Preventing the Rollover Phenomenon of the Vehicle by Using the Hydraulic Stabilizer Bar Controlled by a Two-Input Fuzzy Controller

Abstract

When the vehicle is traveling at high speed and suddenly steers, a rollover phenomenon may occur. The main cause of this phenomenon is the appearance of a centrifugal force, which is proportional to the mass and the square of the velocity. In order to limit this situation, the method of using the hydraulic stabilizer bar (active stabilizer bar) has been proposed. The performance of the hydraulic stabilizer bar is highly dependent on the control method, which has been designed to ensure the stabilizer bar's operation. Previous research often only used simple dynamics models and conventional linear control methods. Therefore, the performance of the stabilizer bar is not guaranteed. At the same time, the factors affecting the movement of a vehicle are not mentioned. This will cause inaccuracies. This research used a spatial dynamics model combined with a non-linear double-track dynamics model, which fully describes the effects of vehicle oscillations. Besides, the two-input Fuzzy control method is also proposed. This is a completely novel model, and it is not like the previous models that have been used to study the stabilizer bar. The results of this research show that if the vehicle uses the hydraulic stabilizer bar controlled by a two-input Fuzzy controller, the values of the roll angle and roll index have been reduced. As a result, stability and safety have been significantly improved. The achievements of this research will be the basis for the development of other intelligent control methods in the future.

Enhancing the Stability and Safety of Vehicle When Steering by Using the Active Stabilizer Bar

“…e dynamics model used in Marzbanrad's study has only eight degrees of freedom [31]. With two input parameters, namely the roll angle and displacement of the unsprung mass, Nguyen proposed a two-input fuzzy controller [29]. According to this result, the rollover index of the vehicle was greatly reduced when the hydraulic stabilizer bar was used (Figure 8).…”

A Hybrid Control Algorithm Fuzzy-PI with the Second Derivative of the Error Signal for an Active Suspension System

“…Besides, these coefficients need to change continuously to meet the requirements of the system. Based on the fuzzy theory [51,52], the Fuzzy-PI integrated control algorithm is proposed. e schematic diagram of this model is shown in Figure 2.…”

A complex rollover dynamics model with active stabilizer bar controlled by the fuzzy algorithm

“…The influence of hydraulic actuators is further indicated by Varga et al. with the model of the half-dynamics ( Varga et al., 2013 ) and Nguyen with the model of the spatial dynamics ( Nguyen, 2021c , 2021e ). In addition, several studies on electronic stabilizer bars have also been published ( Kong et al., 2016 ; Buma et al., 2010 ; Zhang et al., 2018 ; Zhen-Xing et al., 2016 ).…”