NUMERICAL KINEMATIC ANALYSIS OF THE DOUBLE WISHBONE MOTOR-VEHICLE SUSPENSION SYSTEM

2000 ◽  
Vol 24 (2) ◽  
pp. 391-399 ◽  
Author(s):  
H.A. Attia
Keyword(s):  
Kinematic Analysis ◽  
Motor Vehicle ◽  
Linear Equations ◽  
Rear Wheel ◽  
Front Wheel ◽  
Suspension System ◽  
Geometric Constraints ◽  
Nonlinear Constraint ◽  
Cartesian Coordinates ◽  
Vehicle Suspension System

In this paper, an efficient numerical algorithm for the kinematic analysis of a double wishbone suspension is presented. The double wishbone suspension system is usually used for front wheel axles of rear wheel driven cars. The kinematic analysis of the one-DOF suspension mechanism is carried out in terms of the rectangular Cartesian coordinates of some defined points in the links and the joints. Geometric constraints that fix the distances between the points belonging to the same rigid link are introduced. Additional driving constraints are added as a function of the input driving variables. The nonlinear constraint equations are solved by iterative numerical methods. The corresponding linear equations of velocity and acceleration are solved numerically to yield the velocities and accelerations of the unknown points on the wheel knuckle. The velocities and accelerations of the other points of interest can be calculated if their positions are locally specified. In addition, the angular velocity and acceleration of any link in the mechanism are evaluated. The presented formulation in terms of the system of coordinates based on the presented formulation in terms of the system of coordinates based on Cartesian coordinates of specified link points is simple and involves only elementary mathematics. A numerical example is presented.

Numerical Kinematic Analysis of the Motor-Vehicle Multi-Link Suspension System

1995 ◽  
Author(s):  
Maher G. Mohamed ◽  
Hazem A. Attia
Keyword(s):  
Kinematic Analysis ◽  
Motor Vehicle ◽  
Angular Position ◽  
Rigid Bodies ◽  
Suspension System ◽  
Nonlinear Constraint ◽  
Cartesian Coordinates ◽  
Constraint Equations ◽  
Angular Velocities ◽  
The One

Abstract In this paper, an efficient numerical algorithm for the kinematic analysis of a multi-link suspension system is presented. The suspension system is usually used for rear driven axles of current car productions. The kinematic analysis of the one-DOF spatial multi-link suspension mechanism which is composed of binary links connected by spherical joints is carried out in terms of the rectangular Cartesian coordinates of some defined points in the links and at the joints. By properly locating the points at the centers of the spherical joints, all the kinematic constraints are automatically eliminated. Geometric nonlinear constraints are introduced to fix the relative positions of the points on the rigid bodies. An additional drivingconstraint is added as a function of the input driving angular position. The nonlinear constraint equations are solved by iterative numerical methods. The corresponding velocity and acceleration equations are derived by differentiating the constraint equations. These equations are linear and can easily be solved numerically to yield the velocities and accelerations of the unknown points on the wheel knuckle. The velocities and accelerations of other points of interest can be calculated if their positions are specified. Also the angular velocities and accelerations of any link in the mechanism are evaluated from the Cartesian coordinates, velocities, and accelerations of any three defined points on the link. The presented formulation in terms of this system of coordinates is simple and involves only elementary mathematics. A numerical example is presented.

Numerical Kinematic Analysis of the MacPherson Strut Motor-Vehicle Suspension System

2000 ◽  
Author(s):  
Hazem A. Attia ◽  
Maher G. Mohamed
Keyword(s):  
Numerical Algorithm ◽  
Kinematic Analysis ◽  
Elementary Mathematics ◽  
Motor Vehicle ◽  
Suspension System ◽  
Vehicle Suspension ◽  
Numerical Example ◽  
Macpherson Strut Suspension ◽  
Vehicle Suspension System ◽  
Macpherson Strut

Abstract In the present paper, an efficient numerical algorithm for the kinematic analysis of the multi-loop MacPherson Strut suspension system is formulated. The suspension system is usually used for front as well as axles of current car productions. The spatial two-DOF multi-loop MacPherson Strut suspension mechanism contains all types of basic kinematic joints; revolute, prismatic, and spherical joints. The kinematic analysis is carried out in terms of the rectangular Cartesian coordinates of some defined points in the links and at the joints. The presented formulation in terms of this system of coordinates is simple and involves · only elementary mathematics. A numerical example is presented.

scholarly journals Modelling and simulation of motor vehicle suspension system

2021 ◽  
Vol 1107 (1) ◽  
pp. 012092
Author(s):  
Eyere Emagbetere ◽  
Peter A. Oghenekovwo ◽  
Christabel C. Obinabo ◽  
Abraham K. Aworinde ◽  
Felix A. Ishola ◽  
...  
Keyword(s):  
Motor Vehicle ◽  
Suspension System ◽  
Modelling And Simulation ◽  
Vehicle Suspension ◽  
Vehicle Suspension System

Kinematic Analysis and Optimization Design of Vehicle Suspension System

2012 ◽  
Vol 616-618 ◽  
pp. 2001-2004
Author(s):  
Yu Zhuo Men ◽  
Hai Bo Yu
Keyword(s):  
Optimization Design ◽  
Small Variation ◽  
Random Excitation ◽  
Front Wheel ◽  
Suspension System ◽  
Kinematic Characteristic ◽  
Vehicle Suspension ◽  
Before And After ◽  
Light Vehicle ◽  
Vehicle Suspension System

In order to study on the kinematic characteristic of a light vehicle suspension system, the kinematic simulation model of the whole double-wishbone independent suspension was built using ADAMS software. In order to reflect the actual running condition of the vehicle, the random excitation of the test platforms of the left and right wheels were created, respectively. The variable regularity of the kinematic characteristic parameters was uncovered in the process of the suspension motion. The irrationality of the suspension guiding mechanism design was pointed out through simulation and analysis, and the existent problems of the guiding mechanism were optimized and calculated. The results show that there is small variation of the front wheel orientation parameters before and after optimization, and all of them are within the design requirement ranges. The variation of the WCD (wheel center distance) and FWSS (front wheel sideways slippage) are bigger, and still within the ideal ranges after optimization. The anticipated optimization goal is achieved, and an important basis is provided for the improving design of the light vehicle suspension.

A study of a Kalman filter active vehicle suspension system using correlation of front and rear wheel road inputs

2000 ◽  
Vol 214 (5) ◽  
pp. 493-502 ◽  
Author(s):  
F Yu ◽  
J-W Zhang ◽  
D. A. Crolla
Keyword(s):  
Kalman Filter ◽  
Rear Wheel ◽  
Suspension System ◽  
Estimation Accuracy ◽  
Vehicle Suspension ◽  
Vehicle Speed ◽  
State Variables ◽  
Performance Improvements ◽  
Vehicle Suspension System ◽  
Active Vehicle Suspension System

Based on a half-vehicle model, an algorithm is proposed for a Kalman filter optimal active vehicle suspension system using the correlation between front and rear wheel road inputs. In this paper, two main issues were investigated, i.e. the estimation accuracy of the Kalman filter for state variables, and the potential improvements from wheelbase preview. Simulations showed good estimations from the state observer. However, if the wheelbase preview algorithm is incorporated, the estimation accuracy for the additional states significantly decreases as vehicle speed and the corresponding measurement noises increase. Significant benefits from wheelbase preview were further proved, and the available performance improvements of the rear wheel station could be up to 35 per cent. Because of the feasibility and effectiveness of the proposed algorithm, and no additional cost for measurements and sensing needs, wheelbase preview can be a promising algorithm for Kalman filter active suspension system designs.

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