Wyniki wyszukiwania - BazTech

1

Evaluation of a conceptual vehicle steering system for independent wheel control.

Buchalik R.

Zeszyty Naukowe. Transport / Politechnika Śląska

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2017

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z. 94

19--26

EN

This paper presents a brief description of an unconventional steering system involving electronic stability control and its influence on vehicle motion. The proposed configuration enables individual changes in steering angle for each single wheel, in contrast to the mechanical linkage solution. An analysis of vehicle behaviour during emergency braking on a heterogeneous surface is conducted, especially with regard to the undesirable rotation of the vehicle body. The benefits of using this active steering system, implemented in the steer-bywire mode, are characterized, while the problems for further consideration and the potential benefits of such a solution are described.

2

Project of mechatronic steering system

Skarka W., Glinka M., Janecki K., Krol A., Kurlanc M., Stafiński M., Porc M., Zaręba D.

Zeszyty Naukowe Instytutu Pojazdów / Politechnika Warszawska

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2015

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z. 3/103

115--122

EN

Mechatronic control (steer-by-wire) solutions are becoming more and more popular in comparison with conventional mechanisms. The main goal of the project was to propose steer-by-wire control for "Bytel' car manufactured on Institute of Fundamentals of Machinery Design on Faculty of Mechanical Engineering on Silesian University of Technology. Vehicle had been created to take part in Shell Eco- marathon contest in "Urban car" category. Because of the need to perform the experiment before creating the actual system in project was done a test stand which allows to perform required tests, through which it is possible to test functioning of mechatronic steering.

PL

Mechatroniczne układy sterowania (steer-by-wire) stają się coraz popularniejszą alternatywą dla układów konwencjonalnych. Głównym celem projektu było zaprojektowanie mechatronicznego układu sterowania do pojazdu "Bytel" wykonanego na Instytucie Podstaw Konstrukcji Maszyn wydziału Mechaniczno Technologicznego Politechniki Śląskiej. Pojazd został stworzony do udziału w zawodach Shell Eco- marathon w kategorii "Urban car'. Ze względu na konieczność wykonania eksperymentu przed utworzeniem rzeczywistego systemu w ramach projektu zostało wykonane stanowisko badawcze umożliwiające przeprowadzenie wymaganych badań, dzięki którym możliwe jest przetestowanie funkcjonowania mechatronicznego układu kierowniczego.

3

Test VDA ISO TR3888 on the testing bench for steer by wire system

Voženilek R., Brabec P., Maly M.

Journal of KONES

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2010

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Vol. 17, No. 4

561-565

EN

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.

4

Hydraulic circuit control of a steer by wire system

Voženilek R., Maly M., Brabec P.

Journal of KONES

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2009

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Vol. 16, No. 4

477-483

EN

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.

5

Action of force in steering mechanisms of vehicles in an experimental laboratory establishment

Brabec P., Maly M., Voženilek R.

Journal of KONES

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2009

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Vol. 16, No. 3

55-62

EN

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.