Design of Vehicle Active Suspension System Using Discrete-Time Sliding Mode Control With Parallel Genetic Algorithm

Abstract

Sliding mode control (SMC) has gained a wide acceptance in recent years due to its simplicity and robustness. Discrete-time sliding mode control (DSMC) is advantageous over its continuous-time counterparts due to the development in digital signal processing. However, little attention has been paid to the application of DSMC to the design of active suspensions. In this research, DSMC-based active suspensions are designed using both the SMC theory and a genetic algorithm (GA) to improve the ride quality and handling performance with the full states observed by a discrete-time Kalman filter. The extensive computation demand levied by the GA is handled by using the parallel computation technique. The proposed optimization-based SMC approach simplifies the design process and improves the overall performance of the controlled system.

Experimental study and analytical model of bleed valve orifice influence of a high-performance shock absorber on vehicle dynamics

“…The suspension system plays an essential role on the vehicle behaviour; it improves the car performance while driving, minimizing the risk of collisions, and also increasing the control and the comfort of the vehicle. 1,2 In this context, automobile manufacturers have been working during years in the set of elements that conforms the suspension; one of these components is the presence of shock absorber and its influence on suspension system. Several researches have modelled the damper behaviour under different conditions; however, changes in the configuration of the damper and its effect on the vehicle is an issue that remains unknown.…”

“…One of the major advances in the automotive area has been the ability to evaluate the performance of the vehicle dynamics while driving; however, despite technological advances, the inclusion of a suspension system within the vehicle evaluation systems is one aspect that is still in development nowadays, obtaining good results in some cases. [1][2][3] Nevertheless, given the complexity of its operation and the wide variety of configurations, it has not yet been possible to continually evaluate the behaviour of the suspension while driving. This is mainly due to the operation of the damper, so it is necessary for the evaluation system to be capable of predicting the behaviour of the damper when its specifications and performance are similar to the work conditions.…”

Sliding Mode Control for Bearingless Induction Motor Based on a Novel Load Torque Observer

“…According to the Lyapunov stability theory, the existence condition of generalized sliding mode is written as [12] Differentiating (14) with respect to time, it becomes (15) by substituting (13):…”

“…Sliding mode variable structure control, as a kind of special nonlinear control, can operate in accordance with the trajectory designed by people and purposefully adjust operation according to the system status, which can gain excellent control performance. Due to the fact that the sliding mode control not only can be set by people, but also does not need high precision mathematical model and has strong robustness to disturbances, it is becoming a hot research topic [11][12][13][14][15], and it is gradually applied in the AC servo system. In [16], a new reaching law was designed to improve the operation quality of sliding mode.…”