ISO 22140:2021

INTERNATIONAL ISO
STANDARD 22140
First edition
2021-06
Passenger cars — Validation of vehicle
dynamics simulation — Lateral
transient response test methods
Voitures particulières — Validation de la simulation de la dynamique
du véhicule — Méthodes d'essai de réponse transitoire latérale
Reference number
©
ISO 2021
© ISO 2021
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ii © ISO 2021 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Variables . 3
6 Simulation tool requirements . 3
6.1 General . 3
6.2 Mass and inertia . 3
6.3 Tires . 3
6.4 Suspensions . 4
6.5 Steering system . 4
6.6 Aerodynamics . 4
6.7 Brake system . 4
6.8 Powertrain . 5
6.9 Active control system (ESC system, active roll control, etc.) . 5
6.10 Data acquisition . 5
6.11 Driver controls . 5
7 Physical testing. 5
7.1 General . 5
7.2 Measuring equipment . 5
7.3 Test conditions . 5
7.4 Filtering of measured data . 6
7.5 Test methods . 6
7.5.1 Step input . 6
7.5.2 Sinusoidal input — One period . 7
7.5.3 Random input . 8
7.5.4 Pulse input. 8
7.5.5 Continuous sinusoidal input . 9
8 Simulation .10
8.1 General .10
8.2 Data recording and processing .10
8.3 Simulation method .10
8.3.1 Step input .10
8.3.2 Sinusoidal input — One period .10
8.3.3 Random input .11
8.3.4 Pulse input.11
8.3.5 Continuous sinusoidal input .12
9 Comparison between simulation and physical test results .13
9.1 Step input .13
9.2 Sinusoidal input — One period .15
9.3 Random input, pulse, and continuous sinusoidal input .17
9.3.1 General.17
9.3.2 Calculation of boundary point .17
9.3.3 Tolerance for frequency function .18
9.3.4 Validation criteria .19
10 Documentation .20
Bibliography .21
Foreword
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iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 33,
Vehicle dynamics and chassis components.
Any feedback or questions on this document should be directed to the user’s national standards body. A
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iv © ISO 2021 – All rights reserved

Introduction
The main purpose of this document is to provide a repeatable and discriminatory method for comparing
simulation results to measured test data from a physical vehicle for a specific type of test.
The dynamic behaviour of a road vehicle is a very important aspect of active vehicle safety. Any given
vehicle, together with its driver and the prevailing environment, constitutes a closed-loop system that
is unique. The task of evaluating the dynamic behaviour is therefore very difficult since the significant
interactions of these driver–vehicle–environment elements are each complex in themselves. A complete
and accurate description of the behaviour of the road vehicle necessarily involves information obtained
from a number of different tests.
Since this test method quantifies only one small part of the complete vehicle handling characteristics,
the validation method associated with this test can only be considered significant for a correspondingly
small part of the overall dynamic behaviour.
INTERNATIONAL STANDARD ISO 22140:2021(E)
Passenger cars — Validation of vehicle dynamics
simulation — Lateral transient response test methods
1 Scope
This document specifies methods for comparing computer simulation results from a vehicle
mathematical model to measured test data for an existing vehicle according to ISO 7401. The comparison
is made for the purpose of validating the simulation tool for this type of test when applied to variants of
the tested vehicle.
It is applicable to passenger cars as defined in ISO 3833.
2 Normative re
...