ISO 12021-2010 PDF

Full title and description

Road vehicles — Sensitivity to lateral wind — Open-loop test method using wind generator input. This International Standard specifies an open‑loop laboratory test method, using a wind generator input, to determine the sensitivity of road vehicles to lateral wind; it is intended for passenger cars (as defined in ISO 3833), passenger car–trailer combinations and light trucks.

Abstract

ISO 12021:2010 defines an open‑loop test procedure for assessing vehicle dynamic response to lateral wind using a wind generator. The method yields comparative measures of sensitivity to lateral wind under controlled test conditions that are not representative of all real driving situations but are useful for development, evaluation and comparative testing. The standard replaces the earlier ISO 12021-1:1996.

General information

• Status: Published — confirmed (current).
• Publication date: 2010‑12 (Edition 1, 2010; approved 23 Nov 2010 / published Dec 2010).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 43.020 (Road vehicles engineering).
• Edition / version: Edition 1 (2010).
• Number of pages: 14 (ISO edition PDF length as published by ISO).

Scope

Specifies an open‑loop laboratory test method using wind generator input to determine the sensitivity to lateral wind of passenger cars (ISO 3833), passenger car‑trailer combinations and light trucks. The standard describes test conditions, vehicle instrumentation and data to be recorded, and defines measured responses and indices that characterise vehicle sensitivity to lateral wind. It notes that the specified test conditions are not fully representative of on‑road driving but provide repeatable measures for development and comparison.

Key topics and requirements

• Definition of open‑loop wind generator input signals and test sequences for lateral wind excitation.
• Vehicle categories covered (passenger cars as per ISO 3833, car‑trailer combinations, light trucks) and applicability notes (motorcycles not covered/under investigation).
• Instrumentation and measurement requirements (vehicle kinematics, yaw, lateral acceleration, steering input and other dynamic variables).
• Procedure for conducting repeatable wind sensitivity tests in a laboratory environment and for deriving sensitivity metrics.
• Limits and caveats: test conditions are controlled and not fully representative of real driving — results intended for comparative and development use, not as a direct substitute for on‑road behaviour.

Typical use and users

Used by vehicle manufacturers, vehicle dynamics test laboratories, automotive R&D departments and regulatory or conformance test bodies during development, validation and comparative evaluation of vehicle lateral‑wind behaviour. Also useful for suppliers of active safety/stability systems and researchers studying wind‑induced vehicle dynamics.

Related standards

Replaces ISO 12021‑1:1996 (withdrawn). Cross‑references ISO 3833 (vehicle category definitions). Related work falls under ISO/TC 22 (Road vehicles), in particular subcommittees addressing vehicle dynamics and testing; national/adopted versions (e.g., BS ISO 12021:2010) are available. Users often consult other vehicle dynamics and test standards from ISO/TC 22 when integrating wind sensitivity testing into broader validation programs.

Keywords

lateral wind, wind sensitivity, open‑loop test, wind generator, vehicle dynamics, passenger car, light truck, vehicle testing, ISO 3833.

FAQ

Q: What is this standard?

A: ISO 12021:2010 is an ISO International Standard that specifies an open‑loop laboratory test method, using wind generator input, to determine the sensitivity of road vehicles to lateral wind.

Q: What does it cover?

A: It covers test procedures, wind generator input signals, instrumentation and measured responses for passenger cars (ISO 3833), passenger car‑trailer combinations and light trucks to characterise lateral‑wind sensitivity. It also explains the limitations of laboratory test conditions versus real driving.

Q: Who typically uses it?

A: Vehicle manufacturers, R&D and test laboratories, safety and stability system developers, and regulatory or standards bodies involved in vehicle dynamics testing.

Q: Is it current or superseded?

A: ISO 12021:2010 is the current published version and replaced ISO 12021‑1:1996. The ISO record shows the 2010 edition as published and later confirmed in review (confirmations recorded up to 2023).

Q: Is it part of a series?

A: It continues and replaces the earlier ISO 12021‑1:1996 open‑loop method; it is part of the body of ISO standards on road‑vehicle testing developed under ISO/TC 22 and related subcommittees. Users often reference vehicle classification standards such as ISO 3833 alongside this test method.

Q: What are the key keywords?

A: lateral wind, wind generator, open‑loop test, vehicle sensitivity, vehicle dynamics, passenger car, light truck.