A Novel Sliding Mode Control Algorithm for an Active Suspension System Considering with the Hydraulic Actuator

Duc Ngoc Nguyen,Tuan Anh Nguyen,Ngoc Duyen Dang

doi:10.1590/1679-78256883

Duc Ngoc Nguyen, Tuan Anh Nguyen + Show 1 more

Open Access

https://doi.org/10.1590/1679-78256883

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Abstract

The suspension system has the role of regulating and extinguishing oscillations in the vehicle. To improve stability and comfort, the active suspension system is proposed to replace the passive suspension system. There are many algorithms used for active suspension system control, such as PID, LQR, Fuzzy, etc. Among them, the nonlinear control method which uses the SMC algorithm gives a stable performance. This research proposes the use of the SMC algorithm to control the operation of the active suspension system equipped with a quarter dynamics model. The process of linearization of the hydraulic actuator is presented in the paper. As a result of the simulation, the values of displacement and acceleration of the sprung mass were significantly reduced when the vehicle used the active suspension system controlled by the SMC algorithm. The SMC controller established in this paper provides stability in many situations. Therefore, the vehicle's smoothness and comfort have been significantly improved. In the future, intelligent algorithms can be combined with SMC algorithms to improve the efficiency of the controller.

Highlights

Vehicle oscillation has a great influence on the health of passengers and the quality of goods
Several parameters are considered, such as displacement of the sprung mass, acceleration of the sprung mass, roll angle, etc. These parameters are evaluated based on the maximum value and the average value which is calculated according to the Root Mean Square (RMS) (Tian and Nguyen, 2020)
Simulation condition In this research, the excitation from the pavement has the form of a sine wave (Figure 5)

Summary

Introduction

Vehicle oscillation has a great influence on the health of passengers and the quality of goods. Several parameters are considered, such as displacement of the sprung mass, acceleration of the sprung mass, roll angle, etc These parameters are evaluated based on the maximum value and the average value which is calculated according to the Root Mean Square (RMS) (Tian and Nguyen, 2020). The idea of using semi-active suspension was proposed by Aljarbouh and Fayaz (Aljarbouh and Fayaz, 2020). This suspension system uses the Electro-Rheological damper (ER), which is controlled by an electric current. Besides changing the stiffness of the spring and damper, the idea of integrating a hydraulic actuator into the suspension was proposed. According to (Wang et al, 2018), this suspension system is called the active suspension system

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