A mathematical model of a vehicle dynamic system capable of predicting ride comfort can be a useful tool for vehicle design and development engineers at the concept design stage. The aim of this study was to develop a simple mathematical model of a vehicle with seat and occupant to investigate how vehicle dynamic parameters affect the vibration transmission and ride quality. A 13 degrees-offree...

Suspension is the general name of device that connects conductive force between car body and wheels. Among them, operational stability ride comfort are two contradictory requirements in actual driving. In traditional vehicle suspension system, order to maintain vehicle, vibration energy caused by uneven road surface usually dissipated passive shock absorber form heat. If this part can be recove...

For a vehicle equipped with active single-wheel steering, brake, drive and suspension systems a nonlinear vehicle model is presented. On the basis of this model an integrated vehicle dynamics control is developed comprising all of the mentioned chassis actuators to control the plane vehicle motion. The basic control strategy consists in two parts. One part is a flatness based tracking controlle...

In this paper, the problem of comfort and handling improvements of a ground vehicle is treated through the joint control of the suspension and braking systems. Two H∞ gain-scheduled controllers are synthesized to achieve, attitude and yaw performances according to the driving situation, observed through of a simple vehicle monitor. The proposed strategy tackles the nonlinear tire braking force ...

The presence of fast and slow modes in vehicle suspension systems, based on a half car model, is utilized in the design of active suspension control using singular perturbation theory. This strategy is based on the slow-fast control design. The suspension system performance is optimised with respect to ride comfort, road holding and suspension rattle space as expressed by the mean-square-values...

This report presents a method to obtain the suspension deformation and velocity of a semi-active suspension system with a variable damping coe cient. The goal of this internship is to derive the suspension states by using only acceleration sensors, these sensors are relatively low cost and simple to install in an existing vehicle. The applications considered in this report are a quarter car veh...

Abstract: In order to coordinate the damping performance and energy regenerative performance of energy regenerative suspension, this paper proposes a structure of vehicle semi-active energy regenerative suspension with electro-hydraulic actuator (EHA). In light of the proposed concept, a specific energy regenerative scheme is designed and the mechanical properties test is carried out. Based on ...

Non-linear characteristic of tire forces is the main cause of vehicle lateral dynamics instability, while direct yaw moment control is an effective method to recover the vehicle stability. In this paper, an optimal linear quadratic regulator (LQR) controller for roll-yaw dynamics to articulated heavy vehicles is developed. For this purpose, the equations of motion obtained by the MATLAB sof...