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Skyhook

About: Skyhook is a(n) research topic. Over the lifetime, 640 publication(s) have been published within this topic receiving 8685 citation(s).

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Journal ArticleDOI: 10.1115/1.1434265
Abstract: In this paper, a road adaptive modified skyhook control for the semi-active Macpherson strut suspension system of hydraulic type is investigated. A new control-oriented model, which incorporates the rotational motion of the unsprung mass, is introduced. The control law extends the conventional skyhook-groundhook control scheme and schedules its gains for various road conditions. Using the vertical acceleration data measured, the road conditions are estimated by using the linearized new model developed. Two filters for estimating the absolute velocity of the sprung mass and the relative velocity in the rattle space are also designed. The hydraulic semi-active actuator dynamics are incorporated in the hardware-in-the-loop tuning stage of the control algorithm developed. The optimal gains for the ISO road classes are discussed. Experimental results are included. @DOI: 10.1115/1.1434265#

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Topics: Sprung mass (59%), Skyhook (58%), Gain scheduling (55%) ...read more

231 Citations


Journal ArticleDOI: 10.1016/J.CONENGPRAC.2008.05.002
Abstract: This paper is concerned with the design and the analysis of a semi-active suspension controller. In the recent years different kinds of semi-active control strategies, like two-state Skyhook, LQ-clipped or model-predictive control, have already been developed in the literature. In this paper, a new semi-active suspension control strategy that a priori satisfies the principal limitations of a semi-active suspension actuator (dissipative constraint and force bounds) is introduced using the tools of the linear parameter varying (LPV) theory. This new approach exhibits some interesting advantages (implementation, performance flexibility, robustness, etc.) compared to already existing methods. Both industrial criterion based evaluation and simulations on a nonlinear quarter vehicle model are performed to show the efficiency of the method and to validate the theoretical approach.

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Topics: Model predictive control (52%), Skyhook (52%), Suspension (vehicle) (51%)

227 Citations


Journal ArticleDOI: 10.1106/AERG-3QKV-31V8-F250
Seung-Bok Choi1, Moo-Ho Nam1, Byung-Kyu Lee1Institutions (1)
Abstract: This paper presents vibration control of a semi-active seat suspension with a magneto-rheological (MR) fluid damper, which is applicable to commercial vehicles such as large size of trucks. A cylindrical MR seat damper is designed on the basis of the Bingham model of the MR fluid. After manufacturing the seat damper, field-dependent damping force characteristics are experimentally evaluated. A semi-active seat suspension system installed with the seat damper is then constructed and its governing equation of motion is derived. A skyhook controller to reduce vibration level at the driver’s seat is formulated and realized in a closed-loop control fashion. The control responses, such as acceleration transmissibility, are investigated in both frequency and time domains. In addition, a full-vehicle model featuring the proposed semi-active seat suspension is established and its vibration control performances are evaluated via the hardware-in-the-loop simulation (HILS).

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Topics: Damper (57%), Vibration isolation (52%), Magnetorheological fluid (52%) ...read more

207 Citations


Journal ArticleDOI: 10.1016/J.YMSSP.2008.07.014
Abstract: This paper aims to highlight the practical viability of a new and novel hybrid control technique applied to a vehicle active suspension system of a quarter car model using skyhook and adaptive neuro active force control (SANAFC). The overall control system essentially comprises four feedback control loops, namely the innermost proportional-integral (PI) control loop for the force tracking of the pneumatic actuator, the intermediate skyhook and active force control (AFC) control loops for the compensation of the disturbances and the outermost proportional–integral–derivative (PID) control loop for the computation of the optimum target/commanded force. A neural network (NN) with a modified adaptive Levenberg–Marquardt learning algorithm was used to approximate the estimated mass and inverse dynamics of the pneumatic actuator in the AFC loop. A number of experiments were carried out on a physical test rig using a hardware-in-the-loop configuration that fully incorporates the theoretical elements. The performance of the proposed control method was evaluated and compared to examine the effectiveness of the system in suppressing the vibration effect on the suspension system. It was found that the simulation and experimental results were in good agreement, particularly for the sprung mass displacement and acceleration behaviours in which the proposed SANAFC scheme is found to outperform the PID and passive counterparts.

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Topics: Active suspension (62%), Adaptive control (59%), PID controller (58%) ...read more

200 Citations


Journal ArticleDOI: 10.1016/J.JSV.2003.11.048
Abstract: Active vibration isolation systems are less commonly used than passive systems due to their associated cost and power requirements In principle, semi-active isolation systems can deliver the versatility, adaptability and higher performance of fully active systems for a fraction of the power consumption Various semi-active control algorithms have been suggested in the past, many of which are of the “on–off” variety This paper studies the vibration isolation characteristics of four established semi-active damping control strategies, which are based on skyhook control and balance control A semi-active damper is incorporated into a single-degree-of-freedom (sdof) system model subject to base excitation Its performance is evaluated in terms of the root-mean-square (rms) acceleration transmissibility, and is compared with those of a passive damper and an ideal skyhook damper The results show that the semi-active system always provides better isolation at higher frequencies than a conventional passively damped system

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Topics: Vibration isolation (60%), Skyhook (56%), Damper (54%) ...read more

196 Citations


Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20222
202122
202032
201922
201832
201727

Top Attributes

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Topic's top 5 most impactful authors

Mehdi Ahmadian

35 papers, 704 citations

Seung-Bok Choi

18 papers, 676 citations

Khisbullah Hudha

15 papers, 112 citations

Norman M. Wereley

8 papers, 109 citations

Pakharuddin Mohd. Samin

8 papers, 76 citations

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