ISO 19585:2019

Heavy commercial vehicles and buses — Vehicle dynamics simulation and validation — Steady-state circular driving behavior

This document specifies a method for comparing simulation results from a vehicle model to measured test data for an existing vehicle according to steady-state circular driving tests as specified in ISO 14792. The comparison is made for the purpose of validating the vehicle model for this type of test. This document applies to heavy vehicles, including commercial vehicles, commercial vehicle combinations, buses and articulated buses as defined in ISO 3833 (trucks and trailers with a maximum weight above 3,5 tonnes and buses and articulated buses with a maximum weight above 5 tonnes, according to ECE and EC vehicle classification, categories M3, N2, N3, O3 and O4).

Véhicules utilitaires lourds et autobus — Simulation et validation dynamique des véhicules — Tenue de route en régime permanent sur trajectoire circulaire

General Information

• Status: Published
• Publication Date: 10-Dec-2019
• ICS: 43.080.01 - Commercial vehicles in general
• Technical Committee: ISO/TC 22/SC 33 - Vehicle dynamics and chassis components
• Drafting Committee: ISO/TC 22/SC 33/WG 6 - Vehicle dynamics of heavy commercial vehicles and buses
• Current Stage: 9020 - International Standard under periodical review
• Start Date: 15-Oct-2024
• Completion Date: 15-Oct-2024

Relations

• Consolidated By: ISO/CIE 11664-4:2019 - Colorimetry — Part 4: CIE 1976 L*a*b* colour space
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 19585
First edition
2019-12
Heavy commercial vehicles and
buses — Vehicle dynamics simulation
and validation — Steady-state circular
driving behavior
Véhicules utilitaires lourds et autobus — Simulation et validation
dynamique des véhicules — Tenue de route en régime permanent sur
trajectoire circulaire
Reference number
©
ISO 2019
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ii © ISO 2019 – 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 . 2
6 Simulation model parameters and requirements . 3
6.1 General . 3
6.2 Basic vehicle parameters — Mass and geometry. 3
6.3 Estimated vehicle parameters . 3
6.3.1 Height of the centre of gravity . 4
6.3.2 Tyre lateral force characteristics . 4
6.3.3 Suspension kinematics and compliance properties . 5
6.3.4 Steering system . 5
6.4 Additional model requirements . 6
6.4.1 Powertrain . 6
6.4.2 Chassis stiffness . 6
6.4.3 Cabin suspension . 6
6.4.4 Active braking systems and other active systems . 6
6.4.5 Driver Control . 7
7 Physical tests . 7
7.1 General . 7
7.2 Test methods . 7
7.2.1 Constant radius test with slowly increasing velocity . 8
7.2.2 Constant speed test with slowly increasing steering wheel angle . 8
7.3 Evaluation of test results . 8
7.3.1 Characteristic curves . 8
7.3.2 Curve fitting . 8
7.3.3 Gradient values . .10
8 Simulation .11
8.1 General .11
8.2 Data recording .11
8.3 Documentation .11
9 Comparison of simulation and physical tests .11
9.1 Documentation .11
9.2 Calculation of boundary points.11
9.3 Comparison of gradient values .14
9.4 Validation process .14
Annex A (informative) Principle for comparing simulation and test results .16
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
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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
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2019 – 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 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 19585:2019(E)
Heavy commercial vehicles and buses — Vehicle dynamics
simulation and validation — Steady-state circular driving
behavior
1 Scope
This document specifies a method for comparing simulation results from a vehicle model to measured
test data for an existing vehicle according to steady-state circular driving tests as specified in ISO 14792.
The comparison is made for the purpose of validating the vehicle model for this type of test.
This document applies to heavy vehicles, including commercial vehicles, commercial vehicle
combinations, buses and articulated buses as defined in ISO 3833 (trucks and trailers with a maximum
weight above 3,5 tonnes and buses and articulated buses with a maximum weight above 5 tonnes,
according to ECE and EC vehicle classification, categories M3, N2, N3, O3 and O4).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 14792, Road vehicles — Heavy commercial vehicles and buses — Steady-state circular tests
ISO 3833, Road vehicles — Types — Terms and definitions
ISO 8855, Road vehicles — Vehicle dynamics and road-holding ability — Vocabulary
ISO 15037-2:2002, Road vehicles — Vehicle dynamics test methods — Part 2: General conditions for heavy
vehicles and buses
ISO 19364, Passenger cars — Vehicle dynamic simulation and validation — Steady-state circular driving
behaviour
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 3833, ISO 8855, ISO 15037-2,
ISO 19364 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
simulation
calculation of motion variables of a vehicle from equations in a mathematical model of the vehicle system
3.2
vehicle configuration
fundamental vehicle characteristic influencing the vehicle dynamics
EXAMPLE Number of axles, axle types, number and type of the vehicle units.
Note 1 to entry: An example of axle types can be independent suspension or rigid axle.
3.3
basic vehicle parameters
parameters not subject to model fitting, which are dire
...