Dynamic Modelling of Axle Tramp in a Sport Type Car (original) (raw)
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Anais do IX Congresso Nacional de Engenharia Mecânica, 2016
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International Journal of Innovation and Scientific Research, 2014
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International Journal of Vehicle …, 2009
Handling and ride quality are affected by many factors, including high-frequency vibrations, body booming, body roll and pitch motion, vertical motion by the suspension system and frequency vibration transmitted from the road input excitations. This article focuses on the most significant vibration source that affects handling and ride quality, which is the suspension system. Passive suspension has been taken as the starting point of this work, in which we discuss the model in context. Semi-active suspension systems are introduced with the aim of exploring the performance of the system compared with passive suspension. Several control policies of semi-active systems, namely, skyhook, ground-hook and hybrid controls, are presented. Their ride comfort, suspension displacement and roadholding performances are analysed and compared with passive systems. The analysis covers both transient and steady-state responses in the time domain and transmissibility response in the frequency domain. The results show that the hybrid control policy yields better comfort than a passive suspension, without reducing the road-holding quality or increasing the suspension displacement for a typical off-road vehicle. The hybrid control policy is also shown to provide a better compromise between comfort, road-holding and suspension displacement than the skyhook and ground-hook control policies Keywords: four-axle half-vehicles; groundhook; hybrid; off-road vehicles; passive suspension; ride comfort; semi-active control; skyhook; semi-active suspension; vehicle suspensions; vehicle vibration; suspension displacement; road-holding performance; hybrid control
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IOP Conference Series: Materials Science and Engineering, 2021
In this work, using a quarter-car model was adopted, the equations of motion were derived for a passive and then the sky-hook semi-active suspension systems. The derived differential equations, solved using the Dormand-Prince pair numerical formula, was then used to simulate values of displacements as affected by damping coefficients and the sky-hook constant. The simulated results showed that the maximum amplitude of the sprung mass, which is linked to ride discomfort, increases while those of unsprung masses, which affects the road holding ability, decreases with increasing depth of pothole. Furthermore, displacements for both sprung and unsprung masses varied directly with damping coefficient. Finally, as the sky-hook constant of the semi active system model increases, values of amplitudes of unsprung masses decreases while those of sprung masses increases. It was, thus, shown that the vertical displacements of vehicle bodies and wheels are dependent on the depth of potholes, dam...
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IOP Conference Series: Materials Science and Engineering, 2018
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Suspension system of an automobile not only supports the body of the vehicle, engine and passengers but also absorbs shocks arising from the roughness of the road. So, tremendous research carried out on vibrational analysis for active and passive suspension system. This paper includes review of vibrational analysis for active and passive suspension for linear and nonlinear system. Vibrational analysis usually carried out with quarter car, half car and full car model. Also uses various optimization techniques for optimum parameters for suspension system. KEYWORDS— Passive and active suspension system, Quarter, half car model, FFT analyser, PID controller, MATLAB. INTRODUCTION Conventionally Automobile suspension strategies have been a compromise among three contradictory criteria of road holding, rattle space requirements and ride comfort of passenger. The suspension arrangement need to take care of the vehicle handling parameters during vehicle moving over a terrain and be responsib...
Suspension system of an automobile not only supports the body of the vehicle, engine and passengers but also absorbs shocks arising from the roughness of the road. So, tremendous research carried out on vibrational analysis for active and passive suspension system. This paper includes review of vibrational analysis for active and passive suspension for linear and nonlinear system. Vibrational analysis usually carried out with quarter car, half car and full car model. Also uses various optimization techniques for optimum parameters for suspension system
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The aim of this paper is to introduce the mathematical modeling of a tire-vehicle suspension system for a quarter car model. This paper discusses the 2-DOF system as a quarter car model with base excitation. To study the system, first derive the dynamic equations of the vehicle model. The Laplace transform approach is selected with assumption that the displacement of the base is a half-sine wave. To analyse the responses, a interactive system MATLAB ® is used. The simulation results shows that a two degree-of-freedom system with appropriately chosen parameters can be an effective isolator of ground vibrations compared to a single degree-of-freedom system.
MODELİNG OF VEHICLE SUSPENSION SYSTEM
Araç süspansiyon sistemlerinin analizlerinin matlab programında kodlama yöntemiyle yapılarak gerekli analiz ve grafik değerleri elde edilmiş ve sonuçlara ulaşılmıştır.Süspansiyon çeşitleri ve detaylarıda bahsedilmiştir.