A novel semi-active control strategy based on the quantitative feedback theory for a vehicle suspension system with magneto-rheological damper saturation

Jeyasenthil, R.; Choi, Seung‐Bok

doi:10.1016/j.mechatronics.2018.06.016

Cited by 33 publications

(19 citation statements)

References 30 publications

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“…Note that this kind of first-order model for the controlled damping characteristic is corroborated by other results in the literature, as seen in [33,52].…”

Section: Remarksupporting

confidence: 88%

“…• Hong et al [31] apply a skyhook control strategy to yield better performances, considering a static damper model; • Du et al [16] use H ∞ control method for SA suspensions with MR dampers, with, once again, a purely static model; • Jeyasenthil and Choi [33] present a strategy based on quantitative feedback theory, using a first-order model for the damping force; • Olma et al [54] present an observer-based nonlinear control strategy for SA suspension control, but, once again, with purely static damper force model. • recently, Tudon-Martinez et al [70] discuss the influence of a good model in SA suspension control performance, for the case of MR dampers.…”

Section: Sa Suspension Control Workmentioning

confidence: 99%

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Development of a simple ER damper model for fault-tolerant control design

Morato

Pham

Sename

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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This work presents a concise control-oriented model for electro-rheological (ER) dampers. This model can serve for faulttolerant control purposes, considering automotive suspension performance enhancement. ER dampers present, basically, a resistance against shearing that varies according to a controlled electric field. The main purpose of this work is to describe the force dynamics delivered by these ER dampers with a simple/reduced-order model that catches its overall behaviour with accuracy. One of the key points in the proposed approach is to describe the dynamics of the controlled portion of the damper force as a first-order system. Synthetically, this study is twofold: (1) the first part is an analytical approach towards the dynamic modelling of the ER damper force, wherein a reduced-order model is obtained, parameters are identified, and validation results are presented; (2) the second analyses the possible faults on these dampers and incorporates their affect to the developed model, which is of paramount importance for diagnosis and reliability of suspension systems. Hence, the proposed model is adequate for the design and synthesis of fault detection and diagnosis/fault-tolerant control (FDD/FTC) schemes, being able to run fast in real time in embedded electronic control units, that usually operate within 1-10 ms. Throughout this study, simulation and experimental validation tests are performed on a real 1/5-scaled vehicle testbed. Model parameters are identified via relatively simple procedures performed in this testbed. Results are shown to illustrate how the model can be used for FDD and FTC of semi-active suspension systems. The overall results assess the ability and the accuracy of the proposed model to characterize the force delivered by ER dampers in both healthy and faulty conditions.

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“…Note that this kind of first-order model for the controlled damping characteristic is corroborated by other results in the literature, as seen in [33,52].…”

Section: Remarksupporting

confidence: 88%

Section: Sa Suspension Control Workmentioning

confidence: 99%

Development of a simple ER damper model for fault-tolerant control design

Morato

Pham

Sename

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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“…When the damper piston is moving in a reciprocating motion, friction between magnetizable particles embedded in the rubber ring and the piston rod creates vertical nicks on the rod and the carrier fluid will leak from those nicks, causing the seal failure of the damper. Some research shows that with fluid leakage, its mechanical properties will change greatly, the energy consumption area will decrease sharply, and controlling time delay will be longer, which seriously affects the vibration control effect of the MR fluid (grease) damper (Iyengar et al, 2004;Lu et al, 2011;Wang et al, 2012;Tudón-Martínez and Morales-Menendez, 2015;Jeyasenthil and Choi, 2018). Therefore, leakage shortens the service life of the MR fluid (grease) damper and restricts its application in practical projects.…”

Section: Introductionmentioning

confidence: 99%

Development, Test, and Mechanical Model of the Leak-Proof Magnetorheological Damper

Zhao

Zhang

et al. 2019

Front. Mater.

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As a semi-active control device, the magnetorheological (MR) damper has received much praise for its great controllability, quick response, and lower input power. However, the problem of liquid leakage arises after its long-term service, severely affecting its performance and service life. To solve this problem, this paper proposes fully vulcanizing and consolidating viscoelastic material, the cylinder barrel and the piston rod, which replaces the traditional dynamic seal with a static seal, and developing a new leak-proof MR damper. Considering that viscoelastic material has a certain energy dissipation and fluid-structure interaction with MR fluid, the correction factor of the pressure gradient is introduced to establish the mechanical model of the leak-proof MR damper which is to be tested. The testing result shows that warpage deformation of viscoelastic material weakens the damping force of the MR damper and the weakening effect increases with current intensity. Given the influence of current intensity on the correction factor, the complete mechanical model of the leak-proof MR damper is obtained on the basis of the verified model. Through the comparison between the theoretical calculation curve and the test curve, the revised mechanical model is found to well reflect the mechanical properties of the leak-proof MR damper.

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“…The following bump excitation has been widely used to study the transient response characteristic 20 and is described by

z_{r 1} = \frac{h}{2} (1 - \cos (ω_{r} t)); 0.1 < t < 0.75;

z_{r 2} = \frac{h}{2} (1 - \cos (ω_{r} t)); 1 < t < 1.75;

where, h = 0.03 m is the bump height, and

ω_{r} = 2 π V / D

, the width of the bump ( D ) is 0.8 m. And, the vehicle travels the bump with constant velocity ( V ) of 0.833 m/s. If the vehicle velocity increases, damper will reach the stopper mode due to maximum stroke increased as passing velocity increases.…”

Section: Performance Analysismentioning

confidence: 99%

“…For semiactive suspension, the work reported in Reference 19 is the first application of QFT. Recently, the authors proposed a QFT‐based novel semiactive suspension control in Reference 20 to address the problems such as MR damper fault and saturation, and the damping force tracking problem using the cascade approach in Reference 21. Moreover, so far, the application of QFT to vehicle suspension control is restricted to the quarter car suspension system.…”

Section: Introductionmentioning

confidence: 99%

Robust semiactive control of a half‐car vehicle suspension system with magnetorheological dampers: Quantitative feedback theory approach with dynamic decoupler

Jeyasenthil

Yoon

Choi

et al. 2020

Intl J Robust & Nonlinear

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This article presents the quantitative feedback theory (QFT) based multivariable controller for the vertical and the pitch angle motion of a half‐car suspension system. A coupled half‐car system with significant uncertainty, due to sprung masses variation, poses a challenging control problem. Multi‐input multi‐output (MIMO) QFT method is used for this purpose which involves converting the actual MIMO system into an equivalent single‐input single‐output (SISO) system so that the design problem is carried out using the SISO QFT principles. The proposed idea is centered on by converting the coupled MIMO system into a decoupled one using the dynamic decoupler where in controllers are designed independently based on the equivalent SISO system. The designed QFT‐based controllers with the decoupler use the semiactive suspension strategy (realized using the magnetorheological (MR) damper) to reduce the vibration of the half‐car suspension system (in vertical/pitch angular motion) and hence to increase the ride comfort and the vehicle road holding. The feedback cost is less in the proposed design than the sequential QFT design. In this study, the MR damper dynamics is captured by the first‐order model which is realistic, efficient, and simple form. Extensive comparative simulation studies are carried out to illustrate the effectiveness of the proposed design over the existing methods such as passive and skyhook control under different road excitation.

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A novel semi-active control strategy based on the quantitative feedback theory for a vehicle suspension system with magneto-rheological damper saturation

Cited by 33 publications

References 30 publications

Development of a simple ER damper model for fault-tolerant control design

Development of a simple ER damper model for fault-tolerant control design

Development, Test, and Mechanical Model of the Leak-Proof Magnetorheological Damper

Robust semiactive control of a half‐car vehicle suspension system with magnetorheological dampers: Quantitative feedback theory approach with dynamic decoupler

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