Analysis of Control Policies and Dynamic Response of a Q‐Car 2‐DOF Semi Active System

Abstract

Abstract. Several control policies of Q-car 2-DOF semiactive system, namely skyhook, groundhook and hybrid controls are presented. Their ride comfort, suspension displacement and road-holding performances are analyzed and compared with passive system. The analysis covers both transient and steady state responses in time domain and transmissibility response in frequency domain. The results show that the hybrid control policy yields better comfort than a passive suspension, without reducing the road-holding quality or increasing the suspension displacement for typical passenger cars. The hybrid control policy is also shown to be a better compromise between comfort, road-holding and suspension displacement than the skyhook and groundhook control policies.

Comparative Study of Different Vehicle Models with Respect to Their Dynamic Behavior

“…Based on the above, the aim of this paper is to conduct an assessment regarding the accuracy of the four most common vehicle models. In contrast to Faris et al [15] and Ihsan et al [16,17] who conducted comparative works more with respect to different semi-active control algorithms than with respect to vehicle models, in this work, the vehicle models with various configurations are compared in terms of accuracy and with respect to different performance metrics. More specifically, both passive and semi-active suspensions are considered, while the effect of adding anti-roll bars and tire dampers is also investigated.…”

Application of a novel linearization method to compare the on–off control strategies modeled by piecewise linear systems

“…The variation of dissipative forces developed by the semiactive damping devices is adjusted according to the used strategy. The most used semiactive strategies for vibration control of engineering structures are balance logic, skyhook, groundhook, and hybrid (Guglielmino et al, 2008; Ihsan et al, 2008; Keivan and Phillips, 2018; Mulla et al, 2014; Patil and Wani, 2015; Saaed et al, 2015; Savaresi et al, 2010).…”

Rule-based control of a semi-active suspension for minimal sprung mass acceleration: design and measurement

“…Finally, semi-active suspension, which controls the damping coefficient of the system, requires the least power and still offers significant improvement over passive suspension systems. [7][8][9] In this paper, the latter system will be considered.…”