IJREI- Vibration Analysis and Response Characteristics of a Half Car Model Subjected to different Sinusoidal Road Excitation (original) (raw)
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The displacement response of different masses of half car model. The analysis has been done for different car models also to see the dynamic response of the driver body coupled with the seat of a vehicle. It has been assumed the driver body is rigidly coupled with seat of the vehicle. The vehicle has been modeled for two D.O.F, in two D.O.F Half car model two motion (Pitch and Bounce) have been considered. The response of the vehicle has been obtained for different velocities and different amplitudes sinusoidal bump excitation.
Vibration Response and Chacreteristics of a Different Car Models
The displacement response of different masses of half car model. The analysis has been done for different car models also to see the dynamic response of the driver body coupled with the seat of a vehicle. It has been assumed the driver body is rigidly coupled with seat of the vehicle. The vehicle has been modeled for two D.O.F, in two D.O.F Half car model two motion (Pitch and Bounce) have been considered. The response of the vehicle has been obtained for different velocities and different amplitudes sinusoidal bump excitation.
vibrational analysis of half car model
ARTICLE INFO Many researchers worked on root mean square (RMS) responses to acceleration input for four state variables. Wide research had conducted on Half-car2-DOF (degree of freedom) models. Researchers applied nonlinear MIMO system and input-output feedback linearization method for control purpose. Review show that wide research had conducted on PID controller controller. Researchers developed half car model through bond graph.
Vibrationanal Analysis of Half Car Model
ARTICLE INFO Many researchers worked on root mean square (RMS) responses to acceleration input for four state variables. Wide research had conducted on Half-car2-DOF (degree of freedom) models. Researchers applied nonlinear MIMO system and input-output feedback linearization method for control purpose. Review show that wide research had conducted on PID controller controller. Researchers developed half car model through bond graph.
Mathematical Modelling and Simulation of a Simple Quarter Car Vibration Model
A vehicle suspension system is required to improve ride comfort and road handling. In current article it is simulated and analyzed the handling and ride performance of a vehicle with passive suspension system, quarter car model with two degree of freedom. Since, the equations of the system can be solved mathematically a scheme in Matlab Simulink and also in state space has been developed that allows analyzing the behavior of the suspension. The scheme that was created in Matlab Simulink, can be introduced excitation signals, this case a step signal.
Modeling the Effect of Road Excitation on Vehicle Suspension System
2020
The vehicle suspension system serve a dual purpose – to provide passenger comfort and good road holding. In the design of a vehicle suspension system, these two contradictory criteria must be balanced out. Road irregularities are also a major source of anxiety amongst drivers and passengers alike. This research was undertaken to investigate the effect road irregularities will have on the vehicle structure especially the suspension system. In this study, the responses of different linear vehicle models are studied for step road input. The mathematical models considered are: a two degrees-of-freedom system (quarter car model) and a four degrees-of-freedom system (half car model). The equations of motion for both models were obtained using Newton’s method. These models are analysed using SIMULINK/Matlab. Different response parameters such as the acceleration of the vehicle body and the travel of the suspension are investigated for a passive suspension system. The responses of the vehic...
Vertical Vibrations of the Vehicle Excited by Ride Test
Advances in Industrial Machines and Mechanisms, Lecture Notes in Mechanical Engineering, 2021
The influence of a rough road surface on vehicle vertical vibrations and on the driver and passengers is an important research among automotive manufacturers. ISO international standard defines the terminology of vehicle dynamics and roadholding ability. In addition, ISO international standard proposes the test procedures for steady-state circular driving behavior and lateral transient response characteristics against step steering input, sinusoidal steering input, random steering input, and braking in a turn. The standardized test procedure of a double-lane-change test as a severe lane-change maneuver is proposed. In order to estimate the influence of vertical vibration on seated human body, the apparent mass of the human body is evaluated by mechanical lumped models. In this research, a mechanical equivalent model has been developed to characterize the response of the vehicle excited by road profiles. The mechanical equivalent model offers a quantitative evaluation of accelerations of vehicle along vertical axis in terms of natural frequencies and dissipative properties of vehicle. In order to calibrate the mathematical model, an experimental design has been developed by the ride test.
Quarter Car Model to Evaluate Behaviour Under Road and Body Excitation
Journal of KONES, 2017
The paper presents a quarter car model two degrees of freedom (wheel and body), with vertical guiding system, the model being equipped with suspension stroke limiters and with excitation by wheel and/or by body. The model reproduces elastic and damping characteristics of wheel and of rebound and compression stopper bumpers, the spring elastic characteristic and the shock absorber damping characteristic on rebound and compression, function piston speed. The road profile is generated with simple or summation of harmonic functions, or by reproducing real roads. The forces acting on full vehicle body e.g. aerodynamic and inertial forces are reproduced in the proposed quarter model by vertical forces reduced to the analysed quarter part. Thus, the model can be used for evaluation the vertical and horizontal stability at acceleration, deceleration, pitch and roll, at aerial forces, the body ground clearance and the comfort. The model can evaluate the influence of the damping and elastic c...
2015
The objective of the paper is to investigate the dynamics of a quarter-car model with passive suspension and considering the driver-seat. The model is a 3 DOF one excited by the irregularities of the road pavement. The model dynamics are studied in terms of the frequency response of the driver using its transmissibility. The paper presents new technical terms used to assess the suspension parameters which are the accumulated and mean transmissibility. The driver frequency response is studied for road pavement of irregularities having harmonic components of frequencies up to 10 Hz. The natural frequencies of the system are calculated and the driver transmissibility is evaluated for suspension parameters in the range 2.85 to 11.4 kN/m for stiffness and 0.5 to 8 kNs/m for damping coefficient.