Between simplicity and accuracy: Effect of adding modeling details on quarter vehicle model accuracy

Soong, Ming Foong; Ramli, Rahizar; Saifizul, Ahmad

doi:10.1371/journal.pone.0179485

Cited by 6 publications

(5 citation statements)

References 23 publications

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“…This is a lumped-mass, rigid body mathematical model that is commonly used in studies concerning fundamental suspension analyses, including inerter and semi-active suspensions [14]. While maintaining simplicity, it can be used to obtain qualitatively correct sprung and unsprung mass responses [23] for comparative analyses, and adequate accuracy are achievable without resorting to higher-DOF models [24]. For comprehensiveness, the quarter vehicle parameter values of a truck and a bus were adopted, as both these heavy vehicle classes were of interest in the study of inerter's performance benefit.…”

Section: Vehicle Modeling and Setup Of Analysismentioning

confidence: 99%

Investigation of inerter-based suspension systems for heavy vehicles

Soong

Ramli²,

Saifizul³

et al. 2023

PLoS ONE

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The inerter is a two-terminal component that can be added to the spring-and-damper configuration of a suspension system. It has the property that the force exerted is proportional to the relative acceleration at its terminals. Studies have demonstrated the inerter’s benefit of providing superior vibration isolation when it is used in the vehicle suspension of passenger cars. However, similar benefit on another common vehicle class on the roads, namely heavy vehicles, remain to be shown, as these vehicles have vastly different parameter values than passenger cars. This study is an investigation on the performance improvement brought by an inerter in the suspension of common heavy vehicles. In the study, the parameter values of a truck and a bus were adopted in the quarter vehicle model with two different spring-damper-inerter configurations (parallel and serial inerter), and the improvements in vibration isolation and road holding capability were determined by optimization of inertance. Results show that the inerter is similarly effective in providing the said improvements when implemented on heavy vehicles instead of on passenger cars, judging from reductions in sprung mass acceleration and dynamic tire load. It is also observed that the performance benefit is associated with larger optimum inertance than that for passenger cars. Overall, the inerter has been shown to be beneficial in the parallel and serial configurations, both of which are common and can be practically implemented in the suspension of heavy vehicles.

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Section: Vehicle Modeling and Setup Of Analysismentioning

confidence: 99%

Investigation of inerter-based suspension systems for heavy vehicles

Soong

Ramli²,

Saifizul³

et al. 2023

PLoS ONE

Self Cite

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“…Particularly, the value of the sprung mass ranges from 90 [39] to 476 kg [40] while the value of the unsprung mass ranges from 20 kg [3] to 80 kg [41]. Moreover, the values of the stiffness and the damping coefficients of the suspension lay in the ranges of 9000 N m [42] to 30,000 N m [43] and 980 N•s m to 4300 N•s m [44], respectively. In this study, the QC model consisted of a sprung mass m s = 270 kg connected to the unsprung mass, considered to have the value of 10% of the sprung mass, m u = 27 kg.…”

Section: Qc Modelmentioning

confidence: 99%

A Comparative Study of Integrated Vehicle–Seat–Human Models for the Evaluation of Ride Comfort

Koulocheris

Vossou

2023

Vehicles

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In the literature the value of the driver’s head acceleration has been widely used as an objective function for the modification of the suspension and/or the seat characteristics in order to optimize the ride comfort of a vehicle. For these optimization procedures various lumped parameter Vehicle–Seat–Human models are proposed. In the present paper a Quarter Car model is integrated with three Seat–Human models with different levels of detail. The level of detail corresponds to the number of degrees of freedom used to describe the Seat–Human system. Firstly, the performance of the Quarter Car model, used as a basis, is analyzed in six excitations with different characteristics. Then, the performance of the three lumped parameter Vehicle–Seat–Human models are monitored in the same excitations. The results indicated that in the case of single disturbance excitations the Quarter Car model provided 50–75% higher values of acceleration compared with the eight degrees of freedom model. As far as the periodic excitation is concerned, the Vehicle–Seat–Human models provided values of acceleration up to eight times those of the Quarter Car model. On the other hand, in stochastic excitations the Vehicle–Seat–Human model with three degrees of freedom produced the closest results to the Quarter Car model followed by the eight degrees of freedom model. Finally, with respect to the computational efficiency it was found that an increase in the degrees of freedom of the Vehicle–Seat–Human model by one caused an increase in the CPU time from 2.1 to 2.6%, while increasing the number of the degrees of freedom by five increased the CPU time from 7.4 to 11.5% depending on the excitation.

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“…Submodelos multibody desarrollados según modelos y parámetros Quarter Car existentes en el estado del arte (Ming Foong Soong [6], Jorge Hurel [7]) y aplicados en el análisis de la dinámica vertical de vehículos.…”

Section: Bodies02-05 Submodelos Quarter Car Ruedamotor -Suspensiónunclassified

Modelo multibody flexible vehículo automóvil 6GDL

Bazterra¹

2022

Congreso Iberoamericano De Ingeniería Mecánica-Cibim 2022

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El trabajo se centra en el desarrollo de un modelo multibody de vehículo automóvil completo con la inclusión de 6 GDL del mismo y características flexibles del chasis. El objetivo consiste en la obtención de un modelo más real respecto a las características deformables del chasis, componente más flexible del vehículo, en comparación con modelos totalmente rígidos tipo Quarter Car. Sobre un caso de vehículo L7E seleccionado, con suspensión double wishbone, se diseña un modelo multibody base según metodología standard. Este se define por 4 subconjuntos multibody de modelos Quarter Car y body de chasis. La totalidad de los componentes se definen como rígidos con propiedades de masa concentrada en los CG y tensores de inercia de los componentes. En base a este modelo inicial, se desarrollan 2 variantes del mismo, rígido y flexible, sobre los que se ejecutan los análisis de eventos/escenarios con presencia de cargas importantes de traccióncompresión, flexión y torsión. El body de chasis flexible se define por su modelo de modos normales de vibración desarrollado por FEM en el rango de frecuencia de las cargas presentes en los eventos. El análisis final de resultados de los eventos con subvariantes de modelo flexible según la inclusión de diferentes selecciones de modos normales tiene por objetivo establecer los criterios de selección de parámetros (rango frecuencia, modos, …) en la definición de chasis flexibles según esta metodología.

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Between simplicity and accuracy: Effect of adding modeling details on quarter vehicle model accuracy

Cited by 6 publications

References 23 publications

Investigation of inerter-based suspension systems for heavy vehicles

Investigation of inerter-based suspension systems for heavy vehicles

A Comparative Study of Integrated Vehicle–Seat–Human Models for the Evaluation of Ride Comfort

Modelo multibody flexible vehículo automóvil 6GDL

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