DISSERTATION TOPICS

DISSERTATION TOPICS

Results

Development of magnetorheological dampers for semi-active control
Vývoj magnetoreologických tlumičů pro semi-aktivní řízení

Aim of thesis: The aim of the topic is the research and development of a fast magnetorheological damper including algorithms for semi-active control leading vibration and shock mitigation. The R&D can be focused into several fields such as (i) dampers for electric enduro bicycle; (ii) damper for seat suspension of trucks or agricultural machines; (iii) dampers for mitigation of extreme shocks; (iv) dampers for aircraft landing gear; (v) motorcycle dampers. This topic is opened for three students.
  • Participation in the projects: (i) Development of magnetorheological damping system for chassis of railway vehicles; (ii) Development of semi-active algorithm for control of yaw dampers at speeds +200 km/hod; (iii) Development of electric endure bicycle with electronically controlled dampers, cooperation with foreign universities Maryland, INHA, Krakow, possibility of internships at these universities.
Supervisor: doc. Ing. Ivan Mazůrek, CSc.
Co-supervisor: Ing. Michal Kubík, Ph.D.

Research and development of magnetorheological fluids
Výzkum a vývoj magnetoreologických kapalin

Aim of thesis: The main aim is the research and development of high stable magnetorheological fluid with high magnetorheological effect, enhanced response time, long lifetime and tribological properties with minimal abrasive effect on contact pairs. The topic is also focused on the study of the rheological behavior of new MR fluids, especially at high shear rates and strong magnetic field. This topic is opened for three students.
  • Participation in the project GAČR "Study of time response of magnetorheological fluid", cooperation with foreign universities Maryland, INHA, Nice, Dresden, Krakow and czech univerzity in Zlin, possibility of internships at these universities.
Supervisor: doc. Ing. Ivan Mazůrek, CSc.
Co-supervisor: Ing. Michal Kubík, Ph.D.

Research and development of magnetorheological fluid seal
Výzkum a vývoj magnetoreologického těsnění

Aim of thesis: The main goal of this topic is an innovation of magnetorheological fluid seal which allows a high level of tightness with respect to the possible leakage of the carrier fluid in extreme conditions. This is an experimental work using the existing experimental devices. The topic is opened for 1 student.
  • Cooperation with foreign universities Maryland, INHA, Nice, Dresden, Berlin and Krakow with the possibility of internships at these universities.
Supervisor: doc. Ing. Ivan Mazůrek, CSc.
Co-supervisor: Ing. Michal Kubík, Ph.D.

Development of structured magnetic circuits
Vývoj strukturovaných magnetických obvodů

Aim of thesis: The aim of the topic is the research and development of structured magnetic circuits manufactured by 3D print. The R&D can be focused into several fields such as (i) development of structured rotors of electromotors; (ii) development of pistons for fast magnetorheological dampers; (iii) development of fast electromagnetic valves. The topic is opened for 2 students.
  • Participation in the projects: (i) Development of magnetorheological damping system for chassis of railway vehicles; (ii) Structured components for electromagnetic applications; (iii) Development of electric endure bicycle with electronically controlled dampers, cooperation with foreign universities Maryland, INHA, Krakow, Tsinghua Beijing possibility of internships at these universities.
Supervisor: doc. Ing. Ivan Mazůrek, CSc.
Co-supervisor: Ing. Zbyněk Strecker, Ph.D.

Advanced diagnostics of wind turbine bearings
Pokročilá diagnostika stavu ložisek větrných elektráren

Aim of thesis: State prediction methods and monitoring the development of measured quantities, especially rotary machines, can be used to estimate the remaining operating time to failure and to plan maintenance. The main focus is on the development of a new monitoring and diagnostics system, especially the key parts of the rotor bearing using remote data transmission. Furthermore, there will be close cooperation in solving partial tasks of the development of a new type of bearing for mounting the main rotor of wind power plants. The main goal will be the design and verification of the methodology of continuous monitoring of wind turbine bearings and the secondary goals will be focused on the development of predictive methods for calculating the time to failure and technical possibilities of remote data transmission between the measured object and the service organization.
  • Participation in solving Technology Agency of the Czech Republic projects, cooperation with manufacturers in the Czech Republic, possibility of internship.
Supervisor: doc. Ing. Milan Klapka, Ph.D.
Co-supervisor: Ing. František Vlašic, Ph.D.

Tribology of implants for local articular cartilage replacement
Tribologie implantátů pro lokální náhradu kloubní chrupavky

Aim of thesis:
Supervisor: doc. Ing. Martin Vrbka, Ph.D.
Co-supervisor: Ing. Matúš Ranuša, Ph.D.

Biotribology of artificial tears for the treatment of dry eye syndrome
Biotribologie umělých slz pro léčbu syndromu suchého oka

Aim of thesis:
Supervisor: doc. Ing. Martin Vrbka, Ph.D.
Co-supervisor: doc. Ing. David Nečas, Ph.D.

Application of tribological methods for prediction of wear of dental materials during tooth cleaning
Využití tribologických metod pro predikci opotřebení dentálních materiálů při čištění zubů

Aim of thesis:
Supervisor: doc. Ing. Martin Vrbka, Ph.D.
Co-supervisor: Ing. Pavel Čípek

Tribology of polymers for shoe sole application
Tribologie polymerních materiálů pro výrobu podešví

Aim of thesis:
Supervisor: doc. Ing. Martin Vrbka, Ph.D.
Co-supervisor: Ing. David Rebenda, Ph.D.

Research and development of hydrogel-based artificial cartilage
Výzkum a vývoj umělé kloubní chrupavky na bázi hydrogelu

Aim of thesis:
Supervisor: doc. Ing. David Nečas, Ph.D.
Co-supervisor: Ing. David Rebenda, Ph.D.

The potential of coating in research and development of joint replacements
Možnosti aplikace povlaků ve výzkumu a vývoji kloubních náhrad

Aim of thesis:
Supervisor: doc. Ing. David Nečas, Ph.D.
Co-supervisor: doc. Ing. Martin Vrbka, Ph.D.

Design of semiactive suspension systém for mountain bikes
Návrh semiaktivního systému odpružení pro horská kola

Aim of thesis: The aim of the work will be to develop a system of intelligent mountain bike suspension. Current commercially available electrically controlled bike suspension systems do not exploit the potential for fast semi-active control. Current systems only allow automatic control of valves, which used to be set manually on older models. However, due to the quality of the ride, these electrically controlled shock absorbers are not able to provide better driving characteristics compared to the optimally set passive or adaptive shock absorber. Fast semi-active damping with magnetorheological dampers enables a qualitative improvement in the achievable driving comfort and wheel grip on the road. Demonstrators of individual components are currently being developed. However, it will be necessary to integrate these components into the entire functional system and experimentally verify the functionality. The focus of the work will be mainly on finding the limiting properties of real elements of the system (dampers, sensors, etc.) and the subsequent design of optimal system control. An important part of the work will be driving tests.
  • Cooperation with a commercial partner in the field of mountain bike production and suspension is expected (currently searching for suitable partner)
Supervisor: doc. Ing. Ivan Mazůrek, CSc.
Co-supervisor: Ing. Zbyněk Strecker, Ph.D.

Design of a fast semi-active damper with a solenoid valve for railway vehicles
Návrh rychlého semiaktivního tlumiče s elektromagnetickým ventilem pro kolejová vozidla

Aim of thesis: The current development of railway vehicle bogies shows considerable potential for improving ride quality by means of semi-active dampers. The models have so far tested the benefits of fast magnetorheological dampers, which are expensive and too progressive in the conservative community of railway vehicle developers. These problems could be eliminated if conventional semi-active dampers with solenoid valve control were available on the market. However, the change in damping force in response to the control signal of currently available dampers of this type is too slow. The aim of this work is the development and experimental verification of a semi-active damper with a solenoid valve with a fast time response.
  • Cooperation with Strojírna Oslavany company within TAČR project
Supervisor: doc. Ing. Ivan Mazůrek, CSc.
Co-supervisor: Ing. Zbyněk Strecker, Ph.D.

Additivelly manufactured structures with shape memorry effect
Aditivně vyráběné struktury s tvarovou pamětí

Aim of thesis:
  • Participation in the international project BAANG . Half-year internship at the Technical University Vienna.
Supervisor: doc. Ing. Daniel Koutný, Ph.D.
Co-supervisor: Ing. Ondřej Červinek

Increasing efficiency of polymer gears
Zvyšování účinnosti polymerního ozubení

Aim of thesis: The goal is to find out how polymers mechanical properties with the temperature and frequency dependence influence film thickness, friction and load carrying capacity. It is experimental theme where results will be compared with numerical model developed by international partner. Use of plastic polymers on lubricated gears is efficient for production and operation.
  • Cooperation and internships at foreign partners
Supervisor: prof. Ing. Ivan Křupka, Ph.D.
Co-supervisor: Ing. Petr Šperka, Ph.D.

Mechanism of generation and propagation of wheel-rail contact noise
Mechanismus vzniku a šíření hluku z kontaktu kola a kolejnice

Aim of thesis: The aim of the work is to find the key operational parameters that influence the generation and especially the propagation of squealing noise in wheel-rail contact with controlled adhesion. It is assumed to develop a suitable numerical simulation model and its experimental verification. The research will be carried out in collaboration with a research institute at Southwest Jiaotong University in China.
  • Opportunity for internship at a top research institute at Southwest Jiaotong University in China.
Supervisor: doc. Ing. Milan Klapka, Ph.D.
Co-supervisor: Ing. Radovan Galas, Ph.D.

Prevention of wheel squeal noises of railroad traffic
Prevence vzniku kvílivých hluků v kolejové dopravě

Aim of thesis: The aim of the work is to develop technical solutions for reduction of squealing noises in wheel-rail contact with controlled adhesion. The subject of the solution is the design of a complex predictive method for the application of top of rail products and its experimental verification in real conditions on selected tram lines in Brno. The research will be carried out in close cooperation with DPMB, which is struggling with such noise in urban areas.
  • Close collaboration with Brno Transport Company.
Supervisor: doc. Ing. Milan Klapka, Ph.D.
Co-supervisor: Ing. Radovan Galas, Ph.D.

Reduction of noise of electric car suspension
Redukce hluku závěsu kola elektromobilu

Aim of thesis: The aim is to describe the mechanisms which can cause radiation of noise from the damping elements of the suspension of electric vehicles. Using experiments and simulations, the key operating conditions and their influence on the noise from semi-active dampers will be determined. The research will be carried out in cooperation with the Cracow University of Technology.
  • Possibility of an internship at a specialised research institute at Cracow University of Technology.
Supervisor: doc. Ing. Milan Klapka, Ph.D.
Co-supervisor: Ing. Michal Kubík, Ph.D.

Increasing performance parameters of hydrostatic bearing
Zvyšování výkonnostních parametrů hydrostatického ložiska

Aim of thesis: The aim is manufacturing and power optimization of the pocket and recess geometry of a large-scale hydrostatic bearing using CFD simulation with experimental verification. This is an experimental research work leading to the reduction of the loss factor and energy efficiency of hydrostatic bearings.
Supervisor: doc. Ing. Petr Svoboda, Ph.D.
Co-supervisor: Ing. Michal Michalec

Influence of non-stationary electric field on behavior of ionic liquids
Vliv nestacionárního elektrického pole na chování iontových kapalin

Aim of thesis: The aim is to clarify the mechanism of forming a lubricating film in highly loaded contacts lubricated by ionic liquids under the influence of an unsteady electric field. This is an experimental work based on the use of colorimetric interferometry, which includes the development of an experimental simulator for measuring the friction, thickness and temperature of the lubricant.
Supervisor: doc. Ing. Petr Svoboda, Ph.D.
Co-supervisor: Ing. Petr Šperka, Ph.D.

Development of solid friction modifier for railway
Vývoj tuhých modifikátorů tření pro kolejovou dopravu

Aim of thesis: The thesis aims to develop a new solid friction modifier. Experimental development of solid friction modifier includes evaluation of adhesion in the contact, wear, surface damage and conductivity of contact. In addition, the behaviour of solid friction modifiers will be studied for various contact contamination conditions.
  • Cooperation on development with leading foreign institution.
Supervisor: prof. Ing. Martin Hartl, Ph.D.
Co-supervisor: Ing. Radovan Galas, Ph.D.

Modelling of wheel-rail interface
Modelování rozhraní kolejové vozidlo-kolej

Aim of thesis: The aim of this work is to create a model for the study of tribological phenomena occurring in the wheel-rail contact. The model will be validated experimentally and utilized to study the effect of contaminants, materials for rail head conditioning and third-body layer with respect to frictional properties and other aspects of the contact interface.
  • Work on the project of the Technology Agency of the Czech Republic
Supervisor: prof. Ing. Martin Hartl, Ph.D.
Co-supervisor: Ing. Daniel Kvarda

An experimental research on damage mechanism of journal bearings
Experimentální výzkum mechanizmů poškození kluzných ložisek

Aim of thesis: The work is focused on the experimental study of limit states and damage of large plain bearings for wind power plants. The aim is to implement advanced methods (vibrodiagnostics, acoustic emission) for condition monitoring and diagnosis of damage occurrence and propagation into the testing methodology.
  • Cooperation with industry and use of unique observation techniques.
Supervisor: prof. Ing. Ivan Křupka, Ph.D.
Co-supervisor: Ing. Milan Omasta, Ph.D.

Research on textured sliding surfaces
Výzkum texturovaných kluzných povrchů

Aim of thesis: The work is focused on the experimental study of friction and lubrication of sliding contacts with textured surfaces. The aim is to use advanced optical methods to elucidate the contribution of individual local effects to the behaviour of this thermohydrodynamic contact.
  • Cooperation of leading domestic institutes on a basic research project.
Supervisor: prof. Ing. Ivan Křupka, Ph.D.
Co-supervisor: Ing. Petr Šperka, Ph.D.

Analysis of lubricated contacts by machine-based learning
Analýza mazaných kontaktu pomocí strojového učení

Aim of thesis: The aim is to apply algorithms of machine-based learning for experimental data analysis of lubricated point contact. The theme deals with relation of friction and film thickness for real rough surfaces. Developed algorithms will find out new empirical dependencies by automatic analysis of large set of measured data.
  • Cooperation and internships at foreign partners
Supervisor: prof. Ing. Ivan Křupka, Ph.D.
Co-supervisor: Ing. Petr Šperka, Ph.D.

Motion Accuracy Analysis of a Large-Scale 3D Printer Using Optical Methods
Analýza přesnosti pohybu velkorozměrové 3D tiskárny pomocí optických metod

Aim of thesis: A review of existing methods for examination of the motion accuracy of a large-scale 3D printer. Design of the optical inspection system of the print head motion and its implementation. Experimental testing and data analysis. Identification of key parameters affecting the accuracy of the print head movement.
  • Work on the emerging technology of large-scale additive manufacturing
Supervisor: doc. Ing. Daniel Koutný, Ph.D.
Co-supervisor: Ing. Tomáš Koutecký, Ph.D.

Tribology of the wheel-rail interface
Tribologie rozhraní kolejové vozidlo-kolej

Aim of thesis: The aim is to clarify the behavior of substances affecting the friction in the wheel-rail contact, depending on the composition of the friction layer which is formed naturally on the surface of the contact bodies. It is an experimental work exploring the interaction of natural contaminants and other substances deliberately applied to the contact.
  • Involvement in an international research project
Supervisor: prof. Ing. Martin Hartl, Ph.D.
Co-supervisor: Ing. Milan Omasta, Ph.D.

Development of wheel-rail contact wear diagnostic tool
Vývoj nástrojů pro diagnostiku opotřebení kontaktu kola a kolejnice

Aim of thesis: When the rolling stock moves through a rail curve, there is an increased friction and wear between the wheel flange and rail gauge. The aim of this work is to develop an experimental method and device for operational monitoring and diagnosis of the rate of friction and wear at this contact. Vibration and acoustic diagnostic tools will be utilized.
  • Development of equipment to be implementated in real operation
Supervisor: prof. Ing. Martin Hartl, Ph.D.
Co-supervisor: Ing. Milan Omasta, Ph.D.

Development of a magnetorheological shock attenuation system for military applications
Vývoj magnetoreologického systému tlumení rázových dějů pro armádní aplikace

Aim of thesis: The aim of the work is to design a system for damping of fast shock events. The development of a magnetorheological damping element and the design of its semi-active control are assumed. The research will be supported by the European Defence Agency project.
  • The research is supported by the European Defence Agency EDA. Possibility of an internship abroad.
Supervisor: doc. Ing. Milan Klapka, Ph.D.
Co-supervisor: Ing. Michal Kubík, Ph.D.

NDT evaluation of concrete mixture quality used for 3D printing
NDT hodnocení kvality betonových směsí využívaných pro 3D tisk

Aim of thesis: 1) To perform the compilation of different test methods on hardened printed concrete to investigate the mechanical properties. 2) To investigate the influence of concrete age and interval time on the mechanical properties. 3) To monitor the material’s degradation behaviour in order to detect locally restricted and distributed micro-cracks arising in combination with plastic deformation. 4) To investigate the development of average flexural and compressive strength in fiber reinforcement mixtures.
  • Cooperation with selected research departments, cooperation on TACR projects.
Supervisor: doc. Ing. Milan Klapka, Ph.D.
Co-supervisor: Ing. František Vlašic, Ph.D.

3D printing of cement composites for construction
3D tisk cementových kompozitů pro stavebnictví

Aim of thesis: Development of 3D printing technology for cement mixtures with a larger aggregate fraction and controlled dosing of accelerators ensuring economical and efficient production of building components. Solution of the topic presupposes involvement in the development of specific equipment and preparations for mixing, transport and dosing of cement mixture, including simulation of production, process control and material development.
  • Involvement in the national competence center for advanced materials and efficient buildings
Supervisor: doc. Ing. Daniel Koutný, Ph.D.
Co-supervisor: Ing. David Škaroupka, Ph.D.