Synthesis of a Magneto-Rheological vehicle suspension system built on the variable structure control approach

Stutz, Leonardo Tavares; Rochinha, Fernando A.

doi:10.1590/s1678-58782011000400008

Cited by 9 publications

(5 citation statements)

References 23 publications

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“…Where 𝑡 2 = 𝑡 1 + 𝜏 𝑡 1 is the time required for the front wheel to impact the bump, 𝑡 2 is the time required for the rear wheel to impact the bump, and τ is the delay time for the rear wheel to impact the bump. The sinusoidal induced disturbance for the front wheel is given in equation ( 20) (Stutz and Rochinha, 2011) as:…”

Section: Input Road Profile Excitationmentioning

confidence: 99%

Parametric study of rider’s comfort in a vehicle with semi-active suspension system under transient road conditions

Ajayi

Ojogho²,

Adewusi³

et al. 2023

J. Eng. Exact Sci.

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Considering that many Nigerian roads are untarred, the effect of frequent plying of these untarred roads on passengers and the expected performance of suspension system of vehicles are important for health and safety reasons. This is significant because the transmission of vibration associated with suspension systems are dependent on the frequency spectrum of the road input, and the nature of the suspension system and the vehicle seating arrangement that is producing the vibration. Thus, this study focuses on the discomfort experienced by passengers based on parametric study of vehicle with semi-active suspension system under transient road conditions. The modeling of the of semi-active vehicle suspension system properties are contrived on the mass- spring damper system for 4 degree-of–freedom half- car model integrated with 3 degrees of freedom human-seat arrangement. Using vehicle parameters, the severity of ride discomfort experienced by the passenger as the vehicle traversed transient road conditions (i.e., traversing obstruction) was evaluated in terms of the vibration dose value (VDV). Results of simulation based on the parametric studies are presented and the vibration dose values evaluated to show the dependence of vehicle ride comfort on the characteristics of the various elements of the vehicle suspension such as stiffness and damping characteristics. The result showed that the variation of sprung mass and suspension stiffness of the vehicle had more significant effects on passenger discomfort than the variation of the unsprung mass. The parametric study also revealed that suspension stiffness affects the suspension working space as the vehicle traversed transient road condition.

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Section: Input Road Profile Excitationmentioning

confidence: 99%

Parametric study of rider’s comfort in a vehicle with semi-active suspension system under transient road conditions

Ajayi

Ojogho²,

Adewusi³

et al. 2023

J. Eng. Exact Sci.

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“…Zazwyczaj osoba modelująca posiłkuje się danymi zgromadzonymi podczas badań doświadczalnych [12,16] oraz informacjami dotyczącymi budowy anatomicznej [23,24], istniejącymi dyrektywami, normami, a przede wszystkim sformułowanym celem badań. Dostępne w literaturze modele cechują się różnym stopniem złożoności, od kilku [26,28,33] do kilkunastu stopni swobody [1,16]. Modele rozbudowane zwykle stosuje się, gdy przy jednym źródle wymuszenia zamierza się równocześnie badać zachowanie różnych narządów wewnętrznych ciała.…”

Section: Wprowadzenieunclassified

Modeling the Vertical Dynamics of a Car on an Mechatronic Basis

Chróst

Margielewicz

2015

SJSUTST

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This paper presents the results obtained on the basis of the mechatronic model of a passenger car. In order to minimize the induced mechanical vibrations during drive event on a coarse road surface, a modification of the structure of the vehicle suspension has been applied. The proposed modification introduces additional active damping element, which task is to reduce the vertical displacement of the vehicle body. In the real world such a target can be achieved by use of appropriate control units, which drive the electronic and hydraulic components of the suspension. Additionally, the phenomenological models of the passengers have been included into the computer simulation model.

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“…Most commonly, these systems allow acting on the damping of the system through the introduction of external energy to the system. For example, magnetorheological dampers [ 27 ], which incorporate magnetic particles suspended in a viscous liquid, can alter their rheological properties by the application of an external magnetic field [ 28 , 29 ]. In other cases, the application of external energy to a motor acting on the suspension allows the appropriate damping characteristic to be achieved [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Can a Semi-Active Energy Harvesting Shock Absorber Mimic a Given Vehicle Passive Suspension?

Reyes-Avendaño

Moreno-Ramírez

Gijón-Rivera

et al. 2021

Sensors

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Energy harvesting shock absorbers (EHSA) have made great progress in recent years, although there are still no commercial solutions for this technology. This paper addresses the question of whether, and under what conditions, an EHSA can completely replace a conventional one. In this way, any conventional suspension could be replicated at will, while recovering part of the wasted energy. This paper focuses on mimicking the original passive damper behavior by continuously varying the electrical parameters of the regenerative damper. For this study, a typical ball-screw EHSA is chosen, and its equivalent suspension parameters are tried to be matched to the initial damper. The methodology proposes several electrical control circuits that optimize the dynamic behavior of the regenerative damper from the continuous variation of a load resistance. The results show that, given a target damper curve, the regenerative damper can adequately replicate it when there is a minimum velocity in the damper. However, when the damper velocity is close to zero, the only way to compensate for inertia is through the introduction of external energy to the system.

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Synthesis of a Magneto-Rheological vehicle suspension system built on the variable structure control approach

Cited by 9 publications

References 23 publications

Parametric study of rider’s comfort in a vehicle with semi-active suspension system under transient road conditions

Parametric study of rider’s comfort in a vehicle with semi-active suspension system under transient road conditions

Modeling the Vertical Dynamics of a Car on an Mechatronic Basis

Can a Semi-Active Energy Harvesting Shock Absorber Mimic a Given Vehicle Passive Suspension?

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