Abstract
This paper discusses the role of the active anti-roll bar system in order to enhance the roll stability of cars, thereby preventing rollover phenomenon in high speed emergency situations. First, an integrated full car model is proposed including the longitudinal, lateral, vertical motions and an electro-hydraulic actuator model. In this full car model, the control signal being the input current which is supplied to the actuators to create the active torques to improve the car's stability. This is the most general model in theory to study this active roll control system and is a big step forward compared to previous related studies. The optimal LQR control method has then been used to synthesize the controller based on the integrated model with 26 degrees of freedom. The criteria used to assess the vehicle roll stability are the sprung mass roll angle and the interactive force between the wheels and the road surface. The simulation results in the frequency domain and the validation in the time domain through the CarSim software's nonlinear car model clearly show the advantages of this active system with an optimal LQR controller in preventing vehicle rollover.
Highlights
Nowadays, the automobile has become the main means of transportation in all countries of the world
The simulation results of the integrated full car model using the two EH actuators with a state feedback LQR controller are evaluated in the frequency domain
This paper presents building an integrated model that includes a full car model: lateral, longitudinal and vertical motions with the EH actuators on the two axles
Summary
The automobile has become the main means of transportation in all countries of the world. Vu Van Tan - Preventing rollover phenomenom with an active anti-roll bar system using electro-hyraulic actuators: a full car model road surface at the four wheels and the steering angle from the driver.
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