An extended fuzzy controller for a vehicle active suspension system

Abstract

An extended fuzzy logic controller (EFLC) based on interval fuzzy membership functions is proposed for a vehicle active suspension system. With the degree of uncertainty in fuzzy membership functions, interval fuzzy membership functions are self-generated to cover more general uncertainties which occur from understanding linguistic knowledge and fuzzy rules in typical fuzzy methods. A novel adaptive strategy is designed to self-tune the interval fuzzy inference and to deduce the crisp outputs with feedback structure. A simulation study on a half-vehicle active suspension system has demonstrated that the proposed EFLC outperforms a conventional fuzzy logic controller.

Improve active suspension system by FEL controller design

“…By selecting the appropriate state variables, the matrix of the state space equations are determined by Eqs. (8) and (9).…”

“…In 2010, Salem and colleagues [7], compared an active suspension system to the fuzzy control and the PID controller. In 2010, Cao and colleagues [8], proposed a development fuzzy logic controller for active suspension system. In 2010, Shirdel [9], designed the Linear Quadratic regulator controller (LQR) controller and H → ∞ controller for active suspension in the linear quarter car model.…”

Optimal Design of Structure and Control Parameters of Active Suspension Based on PID Control

“…x is the acceleration of sprung mass; F d =k 1 (x 1 -q) is the dynamic load of unspung mass; x 1 -q is the tire deflection; f d =x 2 -x 1 is the suspension deflection; 1 δ ′ is the weight of F d ; 1 δ is the weight of x 1 -q; 2 δ is the weight of f d .…”

“…The active suspension is a closed-loop control system and has been a focus for many years in vehicle engineering because that it has a great potential to improve vehicle ride comfort and safety [1][2][3][4][5]. Control strategy is one of core technologies of an active suspension.…”

A quarter-car suspension model for dynamic evaluations of an in-wheel electric vehicle

“…13 The literature review summarised above was further expanded to include passive, semi-active and active suspension adaptive control systems in order to assess their stability and dynamics. [14][15][16][17] The passive system relies on inertia as well as the spring dampening factor, and no control systems are required in the vehicle. 18 Active suspension systems can either store, dissipate or generate energy to sprung and unsprung masses.…”