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Effect of Shock Absorber on Vehicle Limits
Jurka, Adam ; Blaťák, Ondřej (referee) ; Hejtmánek, Petr (advisor)
The aim of this master’s thesis is to evaluate the effect of shock absorber on vehicle limits. At the beginning of the thesis, shock absorber properties were described. Then computational model was created and manoeuvres for shock absorber behaviour were defined. Created mathematical model is based on quarter model of a car and excitation in form of road with a random profile is an essential part of the model. This model was used for evaluation of heave. After heave analysis, shock absorber behaviour during drive was investigated. Drive conditions were defined as set of handling manoeuvres. For the drive investigation, complete multibody virtual model of racing car was used. Based on drive investigation analysis, optimal damping characteristics for each manoeuvre were found. Furthermore, each optimal characteristic was compared for different manoeuvres. Obtained results were compared. As a conclusion, compromise damping characteristic was suggested with the aim to fit the combination of all defined drive conditions. Final part of the thesis was aimed at validation of the computational model. Data measured during real drive were used as an input for this validation.
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Kinematics analysis of race car suspension
Jurka, Adam ; Blaťák, Ondřej (referee) ; Hejtmánek, Petr (advisor)
This bachelor thesis is aimed on kinematic analysis of the race car suspension. In the first part of the thesis geometry parameters of suspension and their influence on driving behavior are explained. Additionally measuring methods of suspension geometry and their use in real life applications are described. Then kinematic points of the race car Peugeot 208 R2 are found and measured using 3D optical method. For better evaluation of measured data virtual model of each axle is created in Adams Car simulation software. After that kinematic analysis is performed. This analysis describes change of parameters in car suspension depending on wheel trajectory. As a conclusion results of the analysis are discussed. Moreover new methodology for better and more precise evaluation of car suspension analysis is introduced and described.
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Design of alignment and chassis setup equipment
Vajdák, Martin ; Bradávka, Marek (referee) ; Porteš, Petr (advisor)
Diplomová práce se zabývá návrhem zařízení pro měření parametrů podvozku závodního vozidla (sbíhavost/rozbíhavost, příklon/odklon, světlá výška vozu, rozložení hmotnosti), které následně slouží pro jeho seřízení. Úvodní teoretická část uvádí přehled nejdůležitějších parametrů podvozku, které mají podstatný vliv na chování a ovladatelnost vozu a které jsou tak nejčastěji předmětem zájmu. Následující kapitola shrnuje metody a zařízení, které se dnes pro měření parametrů podvozku využívají a uvádí jejich výhody a nevýhody. Předposlední kapitola teoretické části je věnována obecným doporučením pro měření parametrů podvozku vozidla a jeho seřizování. Poslední kapitola teoretické části uvádí požadavky na zařízení, jehož návrh je předmětem této práce. Úvod praktické části práce je věnován popisu konstrukce dvou navržených variant pro měření parametrů podvozku vozidla. Následující kapitola pak popisuje přípravu a průběh měření s využitím navržených souborů zařízení. Další kapitola je věnována výběru snímačů a zařízení pro měření. Závěr této kapitoly pak shrnuje přibližné celkové náklady na výrobu obou navržených variant. Poslední kapitolou je napěťová a deformační analýza navržené podpěry automobilu, která podepírá automobil namísto jeho kol. Závěr diplomové práce shrnuje dosažené cíle a zároveň uvádí návrhy a doporučení dalšího vývoje navržených zařízení.
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Longitudinal dynamics of cars
Porteš, Petr ; Fojtášek, Jan (referee) ; Zháňal, Lubor (advisor)
Aim of this thesis is to find optimum gear ratios for completing one lap in formula-type racing car in minimum possible time. Thesis is divided into two parts – theoretical and practical. In the first part basic knowledge of longitudinal dynamics of racing cars is summarized, in the second part gear ratio optimization algorithm created in MATLAB is presented.
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Formula Student Anti Roll Bar System Design
Urban, Marek ; Janoušek, Michal (referee) ; Ramík, Pavel (advisor)
This bachelor’s thesis is focused on design of rear anti roll bar system of single-seated Formula student car. It is a concept with torsional bar and third damper used for example in Formula 1. Design is partially inspired by topology optimization. The emphasis is on optimization using finite element method to achieve desired stiffness at low weight. Optimization is done in series of static analysis iterations of individual parts and of the whole system in several driving states. Design of front anti roll bar system with adjustable blades is made along with front third rocker system.
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The use of air springs for race car
Blažek, Jakub ; Zháňal, Lubor (referee) ; Porteš, Petr (advisor)
This diploma thesis studies the use of air springs for race car, precisely Formula Student race car. Research part of the thesis deals with choosing suitable air spring for given application. In practical part, there is computation of parameters for appropriate setting of air spring, so it will comply with the rules of Formula Student. There is also simulation of air spring functionality in real use.
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Effect of Shock Absorber on Vehicle Limits
Jurka, Adam ; Blaťák, Ondřej (referee) ; Hejtmánek, Petr (advisor)
The aim of this master’s thesis is to evaluate the effect of shock absorber on vehicle limits. At the beginning of the thesis, shock absorber properties were described. Then computational model was created and manoeuvres for shock absorber behaviour were defined. Created mathematical model is based on quarter model of a car and excitation in form of road with a random profile is an essential part of the model. This model was used for evaluation of heave. After heave analysis, shock absorber behaviour during drive was investigated. Drive conditions were defined as set of handling manoeuvres. For the drive investigation, complete multibody virtual model of racing car was used. Based on drive investigation analysis, optimal damping characteristics for each manoeuvre were found. Furthermore, each optimal characteristic was compared for different manoeuvres. Obtained results were compared. As a conclusion, compromise damping characteristic was suggested with the aim to fit the combination of all defined drive conditions. Final part of the thesis was aimed at validation of the computational model. Data measured during real drive were used as an input for this validation.
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Kinematics analysis of race car suspension
Jurka, Adam ; Blaťák, Ondřej (referee) ; Hejtmánek, Petr (advisor)
This bachelor thesis is aimed on kinematic analysis of the race car suspension. In the first part of the thesis geometry parameters of suspension and their influence on driving behavior are explained. Additionally measuring methods of suspension geometry and their use in real life applications are described. Then kinematic points of the race car Peugeot 208 R2 are found and measured using 3D optical method. For better evaluation of measured data virtual model of each axle is created in Adams Car simulation software. After that kinematic analysis is performed. This analysis describes change of parameters in car suspension depending on wheel trajectory. As a conclusion results of the analysis are discussed. Moreover new methodology for better and more precise evaluation of car suspension analysis is introduced and described.
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Formula Student Anti Roll Bar System Design
Urban, Marek ; Janoušek, Michal (referee) ; Ramík, Pavel (advisor)
This bachelor’s thesis is focused on design of rear anti roll bar system of single-seated Formula student car. It is a concept with torsional bar and third damper used for example in Formula 1. Design is partially inspired by topology optimization. The emphasis is on optimization using finite element method to achieve desired stiffness at low weight. Optimization is done in series of static analysis iterations of individual parts and of the whole system in several driving states. Design of front anti roll bar system with adjustable blades is made along with front third rocker system.
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Comparing heart frequency between driver a co-driver during super-stage's in rally
Pavlát, Martin ; Dvorský, Jaroslav (advisor) ; Límová, Lucie (referee)
Title of bachelor thesis: Comparing heart frequency between driver a co-driver during super-stage's in rally Author: Martin Pavlát Supervisor of bachelor thesis: PhDr. Jaroslav Dvorský Ph.D. Objective: Measure and compare heart frequency between driver a co-driver during super-stages's in one of Czech Championship rally race. Methodology: For set up my goals I use two heart rage monitor's. One for pilot and for co-pilot. And I messuare their heart frequency during one of the rally race. For specification my conclusion's I use questionary for both of them. This help me to found the right answers. Results: As I expected driver's heart frequency was much higher in every super-stage from begining to finish and it was more stabile than co-driver's heart frequency. Co-driver heart frequency was high especially befor and after start to super-stage. His heart frequency was also more unstable. Keywords: Race car, rally, heart frequency, aerobic brimm.
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