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Wyszukujesz frazę "Voženilek, R." wg kryterium: Autor


Wyświetlanie 1-5 z 5
Tytuł:
Action of force in steering mechanisms of vehicles in an experimental laboratory establishment
Autorzy:
Brabec, P.
Maly, M.
Voženilek, R.
Powiązania:
https://bibliotekanauki.pl/articles/242204.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
steer by wire
experimental laboratory establishment
vehicle axle
Opis:
The safe and stable control ofa vehicle undoubtedly belongs to one of the most important requirements that relate to the vehicle 's design and operation. Consequently, in the near future, so called steer-by-wire systems could become the next stage in the control system development. A number of new, modern vehicles presented by car makers at important car shows definitely show how topical the issue is. If we want to create a design for this steering system, we have to know the action offorce very well. An experimental laboratory establishment for measuring and optimizing the steering system of vehicles was developed in our centre. The testing equipment is made of aluminium sections enabling the equipment to be quickly adapted to various vehicles ' axles and tyres. An exchangeable mat located under a tyre enables the system to create behaviour simulation for various surfaces with a different coefficient of adhesion. A sliding way assisted by a hydraulic jack under a tyre allows a change in axle load for example in accordance with the vehicle 's occupancy. A force sensor will be positioned between the jack and the mat to monitor the load adjustment. The testing stand design enables us to determine responses and behaviour of the system including tyres.The safe and stable control ofa vehicle undoubtedly belongs to one of the most important requirements that relate to the vehicle 's design and operation. Consequently, in the near future, so called steer-by-wire systems could become the next stage in the control system development. A number of new, modern vehicles presented by car makers at important car shows definitely show how topical the issue is. If we want to create a design for this steering system, we have to know the action offorce very well. An experimental laboratory establishment for measuring and optimizing the steering system of vehicles was developed in our centre. The testing equipment is made of aluminium sections enabling the equipment to be quickly adapted to various vehicles ' axles and tyres. An exchangeable mat located under a tyre enables the system to create behaviour simulation for various surfaces with a different coefficient of adhesion. A sliding way assisted by a hydraulic jack under a tyre allows a change in axle load for example in accordance with the vehicle 's occupancy. A force sensor will be positioned between the jack and the mat to monitor the load adjustment. The testing stand design enables us to determine responses and behaviour of the system including tyres.
Źródło:
Journal of KONES; 2009, 16, 3; 55-62
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of model for testing of driving properties
Autorzy:
Brabec, P.
Maly, M.
Vozenilek, R.
Powiązania:
https://bibliotekanauki.pl/articles/243366.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
4WS
Four-Wheel Steering
Scale car model
Opis:
Technical University of Liberec prepares a functional car model with a four-wheel steering in a reduced scale (1:5). For years, reduced scale models have been a valuable tool (especially in the aircraft and ship industry) for analyses of properties and experimenting. Consequently, experiments, which would be otherwise unrealistic, can be made, the system functionality can be verified and the impact of slight changes and design modifications can be analysed. All of this within a relatively short period of time and at low costs. The paper presents the application of a reduced scale car model for the 4WS (Four-Wheel Steering) system development and practical assignment necessary for set up. Also shows the use of individual components for functional implementation of this system. The 4WS system pursues the target of enhanced overtaking stability, elimination of positional variances towards its vertical axis, lower sensitivity to side wind, neutral cornering behaviour etc., thus higher active safety. On the basis of results of driving tests of the scale model and after evaluation of parameters of steering behaviour and driving stability, the computer simulation model of the vehicle could be refined. The reduced scale vehicle model, equipped with the respective sensors of quantities and actuating units, allows carrying out driving tests under laboratory conditions, verification and possible optimisation of algorithms for the control of direction steering of the model is presented in the paper.
Źródło:
Journal of KONES; 2007, 14, 3; 109-115
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Test VDA ISO TR3888 on the testing bench for steer by wire system
Autorzy:
Voženilek, R.
Brabec, P.
Maly, M.
Powiązania:
https://bibliotekanauki.pl/articles/246243.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
steer by wire
experimental laboratory establishment
vehicle axle
Opis:
The Technical University of Liberec, Department of Vehicles and Engines, has developed a design of a testing bench which would enable the testing of directional control systems. The objective of the newly designed equipment is to incorporate a real tyre as well as aflexible mounting of the axle components into the tested system. Future of car s will be connected with systems of type steer by wire. This system need to be testing on the testing bench before real test in the car. One method for assessing can be investigation control deviation during test VDA ISO TR3888. The paper will describe measurement of the real car with conventional directional control during test VDA ISO TR3888 and simulation of the system steer by wire on the testing bench. The experimental steer by wire system forms hydraulic circuit with two double-acting hydraulic cylinders with a unilateral piston rod and two proportional valves Parker D1FP. Every wheel front of axle is control alone. The PID regulators were usedfor control of the positioning action. In particular, the testing bench for the testing of steering at zero angular speed of wheels, VDA ISO TR 3888 tests on the testing bench are presented in the paper.
Źródło:
Journal of KONES; 2010, 17, 4; 561-565
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of mechanical losses in the combustion engines
Autorzy:
Drab, O.
Voženilek, R.
Beroun, S.
Powiązania:
https://bibliotekanauki.pl/articles/243939.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engine
measurement of mechanical losses
Opis:
The development of a new combustion engines is connected with endeavour for escalation of the total efficiency. Escalation of the total efficiency can be: minimization of the mechanical losses in the combustion engines or minimization of the unsuitable equipment capacity of accessories. Now research and development programs of a manufacturer of the combustion engines search effectual equipment and method for this escalation of the total efficiency. The escalation of the total efficiency is important for a minimization fuel consumption and consequently for lower emissions. Turn of the combustion engines is used method for measurement of mechanical losses very often. The paper will show choice of the measurement results on the testing bench. The Technical University of Liberec, Department of Vehicles and Engines, has developed a design of a testing bench which would enable the measuring mechanical losses of the combustion engines for different temperatures of cooling water and engine lubrication oil. Each medium (lubrication oil and cooling water) have own circle with automatic temperature regulation. The testing bench has automatic system for change revolution and automatic system for measurement: torque, revolution, temperatures and pressures. The asynchronous motor (company SIEI, type MA 133 K - 62 with power 28 kWI 6000 l/min) is used for drive of combustion engine in the testing bench.
Źródło:
Journal of KONES; 2010, 17, 3; 63-67
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydraulic circuit control of a steer by wire system
Autorzy:
Voženilek, R.
Maly, M.
Brabec, P.
Powiązania:
https://bibliotekanauki.pl/articles/245341.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
steer by wire
hydraulic circuit
control
Opis:
The future of cars will be connected with "by-wire" systems. The Technical University of Liberec, Department of vehicles and Engines has developed a design of testing equipment for directional control system testing. The objective of the newly designed equipment is to incorporate a wheel with a real tire and a flexible mounting of axle components. The paper describes properties and control of the hydraulic circuit consisting of two double-acting engines with a unilateral piston rod and two proportional valves (Parker D1FP). Each of the front axle wheels is controlled separately. The paper illustrates relationships andpotential of steer-by-wire systems at the experimental equipment. The safe and easy control of a vehicle undoubtedly poses significant requirements. Satisfying them and improving the design to enhance the vehicle's stability have always belonged to the primary objectives of designer s. Consequently, the chassis characteristics, the mechanical features of wheel suspensions, the quality of air suspensions, but also speed control (including brakes) and the vehicle 's directional control have always been emphasised. The objective of the paper was to design a steer-by-wire directional control mechanism with a suitable arrangement. The comparison focuses on various design options to arrange the action members (actuators) of this mechanism.
Źródło:
Journal of KONES; 2009, 16, 4; 477-483
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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