|
|
Driving dynamics of a tractor
Renza, Jaroslav ; Bradáč, Albert (referee) ; Panáček, Vladimír (advisor)
This thesis analyses driving dynamics of tractors and its dependence on their weight and age. In the beginning, brief history of tractor development and definition of basic concept of the tractor analysis is described. The thesis states procedures for obtaining magnitudes necessary for determining of driving dynamics. Experimental part describes the realized measurement on chosen sample of tractors and interprets measured values. Last part of the thesis contains evaluation of the measurement results.
|
|
|
Selected Driving Manoeuvres of Motorcyclists
Kriegsmann, Luděk ; Bradáč, Albert (referee) ; Semela, Marek (advisor)
The entire diploma thesis is designed into two parts. The first part is focused on the theoretical description of the construction of motorcycles. In particular, the theoretical part deals with the description of the types of motorcycles, types of frames, types of suspension and the description of braking systems used on motorcycles. In the theoretical part, the main parameters of the motorcycle are also addressed, which affect the handling and stability of the motorcycle while riding. The last theoretical part deals with the technique of riding a motorcycle. The second part is focused directly on the execution of the experiment. The experiment consists of measuring five disciplines, namely measuring acceleration, measuring braking deceleration using brakes, measuring deceleration by the engine, measuring exit from an intersection and measuring lateral displacement. Eight motorcycles took part in the measurement. The main outputs from the measurements are time data, deceleration and lateral acceleration values.
|
|
|
Analysis of Selected Manoeuvres of Bicyclists
Špačková, Kateřina ; Belák, Michal (referee) ; Semela, Marek (advisor)
This diploma thesis Analysis of selected manoeuvres of bicyclists deals with the history and development of the bicycles, further their division of, construction, analysis accident and national legislation in the theoretical part. The practical part of the master thesis is devoted to the measurements of the bicycles. Specifically, it is about acceleration, deceleration, transverse movement, ride in the curve and looking back before changing the direction. For measuring are selected different type of bikes with different construction. The results of individual measurements are evaluated in the end of the diploma thesis.
|
|
|
Lane change manoeuvre of modern vehicles on wet surface
Mikulec, Roman ; Kropáč, František (referee) ; Mičunek, Tomáš (referee) ; Semela, Marek (advisor)
This dissertation investigates the possibilities of determining the minimal duration of modern vehicles lane change manoeuvre on the wet road surface. In cases when the driver changed lanes or swerved before or during the crash, analysis of this manoeuvre should be carried out, as well as part of a collision avoidance investigation. The issue of lane change has been addressed in several theses in the past, but most of these theses were based on the results of measurements on the dry road surface. It is, therefore, necessary to investigate the applicability of the existing calculation methods to the situation of reduced adhesion conditions, together with the considerable time lag from most of the earlier studies, and therefore the considerable advances in vehicle design and driving stability systems. For this reason, several series of driving tests have been carried out with modern vehicles on predominantly wet road surfaces. These measurements have provided essential input and output variables used to analyse the current calculation methods and determine the set-up of the driving stability systems in simulation programs. Based on the statistical analysis, the so-called Kovařík equation, which has been used so far, was evaluated as the most suitable method for calculating the duration of lane-change manoeuvre, for which a new value of the mathematical constant was found. An alternative calculation of the longitudinal distance travelled by the vehicle in the manoeuvre is also presented in this dissertation.
|
|
|
Driving Dynamics of Motorcycles
Šplíchal, David ; Tylšar, Vladimír (referee) ; Semela, Marek (advisor)
This diploma thesis called Motorcycle Race Dynamics captures the development and development of motorcycles, a description of types, design elements and the techniques of riding a motorcycle. However, the aim of this work is to organize, perform and evaluate the measurement of braking deceleration and the crossing of motorcycles. Before separate data processing, a theoretical methodology for measuring transverse displacement and braking deceleration is proposed. This requires enough motorcycles, experienced riders, two cameras, a measuring instrument and precisely dimensioned lines. The lateral displacement and braking deceleration measurements are then performed and subsequently evaluated. Output of this work include, in addition to videos, an overview of transverse displacement times, or longitudinal deceleration output values gained from braking.
|
|
|
Analysis of the Lateral Displacement Time of Motocycles
Friedel, Daniel ; Tylšar, Vladimír (referee) ; Semela, Marek (advisor)
Diploma thesis named Analysis of the lateral displacement time of motorcycles captures formation and development of motorcycles, description of construction and proper techniques for riding a motorcycle. The main aim of this work is to organise and perform the measurement of the lateral displacement and deceleration of the motorcycles. These values will serve for forensic experts. Before the measurement was proposed methodology for the measurement of the lateral displacement by used two cameras and long chalk line. Follow measurement and evalution measurement of the lateral displacement and deceleration. Outputs from this thesis are values of the lateral acceleration necessary for calculation of the shortest lateral displacement time of the motorcycle and 96 videos with course and result of measurements.
|
|
|
Lane change manoeuvre of modern vehicles on wet surface
Mikulec, Roman ; Kropáč, František (referee) ; Mičunek, Tomáš (referee) ; Semela, Marek (advisor)
This dissertation investigates the possibilities of determining the minimal duration of modern vehicles lane change manoeuvre on the wet road surface. In cases when the driver changed lanes or swerved before or during the crash, analysis of this manoeuvre should be carried out, as well as part of a collision avoidance investigation. The issue of lane change has been addressed in several theses in the past, but most of these theses were based on the results of measurements on the dry road surface. It is, therefore, necessary to investigate the applicability of the existing calculation methods to the situation of reduced adhesion conditions, together with the considerable time lag from most of the earlier studies, and therefore the considerable advances in vehicle design and driving stability systems. For this reason, several series of driving tests have been carried out with modern vehicles on predominantly wet road surfaces. These measurements have provided essential input and output variables used to analyse the current calculation methods and determine the set-up of the driving stability systems in simulation programs. Based on the statistical analysis, the so-called Kovařík equation, which has been used so far, was evaluated as the most suitable method for calculating the duration of lane-change manoeuvre, for which a new value of the mathematical constant was found. An alternative calculation of the longitudinal distance travelled by the vehicle in the manoeuvre is also presented in this dissertation.
|
|
|
Selected Driving Manoeuvres of Motorcyclists
Kriegsmann, Luděk ; Bradáč, Albert (referee) ; Semela, Marek (advisor)
The entire diploma thesis is designed into two parts. The first part is focused on the theoretical description of the construction of motorcycles. In particular, the theoretical part deals with the description of the types of motorcycles, types of frames, types of suspension and the description of braking systems used on motorcycles. In the theoretical part, the main parameters of the motorcycle are also addressed, which affect the handling and stability of the motorcycle while riding. The last theoretical part deals with the technique of riding a motorcycle. The second part is focused directly on the execution of the experiment. The experiment consists of measuring five disciplines, namely measuring acceleration, measuring braking deceleration using brakes, measuring deceleration by the engine, measuring exit from an intersection and measuring lateral displacement. Eight motorcycles took part in the measurement. The main outputs from the measurements are time data, deceleration and lateral acceleration values.
|
|
|
Analysis of Selected Manoeuvres of Bicyclists
Špačková, Kateřina ; Belák, Michal (referee) ; Semela, Marek (advisor)
This diploma thesis Analysis of selected manoeuvres of bicyclists deals with the history and development of the bicycles, further their division of, construction, analysis accident and national legislation in the theoretical part. The practical part of the master thesis is devoted to the measurements of the bicycles. Specifically, it is about acceleration, deceleration, transverse movement, ride in the curve and looking back before changing the direction. For measuring are selected different type of bikes with different construction. The results of individual measurements are evaluated in the end of the diploma thesis.
|
|
|
Driving Dynamics of Motorcycles
Šplíchal, David ; Tylšar, Vladimír (referee) ; Semela, Marek (advisor)
This diploma thesis called Motorcycle Race Dynamics captures the development and development of motorcycles, a description of types, design elements and the techniques of riding a motorcycle. However, the aim of this work is to organize, perform and evaluate the measurement of braking deceleration and the crossing of motorcycles. Before separate data processing, a theoretical methodology for measuring transverse displacement and braking deceleration is proposed. This requires enough motorcycles, experienced riders, two cameras, a measuring instrument and precisely dimensioned lines. The lateral displacement and braking deceleration measurements are then performed and subsequently evaluated. Output of this work include, in addition to videos, an overview of transverse displacement times, or longitudinal deceleration output values gained from braking.
|
guest ::
