This paper presents the design and analysis of a new adaptive fuzzy (AF) logic and hybrid (skyhook plus groundhook) control technique applied to a semi-active suspension system of a quarter car mode. The hybrid control is applied because of its very good performance in ride comfort and road handling. Meanwhile, Fuzzy adaptive system is suitable for analysis of stability with non-linear performa...

In this paper, a method for reducing unspring mass as well as improving safety and ride properties of vehicles driven by in-wheel motors will be provided. To begin with, the advantages of vehicles armed with in-wheel motors will be described, after which some drawbacks of this idea will be studied. Then, to getting a better analysis, quarter car model will be studied in frequency domain. Gain o...

In this paper the problem of input-output finite-time stabilization of linear time-varying systems is dealt with. The classical definition of input-output finite-time stability (IO-FTS) is extended to that one of structured IO-FTS, which allows to incorporate, in the definition of the stabilization problem, some amplitude constraints on the control input variables. A sufficient condition and a ...

This paper develops a nonlinear anti-lock braking system combined with active suspensions applied to a quarter-vehicle model by employing nonlinear backstepping control design schemes. An anti-lock braking system must have the potentials to release the wheel-locking situation and assist the car to stop at shorter distance. Although the braking distance can be reduced by the control torque from ...

This paper presents the design of Genetic Algorithm tuned Distance based Fuzzy Sliding Mode Controller (GA+DFSMC) applied to vehicle suspension system of a quarter car model. DFSMC has only one-dimensional rule table and the generation of fuzzy rules becomes easier. Genetic Algorithm (GA) is proposed to tune the gain parameters to increase the speed of system response and to reduce the chatteri...

The purpose of this paper is to present a robust strategy in controlling a hydraulically actuated active suspension system. The controller consists of the two controller loops namely inner loop controller for force tracking control of the hydraulic actuator and outer loop controller to reject the effects of road induced disturbances. The outer loop controller utilized a proportional integral sl...

The purpose of suspension system in automobiles is to improve the ride comfort and road handling. In this research the ride and handling performance of a specific automobile with passive suspension system is compared to a proposed fuzzy logic semi active suspension system designed for that automobile. The bodysuspension-wheel system is modeled as a two degree of freedom quarter car model. MATLA...

Suspension system plays an imperative role in retaining the continuous road wheel contact for better road holding. In this paper, fuzzy self-tuning of PID controller is designed to control of active suspension system for quarter car model. A fuzzy self-tuning is used to develop the optimal control gain for PID controller (proportional, integral, and derivative gains) to minimize suspension work...

This study investigates a control methodology for dynamic systems based on representing all possible system responses under all possible values of the control variables. The underlying idea is to extend the system along the ‘control dimension’ and explicitly account for the dependence of the system state on control variables. A spectral discretisation along the ‘control dimension’ is employed. ...