to perform and to evaluate a series of fatigue tests. The material was supplied in the form of wire which was gripped in the machine using special grips. In the first part of the experiment, tensile tests are evaluated and the reproducibility of measurements is demonstrated. Then, a series of cyclic tests was performed. Results were analysed together with previous measurements. One part of discussion concerned changes of the hysteresis loops during cycling and their dependence on strain rate. The fatigue life curves were plotted. It was found that these curves have non-standard shapes. The reasons for this are explained in the work.
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Haptic feedback device design for aircraft control
Dubnický, Lukáš ; Jebáček, Ivo (referee) ; Zikmund, Pavel (advisor)
This master thesis is focused on design of control stick grip and rudder pedals extension. These components are equipped with active elements, which provide pilot with haptic feedback. The purpose of the introduced design is to allow prototype to be built into the aeroplane so that the proposed concept of haptic feedback can be tested onboard. It shall verify used technical solutions as well to allow for their application on following development stages that aim at certification of the proposed haptic feedback system to be used in general aviation aeroplanes. The designed components are the successors of prototypes used for experiments carried on flight simulator. The design process follows the requirements of legislation and outcomes of the previous experiments. This thesis follows the design process from setting of the design requirements to mechanical test of 3D printed prototypes.
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Comparison of collaborative and non-collaborative robots
Krajčovič, Matej ; Burian, František (referee) ; Macho, Tomáš (advisor)
The bachelor thesis was focused on comparing collaborative and non-collaborative robots from ABB. Currently, the development of collaborative robots is advancing. The bachelor thesis contains the characteristics of collaborative and non-collaborative robots. Collaborative robots are capable of working with humans, which companies can use in multiple applications. They differ from non-collaborative robots in load capacity, reach, price and cycle time. The results were achieved using simulations from the Robotstudio program and from the relevant documents for collaborative and non-collaborative robots.
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Structural members of prostheses of upper extremities
Mužný, Lukáš ; Opl, Miroslav (referee) ; Matějka, Petr (advisor)
This bachelor thesis deals with the upper limb prosthesis. The target of the project is to create an overview of the distribution and types of prostheses and their individual elements. In particular, it deals with the problem myoelctric prostheses. Provides information on the biomechanics of human arm, specifies options grip of the object, gives an overview of the research centers and their substitutes developed upper limbs. It also focuses on the possibility of prostheses control by myoelectric signals.
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Uderslung sectional manipulator
Horníček, Zdeněk ; Nosterský, František (referee) ; Pokorný, Přemysl (advisor)
This diploma thesis deals with a project of the underslung sectional manipulator, which will be used in galvanic plants for material transportation. It deals specifically with the problem of swinging the weight during the main travel. It is also concerned with a design of options on frame gripping between the manipulators and with a design of control of the panel performing a vertical motion on the pillar.
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Design and digital commissioning of the bag handling gripper
Vávra, Daniel ; Pavlík, Jan (referee) ; Vetiška, Jan (advisor)
This bachelor‘s thesis deals with a conceptual design of a handling gripper for 25-kilo bags and its subsequent digital commissioning. The theoretical part explains the issue with end effectors for handling, including introduction of specific concepts of bag handling grippers by chosen companies. There is also a problematic of virtual commissioning mentioned in the end of the theoretical part. The practical part deals with the conceptual design of the gripper itself, which is then substantiated by needed strength and kinematic analysis in a calculation report. The main advantage of designed solution is, apart from high moving speed, pallet gripping mechanism, due to which the gripper is able to prepare pallets for subsequent bag palletization automatically. In the end, the chosen conceptual solution is digitally commissioned in ABB Robot Studio program, along with creating a simulation of gripper moves.
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