Optimization of suspension system of off-road vehicle for vehicle performance improvement

2013 ◽  
Vol 20 (4) ◽  
pp. 902-910 ◽  
Author(s):  
M. Mahmoodi-Kaleibar ◽  
I. Javanshir ◽  
K. Asadi ◽  
A. Afkar ◽  
A. Paykani
Keyword(s):  
Performance Improvement ◽  
Suspension System ◽  
Road Vehicle ◽  
Vehicle Performance

scholarly journals Optimisation of AWD off-road vehicle performance using visco-lock devices

2008 ◽  
Vol 15 (2/3/4) ◽  
pp. 188 ◽  
Author(s):  
A.M. Sharaf ◽  
G. Mavros ◽  
H. Rahnejat ◽  
P.D. King ◽  
S.K. Mohan
Keyword(s):  
Road Vehicle ◽  
Vehicle Performance

Simulation of a Hydropneumatic Suspension for Agricultural Working Vehicles

2021 ◽  
pp. 268-287
Author(s):  
Nicola Bosso ◽  
Nicolò Zampieri ◽  
Aurelio Somà ◽  
Francesco Mocera ◽  
Emanuele Conte
Keyword(s):  
Kinematic Model ◽  
Suspension System ◽  
Vehicle Performance ◽  
Vehicle Simulation ◽  
Complete Vehicle ◽  
Simulation Results

The chapter shows the study and simulation of a hydropneumatic suspension to be adopted for a telescopic handler vehicle. The hydropneumatic suspension system with independent wheels and with quadrilateral architecture has been studied to improve comfort and productivity of the existing vehicle, which has a suspended rigid axle on the front and a rigid axle on the rear, limiting the comfort and the grip. After the choice of the architecture and the kind of suspension, the chapter shows the design of the suspension kinematics. The optimization of the characteristic angles of the suspension has been performed using Adams/Car and Adams/Insight. The kinematic model optimized is subsequently reproduced in Adams/View to simulate the dynamics of the complete vehicle. Simulation results are used to evaluate vehicle performance in terms of comfort and stability according to the methods proposed by the standards.

scholarly journals Fuzzy Hybrid Control of Off-Road Vehicle Suspension Fitted With Magnetorheological Dampers

2012 ◽  
Author(s):  
W. G. Ata ◽  
S. O. Oyadiji
Keyword(s):  
Vibration Suppression ◽  
Suspension System ◽  
The Body ◽  
Vehicle Suspension ◽  
Magnetorheological Dampers ◽  
Road Vehicle ◽  
Mr Dampers ◽  
Smart Dampers ◽  
Compression Springs ◽  
Suspension Performance

The vibration caused by severe road excitation influences off-road vehicle suspension performance. The vibration control of the suspension system is a crucial factor for modern vehicles. Smart control devices (magnetorheological dampers) are proposed as a first step to handle a multiple suspension system of off-road vehicles. The magnetorheological (MR) dampers can be employed as smart dampers for vibration suppression of the suspension system; this is done by varying the produced damping force. In this paper an investigation is presented on the effectiveness of such smart dampers in attenuating the vibration of a multiple suspension system. This goal is accomplished by designing a new fuzzy hybrid controller and studying its effectiveness on the suspension performance. The multiple suspension system considered here comprises a chassis, five wheels and three MR dampers. The chassis is suspended over the five wheels through five compression springs. Three MR dampers are attached to the first, second and the fifth wheel. The stiffness of the wheels is represented by five compression springs. Only the bounce and the pitch of the chassis are considered. The assessment of the proposed model is carried out through a simulation scheme under bump and sinusoidal excitations in the time domain. The excitation of the five wheels is done independently. The simulation is accomplished using the MATLAB/SIMULINK software. The simulation results show the effectiveness and robustness of the new controller in conjunction with MR dampers in vibration suppression. Compared to the passive suspension, the body bounce, body displacement, angular acceleration and pitch angle can be well controlled.

Computational Analysis of a Concept of Rear Suspension System for Off- Road Vehicle

2012 ◽  
Author(s):  
Diego David Silva Diniz ◽  
Arthur Azevedo Ferreira ◽  
Raphael de Sousa Silva ◽  
Antonio Almeida da Silva ◽  
Wanderley Ferreira de Amorim @sJr.
Keyword(s):  
Computational Analysis ◽  
Suspension System ◽  
Road Vehicle ◽  
Rear Suspension

Dynamic modeling and damping performance improvement of two stage ISD suspension system

2021 ◽  
pp. 095440702110599
Author(s):  
Fanjie Li ◽  
Xiaopeng Li ◽  
Dongyang Shang ◽  
Zhenghao Wang
Keyword(s):  
Performance Improvement ◽  
Ride Comfort ◽  
Excitation Amplitude ◽  
Random Excitation ◽  
Suspension System ◽  
Vehicle Suspension ◽  
Vehicle Speed ◽  
Two Stage ◽  
Vehicle System ◽  
Vehicle Suspension System

In this paper, the dynamics of the vehicle suspension system under the random excitation and the periodic excitation are investigated. To improve the damping performance of the vehicle suspension system, a two stage ISD suspension with “Inerter-Spring-Damper” in each stage is proposed based on electromechanical similarity theory. A vehicle dynamic model with two stage ISD suspension is established in this paper. The dynamic equation is solved by the Runge-Kutta method and the dynamic response of the whole vehicle system is obtained. Taking the traditional suspension as the comparison object, the dynamic characteristics of the system under random excitation and periodic excitation are studied in the time domain, and the suppression effect of the suspension designed in this paper on the resonance peak is verified in the frequency domain. The influence of the inertia coefficient on the damping performance of the vehicle suspension system is analyzed. The effects of excitation amplitude and vehicle speed on ride comfort improvement of vehicle system with two stage ISD suspension are discussed respectively. The results show that, the resonance peak values of body acceleration, dynamic travel of rear suspension and rear tire dynamic load frequency response are reduced by 59.1%, 21.6%, and 60.3% respectively. With the increase of excitation amplitude in the range of 0.02–0.04 m, the ride comfort improvement of two stage ISD suspension system is always more than 61%. With the increase of vehicle speed in the range of 10–25m/s, the performance improvement rate of two stage ISD suspension system can reach more than 34.1%.

Dynamic Simulation of Road Vehicle Performance Under Transient Accelerating Conditions

1996 ◽  
Vol 210 (1) ◽  
pp. 11-21 ◽  
Author(s):  
C-W Hong
Keyword(s):  
Steady State ◽  
Dynamic Simulation ◽  
Thermal Inertia ◽  
Engine Performance ◽  
Reconstruction Method ◽  
Passenger Cars ◽  
Road Vehicle ◽  
Vehicle Performance ◽  
Inertia Effects ◽  
Engine Model

A personal computer-based simulation package has been developed to design the powertrain system of passenger cars aiming to operate at optimal performance. This package is capable of dynamic simulation of road vehicle performance under transient accelerating conditions. Two methods are included: one is the traditional transient-reconstruction method using steady-state engine performance maps; the other is a dynamic simulation technique newly developed by the author. The latter is described in this paper. It is based on cyclic analysis of the engine thermofluid-combustion phenomena with additional considerations of flow inertia, thermal inertia and mechanical inertia effects. This transient engine model plus a dynamic powertrain model and a transient road-load simulation make it possible to predict the automobile performance under road-driving conditions. Two examples of transient performance prediction, including a sudden full-throttle acceleration at a fixed gear and a changing-gear starting acceleration from standstill, are demonstrated in this paper. These examples show that the relation between the engine speed and the road speed under accelerating conditions is very different to the steady-state relationships normally assumed.

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