scholarly journals Implementation and validation of a three degrees of freedom steering-system model in a full vehicle model

2018 ◽  
Vol 57 (1) ◽  
pp. 86-107 ◽  
Author(s):  
Jan Loof ◽  
Igo Besselink ◽  
Henk Nijmeijer
Keyword(s):  
Degrees Of Freedom ◽  
Steering System ◽  
System Model ◽  
Vehicle Model ◽  
Full Vehicle ◽  
Three Degrees Of Freedom

Vehicle Shimmy Modeling With Pacejka's Magic Formula and the Delayed Tire Model

2020 ◽  
Vol 15 (3) ◽  
Author(s):  
Tian Mi ◽  
Gabor Stepan ◽  
Denes Takacs ◽  
Nan Chen
Keyword(s):  
Degrees Of Freedom ◽  
Steering System ◽  
Tire Model ◽  
Magic Formula ◽  
Advantages And Disadvantages ◽  
Contact Models ◽  
Three Degrees Of Freedom

Abstract This paper investigates a three-degrees-of-freedom (DoF) shimmy model of vehicle front wheels with steering system and dependent suspension. The contact models of rigid ground and elastic tire are analyzed from the viewpoint of predicting shimmy. Pacejka's magic formula and the delayed tire model are compared by means of stability charts in various parameter domains. Conclusions are obtained regarding the advantages and disadvantages of the use of the delayed tire model.

Performance of Developed Driving Simulator With Full Vehicle Model of Multibody Dynamics

2001 ◽  
Author(s):  
Taichi Shiiba ◽  
Yoshihiro Suda
Keyword(s):  
Real Time ◽  
Multibody Dynamics ◽  
Degrees Of Freedom ◽  
Driving Simulator ◽  
Vehicle Model ◽  
Full Vehicle ◽  
Real Time Analysis ◽  
Motion System ◽  
Time Calculation ◽  
6 Degrees Of Freedom

Abstract In this paper, the authors propose to apply the full vehicle model of multibody dynamics to driving simulator with 6 degrees of freedom motion system. By this proposal, the characteristics of driving simulator become very similar to the actual automobiles. It becomes possible to predict the performance of vehicle dynamics and the riding comfort by feeling test without prototyping automobile. To realize real-time calculation that is necessary for driving simulator, the authors proposed approximated real-time analysis method. By this method, real-time vehicle analysis of 2 ms step time of numerical integration is achieved with 91 degrees of freedom vehicle model.

A non-linear vehicle dynamics model for accurate representation of suspension kinematics

2014 ◽  
Vol 229 (6) ◽  
pp. 1002-1014 ◽  
Author(s):  
Prashanth KR Vaddi ◽  
Cheruvu S Kumar
Keyword(s):  
Vehicle Dynamics ◽  
Degrees Of Freedom ◽  
Normal Force ◽  
Dynamics Model ◽  
Vehicle Model ◽  
Handling Performance ◽  
Suspension Spring ◽  
Full Vehicle ◽  
Non Linear ◽  
Dynamics Models

A non-linear full vehicle model for simulation of vehicle ride and handling performance is proposed. The model effectively estimates the suspension spring compressions, thus improving the accuracy of normal force calculations. This is achieved by developing models for suspension kinematics, which are then integrated with the commonly used 14 degrees of freedom vehicle dynamics models. This integrated model effectively estimates parameters like camber angles, toe angles and jacking forces, which are capable of significantly affecting the handling performance of the vehicle. The improvements in the accuracy of spring compressions help in simulating the effects of non-linear suspension elements, and the accuracy of handling simulation is enhanced by the improvements in normal force estimates. The model developed in Simulink is validated by comparing the results to that from ADAMS car.

Analysis on Vehicle On-Center Performance

2012 ◽  
Vol 482-484 ◽  
pp. 1302-1306
Author(s):  
Hai Bin Li ◽  
Peng Ji
Keyword(s):  
Dry Friction ◽  
High Speed ◽  
Steering System ◽  
System Model ◽  
Vehicle Model ◽  
Handling Performance ◽  
Set Up ◽  
High Speed Vehicle

On-center handling performance for high speed vehicle is becoming more and more concerned. Road feel is the most indexes to evaluate the on-center handling performance. Steering system is the key part of the whole vehicle to affect the performance, which include much nonlinearity: steer ratio, dry friction and stiffness etc. In this paper, steering system model is set up by ADAMS, and embed into the whole vehicle model to study the effects of these nonlinearities on on-center handling performance.

The Design and Performance Analysis of Multi-Axle Dynamic Steering System

2010 ◽  
Vol 29-32 ◽  
pp. 756-761
Author(s):  
Shu Feng Wang ◽  
Jun You Zhang
Keyword(s):  
High Speed ◽  
Low Cost ◽  
Steering System ◽  
Vehicle Model ◽  
Steering Angle ◽  
Dynamic Steering ◽  
Full Vehicle ◽  
Stability Performance ◽  
Steering Mechanism ◽  
And Performance

In order to improve vehicle steering performance, Multi-axle dynamic steering technology is put forward. Because of simple and low cost, the mechanical dynamic steering mechanism is suitable for heavy vehicle. In order to design ideal steering mechanism, the principle of dynamic steering mechanism was analyzed. Based on theories of multi-axle dynamic steering and vehicle dynamic, the steering angle relationships of different axles were analyzed. Taken a vehicle as an example, the corresponding steering mechanism was designed. Full vehicle model was established and handling stability performance was simulated. The results show that the mechanical dynamic steering vehicle can effectively improve vehicle agility performance at low speed and stability at high speed.

Ride and roll/yaw stability analysis of articulated frame steer vehicle with torsio-elastic suspension

2019 ◽  
Vol 234 (7) ◽  
pp. 1958-1971
Author(s):  
Mu Chai ◽  
Wencan Zhang ◽  
Daoyong Wang ◽  
Junjie Chen
Keyword(s):  
Critical Speed ◽  
Steering System ◽  
System Model ◽  
Lateral Acceleration ◽  
Vehicle Model ◽  
Vibration Acceleration ◽  
Elastic Suspension ◽  
Hydraulic Steering ◽  
Articulated Vehicles ◽  
Yaw Stability

An articulated frame steered vehicle model with torsio-elastic suspension is established in Adams/View. The model considered the influence of the hydraulic steering system on the yaw stability of articulated vehicles, thus, the hydraulic steering system is formulated and modeled in MATLAB/Simulink. The ride and roll/yaw stability of the vehicle model is investigated via co-simulation of Adams and Simulink. The Adams vehicle model is verified based on the vibration acceleration responses near the seat position at constant forward speeds. The hydraulic steering system model is validated through the steady-state steering maneuver. Relative ride performance of unsuspended and fully suspended vehicle is investigated in terms of unweighted and frequency-weighted root-mean-square accelerations. The roll and yaw stability of vehicle model with and without suspension at loaded and unloaded conditions are subsequently analyzed in terms of roll angle, roll safety factor, lateral acceleration, critical speed, and so on. The results show that the torsio-elastic suspension can efficiently reduce the vibrations of the vehicle, and the articulated frame steer vehicles applied with torsio-elastic suspension yield slightly lower roll/yaw stability but substantial reductions in the ride vibration levels. The results provide some reference for the suspension and steering system design of articulated engineering vehicle.

A Comparison of Quarter, Half and Full Vehicle Models With Experimental Ride Comfort Data

2015 ◽  
Author(s):  
Herman A. Hamersma ◽  
Schalk Els
Keyword(s):  
Degrees Of Freedom ◽  
Ride Comfort ◽  
Center Of Mass ◽  
Vehicle Body ◽  
Vehicle Model ◽  
Full Vehicle ◽  
Computational Capability ◽  
Quarter Car ◽  
Multi Body ◽  
Vertical Translation

The ride comfort of a vehicle is one of the first parameters used to evaluate its performance. Ride comfort has been one of the important research topics since the dawn of the automobile. With the improvement in computational capability, vehicle engineers have modeled vehicles with increasing complexity. Initially vehicles were simplified to quarter car models, where a quarter of the vehicle was modeled with two degrees of freedom (the vertical translation of the sprung and unsprung masses). The “pitch-bounce” model has four degrees of freedom, representing the pitch rotation and vertical translation (bounce) of the vehicle body and chassis and the vertical translation of the front and rear axles and wheels. Finally, with the development of multi-body systems (MBS) software, there is the possibility to model the full vehicle with suspension kinematics and numerous degrees of freedom. The full vehicle model used for this study has 15 unconstrained degrees of freedom and experimentally determined center of mass and inertias. This paper compares the response of a quarter car, pitch-bounce and full vehicle model with the measured response of an actual vehicle.

scholarly journals Dynamic Behavior and Force Analysis of the Full Vehicle Model using Newmark Average Acceleration Method

2020 ◽  
Vol 10 (1) ◽  
pp. 5330-5339
Author(s):  
E. Yildirim ◽  
I. Esen
Keyword(s):  
Degrees Of Freedom ◽  
Numerical Solutions ◽  
Equations Of Motion ◽  
Vehicle Model ◽  
Full Vehicle ◽  
Road Roughness ◽  
Average Acceleration ◽  
Road Excitation ◽  
Acceleration Method ◽  
Vehicle Components

In this study, the dynamic interaction between road and vehicle is modeled. For this purpose, a full vehicle model with eight degrees of freedom is considered. The equations of motion of the whole system are derived by the D’Alambert method and numerical solutions are obtained by the Newmark average acceleration method. Due to varying road roughness, the forces affecting the driver and the vehicle-components are analyzed in detail. Also, vertical and rotational displacements, velocities, and accelerations are examined, and results graphs are given. Two different pre-defined road profiles, created as non-random road excitation, and five different vehicle speeds are presented and analyzed.

scholarly journals Active Disturbance Rejection for a Three Degrees of Freedom Gyroscope

2018 ◽  
Vol 51 (13) ◽  
pp. 372-377 ◽  
Author(s):  
Juan E. Andrade García ◽  
Alejandra Ferreira de Loza ◽  
Luis T. Aguilar ◽  
Ramón I. Verdés
Keyword(s):  
Disturbance Rejection ◽  
Degrees Of Freedom ◽  
Active Disturbance Rejection ◽  
Three Degrees Of Freedom
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