WOLFRAM SYSTEM MODELER

DamperComparison

Model comparing passive damper with semi-active damper.

Diagram

Wolfram Language

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

Information

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.

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:

In order to get the full experience of this example, you need a desktop Wolfram Language product. A free trial download is available at www.wolfram.com/mathematica/trial/

For the full example, open the accompanying notebook SeatSuspension.nb.

Parameters (3)

m

Value: 70

Type: Mass (kg)

Description: Mass of the sliding masses

c

Value: 5000

Type: TranslationalSpringConstant (N/m)

Description: Spring constants

d

Value: 500

Type: TranslationalDampingConstant (N⋅s/m)

Description: Damping constants

Components (9)

spring2

Type: Spring

Description: Passively damped spring.

damper2

Type: Damper

Description: Passive damper.

mass2

Type: Mass

Description: Passively damped mass.

mass1

Type: Mass

Description: Actively damped mass.

spring1

Type: Spring

Description: Actively damped spring.

base2

Type: Position

Description: Position of passively damped spring.

base1

Type: Position

Description: Position of actively damped spring.

semiActiveDamper

Type: SemiActiveDamper

Description: Semi-active damper.

chirp

Type: ChirpSignal

Description: Input signal.