Temat: system analysis - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Stiffness characteristics of main bearings foundation of marine engine
Autorzy:: Murawski, L.
Powiązania:: https://bibliotekanauki.pl/articles/247486.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: dynamic stiffness of main engine bearings
shaft line alignment
crankshaft springing
marine propulsion system numerical analysis
Opis:: During shaftline alignment and crankshaft springing analyses, knowledge of stiffness of radial bearings is essential. Dynamic stiffness's characteristics of marine main body are difficult to estimate because of lack of available documentation and complicated shape of the body. In the literature, there is a lack of the detailed data on the stiffness of the crankshaft foundation in the frame of marine main engine. Those parameters are crucial for the shaft line alignment analysis as well as for the analysis of interactions between the shaft line and the crankshaft. Especially for the high power engines, the correct model of the boundary conditions plays a key role during the analysis. The paper presents the methodology of the characteristics determination of the marine engine’s body as well as the example of computations for a MAN B&W K98MC type engine mounted on a ~3000 TEU container ship. The model of main engine body is relatively big – it contains over 800 thousand degree of freedom. The elasticity of ship hull has been estimated and taken into account during analysis. It has been found, that static stiffness parameters recommended by the producer for the shaft line alignment are evaluated correctly, however they represent only the flexibility of the engine’s body, not taking into account the flexibility of the ship’s hull. What is more, the dynamic magnification of vibration amplitudes is not taken into account.
Źródło:: Journal of KONES; 2016, 23, 1; 239-246
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analysis and evaluation of application of car modular systems in polish road transport
Autorzy:: Muślewski, Ł.
Lewalski, M.
Woropay, M.
Powiązania:: https://bibliotekanauki.pl/articles/246606.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport system
car modular system
SWOT analysis
efficiency
Opis:: This study presents an analysis and evaluation of application of European Car Modular Systems in the Polish road transport. Those systems and respective terminology have been analysed and classified. Application of such systems in other countries of the European Union has been described. SWAT analysis has also been carried out in order to enable the most optimal choice of modular system in freight transport to match the condition and characteristics of the Polish road infrastructure. The systems have also been analysed in terms of efficiency and the analysis was performed on the basis of a selected research object – a transport company. An analysis of costs and estimated profits from transport services to be provided by those systems has been carried out on the basis of the research object in comparison with costs borne by the considered company with currently used transport means. This study shows that taking into consideration the results of analyses, safety aspect, road infrastructure and energy efficiency of the vehicles it was found that the proposed oversized vehicles could be implemented to be used on the Polish roads. The analyses and tests performed for a transport logistic company discussed in this article have demonstrated that the proposed modular systems will undoubtedly allow reducing significantly the costs of transport services by increasing load capacity of vehicles.
Źródło:: Journal of KONES; 2015, 22, 4; 211-220
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: A computational fluid flow analysis of a disc valve system
Autorzy:: Czop, P.
Śliwa, P.
Gniłka, J.
Gąsiorek, D.
Wszołek, G.
Powiązania:: https://bibliotekanauki.pl/articles/244640.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: valve system
computational fluid flow analysis
simulation
Opis:: Noise concerns in shock absorbers can be divided into two categories. The first is fluid flow noise, or “swish noise”, caused by the oil being forced through openings in the valves. The type and temperature of the oil, its velocity and the orifice geometry all have an effect on this. In addition, the structural design of the shock absorber shell may either reduce or amplify the noise. The second type of shock absorber noise is often described as regular operational noise or “chuckle noise”. It can be observed in vehicles during low-displacement, higher-frequency events, such as driving over a slightly rough road. This effect measurable as a force discontinuity into the vehicle and can come from a number of sources in the shock absorber, e.g. hydraulic transitions. It is often traceable to the valve discs closing and opening, but can also be caused by cavitation/aeration in the oil and air being pulled through the valves. The work on noise improvement reported in this paper has been started using conventional shock absorbers to be extended and will cover in the future variable damping shock systems as well. The paper gives an overview about the configurations of a typical valve system including three basic regimes of operation, which correspond to the amount of oil flowing through a valve cavity. The aim of this work was to propose a finite element fluid flow model, which can be used in order to reduce the velocity of fluid flow through a cavity of a shock absorber valve. High flow velocity can cause high-content frequency vibrations and, in turn, audible noise. The model will be used for initial screening of new valve concepts and on the other hand to improve the currently use ones.
Źródło:: Journal of KONES; 2011, 18, 1; 117-122
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Application of principal component analysis for optimization of a system operation assessment criteria set
Autorzy:: Muślewski, Ł.
Knopik, L.
Powiązania:: https://bibliotekanauki.pl/articles/247903.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: quality
criteria
transport system
analysis
canonical correlations
optimization
Opis:: The analysis of results of experimental tests and a literature survey of the issue reveal that the subject matter connected with determination of the optimal number of a given transportation system operation assessment criteria has a direct influence on the result of the considered assessment. The analysis was made within the research on operation quality of a selected transportation system. In order to optimize the analysed system assessment criteria, a theoretical description has been made and an example of canonical correlations application has been presented. Analysis of canonical correlations involves determination of linear combination parameters of the studied sets so that the obtained correlation coefficient will have maximal value. In the successive step, the next pair of linear combination are not correlated with the combinations determined in the first step. The determined correlations can measure the power of relation between two sets of variables and are useful in the process of choosing significant criteria for a given research object operation quality assessment.
Źródło:: Journal of KONES; 2013, 20, 4; 307-312
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Vibrations resonance estimation in marine structures
Autorzy:: Murawski, L.
Powiązania:: https://bibliotekanauki.pl/articles/247863.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: vibration
dynamic analysis
marine structures
propulsion system
crankshaft
resonance
Opis:: Dynamic analyses of marine structures are one of the most important during design process as well as during exploitation. Typically, two parts of vibrations calculations are performed. Firstly, natural vibrations frequencies and modes are determined. Forced vibrations analysis is the second step of calculations. Natural vibrations give us information about possibility (e.g. at which main engine speed) of dangerous vibrations amplitudes (resonances threat). Exact values of vibrations amplitudes are results of forced vibrations analysis. Confidence level (error value) of forced vibration calculations is much lower in comparison to uncertainty of natural vibration analysis. What is more, form engineering practice point of view, natural vibrations frequencies estimation (resonance avoidance) is the most important during dynamic analysis of marine structures with propulsion systems. In the paper some examples of dynamic characteristics estimation and their changing methods (possibility) was presented. Utility of relatively simple models, with low degree of freedom number, was discussed. Modelling methods depending on the analysis target of marine slow-speed crankshafts was presented. Advantages and disadvantages of subcritical and supercritical design of marine propulsion system were discussed. An example of propulsion system natural torsional vibrations simplified analysis was presented. Location of the main torsional resonance is one of the most important decisions during design process of the marine propulsion system. Methods of fast and easy estimation as well as changing possibility of natural vibrations frequencies of marine structures is the main objective of presented paper.
Źródło:: Journal of KONES; 2014, 21, 1; 175-182
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Application of principal component analysis for optimization of a system operation assessment criteria set
Autorzy:: Muślewski, Ł.
Knopik, L.
Powiązania:: https://bibliotekanauki.pl/articles/242963.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: quality
criteria
transport system
analysis of main components
optimization
Opis:: The analysis of results of experimental tests and a literature survey on the issue reveal that the subject matter connected with determination of the optimal number of a given transportation system operation assessment criteria has a direct influence on the result of the considered assessment. Whole study has been made on the basis of the analysis of data obtained from tests performed in a real municipal transportation system, providing transport tasks in a 400 thousand urban agglomeration. On the basis of the tests, there was determined a set of sixteen criteria for the system operation assessment, depending on preferences of drivers, passengers, workers of the system providing vehicles with serviceability and the last group of results is a final assessment. The research involved tests of significance for correlation coefficients between the assessment criteria. The method of main factors involving analysis of a linear transformation of existing vector of variables X into Y has been used to study the task dimensioning. Proper values, providing basis for determination of a new space correspond to coordinates of the newly created vector Y. On this basis, the dimension of the criteria and their significance space has been concluded. The determined criteria have been accepted for the development of a resultant model for assessment of a transportation system operation quality.
Źródło:: Journal of KONES; 2012, 19, 4; 481-486
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Analysis of civil engineering structures vibroisolation effectiveness
Autorzy:: Bednarz, J.
Targosz, J.
Powiązania:: https://bibliotekanauki.pl/articles/241751.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: vibration analysis
discrete-continuous model of vibration isolation system
Opis:: A properly designed and manufactured vibration isolation system of railroads and civil engineering structures has a decisive influence on the reduction of vibrations caused by crossing trains, trams and subway transferred to residential buildings This article presents an overview of current vibration isolation systems of railroads and civil engineering structures. Based on the effectiveness of the protection of residential and industrial buildings from vibrations the ranking of vibration isolation systems was proposed. The article also attempts to assess the effectiveness of vibration isolation systems currently used in rail trails. For this purpose, a discrete-continuous model of vibration isolation system of railway and tramway rails was build. For this model, dynamic analysis was carried out. Performed analysis allowed determining range of the natural frequency of vibration isolation system. The results of dynamic analysis allow pitching shift the natural frequency of the system under consideration from the frequency of excitation, which in turn is a fundamental condition for the proper operation of the vibration isolation. As part of work on a physical model of vibration isolation system there was also developed one-level crossings of roads and railroads. The work was carried out in a research project 4875/B/TO2/2010/38 financed by Ministry of Science and Higher Education.
Źródło:: Journal of KONES; 2012, 19, 4; 33-41
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The possibility of diagnosis EGR systems defects by vibration analysis
Autorzy:: Kaźmierczak, A.
Wróbel, R.
Powiązania:: https://bibliotekanauki.pl/articles/244781.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: EGR system
fast Fourier transform
automotive diagnosis
vibroacustic analysis
Opis:: The Exhaust Gas Recirculation is a popular system of recirculation of the automotive vehicle emission. The principle of working depends on the forcing in the part of outlet gas to the combustion chamber. Majority of the users of automotive vehicles with EGR systems claim that system has negative effect on the performance of the car. Nonetheless, that opinion is subjective, because the generally available research on the subject does not exist. However, EGR system, as the most of automotive vehicle is being subjected to physic's rules - it uses up. The polluted flowing valve of circuit has an influence on stability of engine's work, and what follows on a performance of a car. The authors present a new in - vitro way of diagnosis in automotive vehicle, which depend on detection and measure of vibroacustic vibrations of the diesel engine. It seems that EGR circuit that does not work properly should not have an influence on vibrations generated by an engine. However, authors indicate that this statement is wrong. EGR system has an influence on engine's vibration, what was described in the article. On that way, detection of vibrations must be accomplished with high quality diagnostic systems. Therefore, vibrometric laser scanner Polytec had been used. To achieve full diagnostic results multidimensional vibration's function has been researched, where the torque moment has been used as an extra parameter. Measured vibrations were subjected to digital signal processing like windowing, fast Fourier transform, filtration by finite impulse response. The results of measure and processing perform in form of 3D plots, which indulge in speed estimate of the usefulness of presented method. Moreover authors presents principle of working EGRs' systems of different generations and its evolution.
Źródło:: Journal of KONES; 2008, 15, 4; 217-225
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Influence of environmental, ergonomic factors and properties of operators on the reliability of ships propulsion systems
Autorzy:: Frąckowiak, W.
Powiązania:: https://bibliotekanauki.pl/articles/247900.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: propulsion system
operator
reliability
analysis
operator functions
Performance Shaping Factor
Opis:: Analyzing the systems in terms of reliability, we often treat them as the technical objects only, omitting human interaction or assuming that operator has constant characteristics. This significantly distorts the results obtained in this way, since human is a part of the system with special properties that can change together with the predisposition of the operator and the conditions under which he operates. These attributes may have a major influence on the reliability of the systems. Therefore, analysis of systems reliability should include a reliability of operator and its properties. In this paper presented the antropotechnical reliability structure based on selected installation, which is a part of ships propulsion system. Also operator’s functions were defined and the analysis of human reliability, taking into account various properties of the operator and the external conditions, were performed. Then, there is assessed the influence of operator and environmental factors on the value of the entire system reliability. The study used the reliability data of the container ship propulsion system equipped with low-speed piston engine, fixed pitch propeller and auxiliary installations. These data were obtained from studies of expert judgments (Brandowski A., Frąckowiak W. et al.) in the years 2007–2009. For HRA (human reliability analysis), HEART technique (Human Error Assessment and Reduction Technique) was used, together with the human unreliability values and correction factors developed by the authors of this method. Study results illustrate influence of environmental, ergonomic factors and the properties of the operator on the reliability of the antropotechnical systems. The studies were subjected exemplification on fuel treatment installation as a part of ships propulsion systems.
Źródło:: Journal of KONES; 2012, 19, 2; 145-151
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Application of multibody simulation for semitrailer optimization
Autorzy:: Korta, J.
Martowicz, A.
Gallina, A.
Uhl, T.
Powiązania:: https://bibliotekanauki.pl/articles/247963.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: multibody dynamic system
response surface
design of experiment
sensitivity analysis
Opis:: This paper presents an approach of optimization of a truck semitrailer suspension system, with utilization of multibody model; its purpose was to find the best values of operational parameters: stiffness and damping factors, in order to minimize the disadvantageous influence of force distribution in the high risk areas, where preceding strength analysis has pointed out dangerous load values. The model contains elements of two different types: flexible and rigid bodies, in purpose of increasing the accuracy level of conducted numerical calculations. A number of simulations with different parameters and under different load cases have been carried out, combined with a parametric and structural sensitivity analysis, what has enabled an estimation of individual factors influencing particular forces that have been the objectives of optimization procedure. The stiffness and damping coefficients of the construction suspension system have been adjusted by applying metamodeling techniques. Basing on the chosen design of experiment results, this procedure allows for an approximation of the behaviour of the analysed construction in the whole design space. In this process, two different approaches have been used: Kriging and polynomial regression, and both have been compared to the simulations results. Finally, using a desirability function, the most optimal solution has been found.
Źródło:: Journal of KONES; 2012, 19, 1; 171-182
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Preliminary numerical analysis of selected phenomena occurring in a rail fastening system
Autorzy:: Szurgott, P.
Bernyś, K.
Powiązania:: https://bibliotekanauki.pl/articles/242992.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: rail pad
fastening system
moving load
numerical analysis
hyperelastic material
Opis:: The results of numerical analysis of selected phenomena occurring in a rail fastening system were presented in the paper. The study is focused on assessment of the state of displacement and stresses in the rail pad subjected to a moving load. Two finite element models of the considered system were developed. The first one included elementary track segment corresponding to one sleeper. The second FE model consisted of several elementary segments. The number of the track segments was determined independently on the basis of dynamic analysis carried out using LS-DYNA computer code. Essential FE analyses were performed using MSC.Marc/Mentat software. FE model of the elementary segment included 600 mm length rail and a two-side shaped rail pad. The Mooney - Rivlin material model was applied for the polyurethane rail pad. The fastening systems were modelled using spring elements. The vertical and longitudinal spring elements were also applied for the ballast modelling. A case of moving load caused by single vertical force - one axle - was considered in the study. Methodology of moving load simulation in the MSC.Marc software was proposed. The obtained results allowed assessing the total deflection of the rail pad, the state of stress, the load distribution on respective sleepers. Moreover, they gave information about the behaviour of the rail pad under moving load in context of static test described in respective standards.
Źródło:: Journal of KONES; 2012, 19, 4; 607-614
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: The possibilities of conducting scenario analyses of a sustainable development of the transport system using the emitransys model
Autorzy:: Jacyna-Gołda, I.
Gołębiowski, P.
Jachimowski, R.
Kłodawski, M.
Lewczuk, K.
Izdebski, M.
Szczepański, E.
Powiązania:: https://bibliotekanauki.pl/articles/243760.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: scenario analysis
scenario procedure
transport ecology
EMITRANSYS
proecological transport system
Opis:: The article presents selected aspects of shaping pro ecological transport system. Correct, socially responsible, economically reasonable and far-sighted allocation of resources is one of the basic tools of sustainable development shaping. In the case when this concept in a narrower sense refers to shaping the national transport system one can distinguish the general problem: how to invest financial resources in the development of the transport system and how to manage this system in order to one can say about it as "sustainable". The article presents the principles of creating scenario analyses, discusses the procedure and elements of an algorithm for the development of scenarios of the sustainable transport system. The procedure for conducting scenario consists of three stages of research. The analyses were conducted by the use of EMITRANSYS model. The EMITRANSYS model was developed in Visum. Its main elements are the network model, demand model, integrated database and a set of scenarios of an analysis of transport system development. The simulation model EMITRANSYS was developed under the PBS1 project "Shaping of the pro ecological transport system” financed by the National Centre of Science and Development. The project was realized within the consortium consisting of the Faculty of Transport of The Warsaw University of Technology and the Faculty of Machines and Transport of The Poznan University of Technology in the years 2012-2014.
Źródło:: Journal of KONES; 2016, 23, 4; 151-158
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Numerical investigations of terrain vehicle tire subjected to blast wave
Autorzy:: Baranowski, P.
Małachowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/243723.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: blast wave
finite element analysis
SPH
JWL
tire
vehicle suspension system
vehicle suspension
Opis:: In this paper a numerical model of a terrain vehicle suspension system development process is presented. In the performed studies the suspension system with and without a simplified motor-car body was taken into consideration. Geometry of the tire, wheel and system elements were achieved using reverse engineering technology. Moreover, with the assistance of a microscope and an X-ray device it was possible to achieve the exact tire cords pattern, which in the next stages was implemented into the FE model. Subsequently, numerical simulations of both cases were performed simulating the TNT explosion under a wheel. The non-linear dynamic analyses were performed using the LS-DYNA code. To solve both presented cases the explicit central difference scheme with modified time integration of the equation of motion was implemented. Computations of blast wave propagation were carried out with the Smooth Particle Hydrodynamics (SPH) method with Jones Wilkins Lee (JWL) equation of state defining the explosive material. Obtained results have shown different suspension system elements damage and tire destruction characteristic, which come from blast wave reflection of the motor-car body surface.
Źródło:: Journal of KONES; 2011, 18, 1; 23-30
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: A modular low- bed semi-trailer for transportation of machines and other heavy and big loads
Autorzy:: Koszałka, G.
Niewczas, A.
Kaczor, M.
Taratuta, L.
Głowacz, Ł.
Powiązania:: https://bibliotekanauki.pl/articles/245791.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: road transport
oversize and heavy loads
low-loader
steering system
strength analysis
FEM
Opis:: The paper presents the assumptions made and solutions used in a newly designed low-bed semi-trailer for the transportation of heavy and oversized loads, especially heavy self-propelled road machinery. During the design phase, special attention was paid to the versatility of the semi-trailer. The semi-trailer consists of 4 main modules: a hydraulic removable gooseneck allowing for coupling the semi-trailer to a tractor unit, an extendable low bed, a 2- axle bogie and a 3-axle bogie. The modules can be combined in different ways to create different configurations of the semi-trailer. Owing to that, the carrying capacity of the semi-trailer can be easily matched to the equipment carried. Depending on the current needs, the semi-trailer can have 2, 3 or 5 axles, a payload from 28 to 65 tons, and a length from 13.2 to 20.1 m. Wheeled and caterpillar vehicles can drive onto the lowbed from the front, after the gooseneck has been detached. The length and width of the bed can be adjusted within the range of 2 and 0.6 m, respectively. An important advantage of this semi-trailer is the fact that in a 2-axle configuration it meets the regulations for standard trailers and can be driven in public roads and carry normal loads without a special permission. Thanks to the fact that all its wheels are steered and controlled by a hydraulic steering system, the semi-trailer has very good manoeuvrability despite its long length. The semi-trailer meets rigorous safety demands – it is equipped with a braking system with ABS/EBS, an advanced load fixing system, marking and lighting systems and others. Research and development experiments performed during the design process, among others those concerning the steering system and optimization of the supporting structure of the semi-trailer using FEM analysis, are characterized in this paper.
Źródło:: Journal of KONES; 2013, 20, 3; 237-244
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Sensitivity analysis of steering system model
Autorzy:: Żardecki, D.
Powiązania:: https://bibliotekanauki.pl/articles/242406.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: car
steering system
piecewise linear model
simulation
sensitivity analysis
friction
freeplay
stick-slip
Opis:: The method of sensitivity analysis of mathematical model with strong non-linear characteristics is discussed in the paper. This model focuses on friction, as well as freeplay dynamics in a car steering system including stick-slip fenomena. Because of strong nonlinearities of the model, its sensitivity indexes can not be counted by classic sensitivity variation equations and classic mathematical analysis of smooth functions. Fortunately, nonlinear characteristics are described with using special piecewise - linear luz(...) and tar(...) projections. They have an original mathematical apparatus which secures parametrically made simplifications and enough regularity of the model (some details of analytical transformations are shown). Thanks to luz(...) and tar(...) projections the continuity of sensitivity indexes is secured but of course, the calculation of sensitivity indexes has to base on comparative simulation investigations. The paper presents example results of simulations of the steering system action (including stick-slip processes) for different values of friction as well as freeplay parameters (kinetic and static friction in king-pins, backlash in a steering gear). These simulations concern combined open road tests of a passenger car according to the ISO requirements (ISO 7401 - the ramp input on the steering wheel, then ISO 4138 - circular steady state motion, and finally the steering wheel released, all with a constant speed 80 km/h).
Źródło:: Journal of KONES; 2009, 16, 1; 571-581
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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