Analysis of control policies and dynamic response of a Q-car 2-DOF semi active system
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In this article, 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 domainAbstract:
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 policiesread more
Citations
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Journal ArticleDOI
Semi-active Damping using a Hybrid Control Approach
TL;DR: In this article, a hybrid control framework is used to design semi-active controllers for vibration reduction, where the skyhook damper can be recast in the framework of an event-driven intermittent controller.
Journal ArticleDOI
Ride quality of passenger cars: an overview on the research trends
TL;DR: In this paper, the main areas of research in ride quality and review significant literature that is related to this issue, focusing on passenger cars, are discussed and different approaches whether theoretical or experimental that are used to evaluate ride quality.
Journal ArticleDOI
Ride performance analysis of half-car model for semi-active system using RMS as performance criteria
TL;DR: In this article, the root mean square (RMS) responses to acceleration input for four state variables: the ms vertical acceleration, the ms pitch angular acceleration and the front and rear deflections of the suspensions.
Journal ArticleDOI
A comparative ride performance and dynamic analysis of passive and semi-active suspension systems based on different vehicle models
TL;DR: Ride comfort, suspension displacement and road-holding performances are compared for three different models – quarter (Q), half (H) and full (F) car models and results show that the simpler model gives significantly higher responses.
References
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Patent
System for controlling the transmission of energy between spaced members
Michael J Crosby,Dean C Karnopp +1 more
TL;DR: In this paper, a semi-active suspension system with active damper coupled in parallel between spaced members is described. But the damping characteristics of the damper are actively varied as a function of some control condition such as displacement, velocity, acceleration or the like for generating an active force resistant to relative movement between the members.
Journal ArticleDOI
Some aspects of the investigation of random vibration influence on ride comfort
TL;DR: In this article, the influence of broadband random vibrations on the human body was examined through the seat-to-head transmissibility function (STHT), and the results have formed the basis for further laboratory and field investigations.
Journal ArticleDOI
Transient Dynamics of Semiactive Suspensions with Hybrid Control
Mehdi Ahmadian,Nader Vahdati +1 more
TL;DR: In this article, the effect of hybrid control technique on transient dynamics of semi-active vehicle suspensions is studied analytically, using a quarter-car model, and the results show that several tradeoffs exist between the transient response of the vehicle body and the axle.
Proceedings ArticleDOI
Investigation of the response time of magnetorheological fluid dampers
TL;DR: In this paper, the authors investigate the response time of magnetorheological (MR) dampers and the effect of operating parameters, including operating current, piston velocity, and system compliance.
Dissertation
Transient Motion Control of Passive and Semiactive Damping for Vehicle Suspensions
TL;DR: The results of the study show that semiactive dampers have minimal effect on improving the vehicle body and tire transients due to forces or torques applied to the body, as compared to passive dampers.