Vibration Response and Chacreteristics of a Different Car Models (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.
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.
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.
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.
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.
Ride dynamic behaviour of coupled human-vehicle vibratory model
International Journal of Human Factors Modelling and Simulation, 2014
In this paper a 17-degree of freedom (dof) human-seat system is developed using anthropomorphic modelling and the model is coupled with a 7-degree of freedom of a typical small passenger car to study the dynamic response of human driver due to vehicle vibrations. The coupled model is analysed by MATLAB simulation for ride dynamic behaviour of human driver under harmonic input excitation in the frequency range of 0-40 Hz. The ride behaviour in terms of vertical accelerations of different body segments of the human driver is compared for ride comfort using ISO-2631 standard. Further parametric analysis is carried out to improve the ride comfort of the human driver.
Study of the dynamic behaviour of a human driver coupled with a vehicle
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2014
In this paper a 15-degree-of-freedom human–seat vibratory model is developed using anthropomorphic modelling and the model is coupled with a typical seven-degree-of-freedom small passenger car to study the dynamic response of a human driver due to vehicle vibrations. The coupled model is analysed by MATLAB simulation for the ride dynamic behaviour of the human driver under a harmonic input excitation in the frequency range 0–40 Hz. The ride behaviours in terms of the vertical accelerations of different segments of the human driver are compared with respect to the ride comfort using the ISO 2631-1:1997 standard. Further, parametric analysis is carried out to improve the ride comfort of the human driver.
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.
Mathematical Modeling in Vehicle Ride Dynamics
Ride is considered to be one of the criteria for evaluating the performance of a vehicle. However, the evaluation of ride quality of a car varies from person to person. There are many mathematical models which are used to study vehicle ride dynamics. The development of electronics, sensors and actuators has enabled the use of control systems to enhance the ride quality of a vehicle. This work deals with some of the commonly used ride models viz. Quarter Car model, 2 Degree of Freedom (DoF) Half Car Model and 4 DoF Half Car Model. A complete analysis of these models from a designer's perspective, e.g., variation of suspension stiffness, damping coefficient etc. is being presented. The response of these models to random excitation is being studied. The above mentioned models are based on the rigid body assumption. They do not incorporate a tire model which takes into account the stiffness and damping properties of the tire. The Flexible Ring Tire model is being incorporated into the 4 DoF Half Car model and effect of tire flexibility on vehicle ride is being analyzed. A flexible 2 DoF model, which models the chassis as an Euler beam on springs is also analyzed and a comparison with the rigid 2 DoF model is being done. Semi-active suspensions enable the variation of suspension properties to improve vehicle ride quality. These kinds of systems are becoming popular with high end cars. A simulation of MR dampers (semi-active suspension) using Bouc-Wen Model has been incorporated into the quarter car model using PID controller.
Influence of the Damping System on the Vehicle Vibrations
Manufacturing Technology, 2019
The aim of the work was to evaluate the whole system of the springs of a passenger car. The influence of inflation and the type of tires on the acceleration of the various parts of the car (axle, steering wheel, driver's seat attachment, body shell and acceleration affecting the driver) was investigated. The types of shock absorbers and springs of the passenger car were also examined. The sensors used acceleration and pressure sensors between the wheel and the road using test stands. The benefits and reserves of the individual systems were compared, and in the systems with the cushioning rigidity, all the suspension setups were evaluated. The work was done experimentally in laboratory environment as well as in real operation.