WOLFRAM SYSTEM MODELER

# DamperComparison

Model comparing passive damper with semi-active damper.

# Wolfram Language

In[1]:=
`SystemModel["IndustryExamples.AutomotiveTransportation.SeatSuspension.DamperComparison"]`
Out[1]:=

# Seat Suspension: Damper Comparison

## Introduction

This model compares the response of a simple passive damper with that of a hybrid semi-active damper over a range of frequencies corresponding to an application in a truck seat suspension system. The model is constructed from components in the Modelica.Mechanics.Translational library. The Wolfram Language is used to estimate and visualize the amplitude frequency response curve.

View the model diagram for this model.

In order to get the full experience of this example, you need the following:

These pages show an overview of the example. For the full example, open the accompanying notebook SeatSuspension.nb.

This model is based on B. A. Reichert, Jr., "Application of Magnetorheological Dampers for Vehicle Seat Suspensions," M.S. thesis, Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, 1997.

## Numerical Experimentation

Simulate the model from the Wolfram Langauge to compare the performance of a simple passive damper with a hybrid semi-active damper over a range of frequencies:

## Analysis & Custom Visualization

Use the Wolfram Language to numerically estimate the amplitude response as a function of frequency and produce a custom visualization:

# Parameters (3)

m Value: 70 Type: Mass (kg) Description: Mass of the sliding masses Value: 5000 Type: TranslationalSpringConstant (N/m) Description: Spring constants Value: 500 Type: TranslationalDampingConstant (N·s/m) Description: Damping constants

# Components (9)

spring2 Type: Spring Description: Passively damped spring. Type: Damper Description: Passive damper. Type: Mass Description: Passively damped mass. Type: Mass Description: Actively damped mass. Type: Spring Description: Actively damped spring. Type: Position Description: Position of passively damped spring. Type: Position Description: Position of actively damped spring. Type: SemiActiveDamper Description: Semi-active damper. Type: ChirpSignal Description: Input signal.