The Mechanics of Automotive Hydraulic Dampers at High Stroking Frequencies

Segel, L; Lang, H.H.

doi:10.1080/00423118108968640

Cited by 42 publications

(25 citation statements)

References 2 publications

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“…Lang's model was the first physical macro model that actually aims to describe the behaviour of the damper in a broad range of operating conditions [5,6].The mechanistic model calculates the force from a system of differential equations. This means that besides the iterative identification procedure another iterative loop has to be implemented in order to integrate the differential equations.…”

Section: An Explicit Physical Modelmentioning

confidence: 99%

Evaluation of Shock Absorber Models

Duym¹,

Stiens²,

Reybrouck³

1997

Vehicle System Dynamics

106

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A non exhaustive overview of shock absorber models is presented. The ability of the models to match experimental data is emphasized. Two physical models are presented that are able to extract the internal valve parameters from data without hysteresis. In order to implement a model that copes with hysteresis, most models require the numerical solution to a set of nonlinear differential equations. The use of an alternative restoring force method can get round the time consuming iterative simulation and identification routines. The alternative nonpararnetric method models the force as a function of velocity and acceleration. The theoretical relevance of the model is studied.

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Section: An Explicit Physical Modelmentioning

confidence: 99%

Evaluation of Shock Absorber Models

Duym¹,

Stiens²,

Reybrouck³

1997

Vehicle System Dynamics

106

View full text Add to dashboard Cite

show abstract

“…The work of Lang [6] with Segel [7] is often cited in the published literature on damper modelling. The non-linear model developed by Lang contains 82 parameters.…”

Section: Baseline Model and Parameter Identificationmentioning

confidence: 99%

Modelling high frequency force behaviour of hydraulic automotive dampers

Yung

Cole

2006

Vehicle System Dynamics

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Little information on automotive damper performance above 30 Hz is found in the published literature. Design of vehicles for low levels of noise, vibration and harshness requires attention to higher frequencies. This paper describes research into modelling damper behaviour at frequencies up to 500 Hz. The performance of a monotube damper was measured and the empirical data were used to evaluate a recently published parametric model. Methods of assessing prediction accuracy using transfer and coherence functions, and a wavelet-based transfer function were introduced. Modifications to the model were then developed to improve the prediction of high-frequency behaviour.

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“…Regarding hysteresis in the characteristic diagrams of automobile dampers, it is worth noting that the literature [2,7] addresses this issue from a modeling standpoint by including compressibility effects. …”

Section: Linear Modelmentioning

confidence: 99%

Experimental Testing and Mathematical Modeling of the Interconnected Hydragas Suspension System

Rideout

Anderson

2003

SAE Technical Paper Series

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The Moulton Hydragas suspension system improves small car ride quality by interconnecting the front and rear wheel on each side of the vehicle via a hydraulic fluid pipe between the front and rear dampers. A Hydragas system from a Rover Group MGF sports car was statically and dynamically tested to generate stiffness and damping coefficient matrices. The goal was to develop the simplest possible model of the system for use in ride quality studies. A linear model showed reasonable accuracy over restricted frequency ranges. A second model used bilinear spring and damping constants, and was more accurate for predicting force at both the front and rear units for frequencies from 1 to 8 Hz. The Hydragas system static stiffness parameters, when used in the model, caused peak force underprediction in the jounce direction. The bilinear model required increased jounce stiffness to account for hysteresis in the rubber elements of the system, and dynamic fluid flow phenomena.

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The Mechanics of Automotive Hydraulic Dampers at High Stroking Frequencies

Cited by 42 publications

References 2 publications

Evaluation of Shock Absorber Models

Evaluation of Shock Absorber Models

Modelling high frequency force behaviour of hydraulic automotive dampers

Experimental Testing and Mathematical Modeling of the Interconnected Hydragas Suspension System

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