Semi-active Fuzzy Sliding Mode Control of Full Vehicle and Suspensions

Abstract

The suspension of a vehicle is the support system between a vehicle body and wheels. The purpose of a suspension system is to support the vehicle body and increase ride comfort. Care must be taken in the design of a suspension system because if the attenuation force becomes large, the passenger will be subjected to a very rough ride under high-frequency disturbances, and if the attenuation force becomes small, the ride will feel overly soft at low frequencies. Furthermore, if the spring constant is too low, the vehicle’s natural frequency of vibration will be low, and thus the heave, rolling, and pitching will be large. In this study, a fuzzy sliding mode controller for a real vehicle has been designed. A new method for designing the fuzzy sliding mode switch hyperplane has been proposed. Experiment results are presented to confirm the effectiveness of this new algorithm.

Resonance, stability and chaotic vibration of a quarter-car vehicle model with time-delay feedback

“…Multivalued and non-smooth hysteresis will lead to many complicated behaviors such as bifurcation and chaos [4]. Recently, many new applications of active and semi-active control procedures to minimize vehicle vibrations have been developed by Guo et al [1], Liu et al [2], Lauwerys et al [3]. Chaos and bifurcation in nonlinear vehicle model have been studied by Li et al [4], Zhu and Mitsuaki [5], Litak et al [6].…”

Chaotic behaviors of a ground vehicle oscillating system with passengers

“…Many nonlinear units are used to reduce the vibration and impact of modern vehicles, e.g. magneto-rheological damper and unequal curvature spring [9][10][11]. Owing to the existence of the nonlinear factor, the vehicle exhibits complex phenomena, such as jumps, bifurcation, and chaotic vibrations, when running on a bumpy road that is quite harmful for the stabilization of a vehicle.…”

Nonlinear dynamic analysis of the whole vehicle on bumpy road

“…Numerical results by 4-order Runge-Kutta method presented the multiform dynamic behavior of the system. Keywords：vehicle nonlinear dynamics; chaotic movement; global bifurcation; Lyapunov exponent; nonlinear frequency response analysis In recent years, many nonlinear units are used to reduce the vibration and impact of modern vehicles, e.g., magneto-rheological damper, unequal curvature spring [1][2][3] .Owing to the existence of nonlinear factor, bifurcation and chaos may occur during vehicle running on bumpy road [4] , which are quite harmful to the stabilization of a vehicle. Traditional 1/2 or 1/4 vehicle models [5][6][7] cannot reflect the whole kinetic behavior, hence nonlinear dynamic analysis of the whole vehicle is important.…”

“…Numerical results by 4-order Runge-Kutta method presented the multiform dynamic behavior of the system. Keywords：vehicle nonlinear dynamics; chaotic movement; global bifurcation; Lyapunov exponent; nonlinear frequency response analysis In recent years, many nonlinear units are used to reduce the vibration and impact of modern vehicles, e.g., magneto-rheological damper, unequal curvature spring [1][2][3] .…”

“…In recent years, many nonlinear units are used to reduce the vibration and impact of modern vehicles, e.g., magneto-rheological damper, unequal curvature spring [1][2][3] .…”