Extended Ground-Hook - New Concept of Semi-Active Control of Truck's Suspension

Valášek, Michael; Novák, Márk; Šika, Z.; Vaculı́n, O.

doi:10.1080/00423119708969333

Cited by 136 publications

(71 citation statements)

References 4 publications

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“…The damping force is (8) One interesting point to be noted here is that without the passivity constraint, Eq. (7) can be used as a controller for a fully active suspension system as well.…”

Section: Adaptive Semi-active Suspension Controlmentioning

confidence: 99%

“…Groundhook control: Analogous to the skyhook algorithm, the groundhook control algorithm [8] tries to attenuate the dynamic tire force by emulating a fictitious damper d gnd attached between the unsprung mass and a static frame on the ground. Mathematically, (2) Clipped optimal control: In this control scheme, first an optimal controller is designed using techniques like LQR or LQG, to generate the optimal control force F a which is assumed to take any arbitrary value [9], i.e., can act as an actuator as well as an energy dissipater.…”

Section: Control Algorithms In Prior-artmentioning

confidence: 99%

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A New Adaptive Controller for Performance Improvement of Automotive Suspension Systems with MR Dampers

Khajepour

Agrawal

2014

SAE Int. J. Passeng. Cars - Mech. Syst.

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A control algorithm is developed for active/semi-active suspensions which can provide more comfort and better handling simultaneously. A weighting parameter is tuned online which is derived from two components -slow and fast adaptation to assign weights to comfort and handling. After establishing through simulations that the proposed adaptive control algorithm can demonstrate a performance better than some controllers in prior-art, it is implemented on an actual vehicle (Cadillac STS) which is equipped with MR dampers and several sensors. The vehicle is tested on smooth and rough roads and over speed bumps.

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“…The damping force is (8) One interesting point to be noted here is that without the passivity constraint, Eq. (7) can be used as a controller for a fully active suspension system as well.…”

Section: Adaptive Semi-active Suspension Controlmentioning

confidence: 99%

Section: Control Algorithms In Prior-artmentioning

confidence: 99%

A New Adaptive Controller for Performance Improvement of Automotive Suspension Systems with MR Dampers

Khajepour

Agrawal

2014

SAE Int. J. Passeng. Cars - Mech. Syst.

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“…Such systems can be used both to reduce sprung mass accelerations, a criterion of driver comfort, and as an approach to mitigating dynamic tyre forces applied to a pavement or bridge deck [2,14,15].…”

Section: Active/semi-active Suspension Strategiesmentioning

confidence: 99%

“…Commonly used criteria for the characterisation of suspension performance in terms of road damage [2,27] and driver comfort [2,14,27] are measurements of root mean square (RMS) tyre force and RMS body acceleration respectively. For certain profiles (SI1, AR2), the maximum RMS body acceleration experienced is marginally increased by up to 2.0%, though levels remained within accepted limits [28].…”

Section: Validationmentioning

confidence: 99%

Reduction of bridge dynamic amplification through adjustment of vehicle suspension damping

Harris

O’Brien

González

2007

Journal of Sound and Vibration

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Publication informationJournal of Sound and Vibration, 302 (3): 471-485 Publisher ElsevierLink to online version http://dx.doi.org/10.1016/j.jsv.2006.11.020Item record/more information http://hdl.handle.net/10197/2531Publisher's statement All rights reserved. Publisher's version (DOI)10. 1016/j.jsv.2006.11.020 Downloaded 2019-03-25T00:10:59ZThe UCD community has made this article openly available. Please share how this access benefits you. Your story matters! (@ucd_oa) Some rights reserved. For more information, please see the item record link above. AbstractThis paper presents a novel approach to the reduction of short-span bridge dynamic responses to heavy vehicle crossing events. The reductions are achieved through adjustment of the vehicle suspension damping coefficient just before the crossing.Given pre-calculations of the response of a vehicle-bridge system to a set of 'unit' road disturbances, it is shown that a single optimum damping coefficient may be determined for a given velocity and any specified road profile. This approach can facilitate implementation since the optimum damping is selected prior to the bridge and there is no need to continuously vary the damping coefficient during the crossing.The concept is numerically validated using a bridge-vehicle interaction model with several road profiles, both measured and artificially generated. The bridge-friendly damping control strategy is shown to reduce bridge dynamics across a typical range of vehicle velocities, proving most effective for road profiles that induce large vibrations in the vehicle-bridge system.

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“…Active and semi-active dampers in the vehicle are studied by Karnopp et al [12], initially with the goal of reducing magnitudes of sprung mass accelerations. Semi-active suspension control strategies have been presented by Cebon [13] and Valášek et al [14] with the goal of minimizing tire-pavement interaction forces as well as maintaining or improving vehicle ride quality.…”

Section: Introductionmentioning

confidence: 99%

The development of a dynamic amplification estimator for bridges with good road profiles

O’Brien

González

2006

Journal of Sound and Vibration

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Publication informationJournal of Sound and Vibration, 293 (1-2): 125-137Publisher Elsevier ABSTRACTThe paper considers the influence of the surface profile on the dynamic amplification of a simply supported bridge when subject to a quarter car vehicle model. The effect of the profile irregularities on the bridge dynamic amplification is characterized with a 'response surface' giving dynamic amplification due to a 'unit ramp' at any location. Even though the dynamic interaction problem is non-linear, the effects of all ramps which together make up a road profile can be calculated separately and added using the 'response surface'. This superposition process achieves reasonable accuracy for 'good' (moderately smooth) surfaceprofiles. An accurate estimate of dynamic amplification for bridges is demonstrated with a wide range of good profiles.Keywords: DAF, DAE, dynamic, roughness, bridge, vehicle.

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Extended Ground-Hook - New Concept of Semi-Active Control of Truck's Suspension

Cited by 136 publications

References 4 publications

A New Adaptive Controller for Performance Improvement of Automotive Suspension Systems with MR Dampers

A New Adaptive Controller for Performance Improvement of Automotive Suspension Systems with MR Dampers

Reduction of bridge dynamic amplification through adjustment of vehicle suspension damping

The development of a dynamic amplification estimator for bridges with good road profiles

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