ISO 7401:2011
Road vehicles — Lateral transient response test methods — Open-loop test methods
ISO 7401:2011 specifies open-loop test methods for determining the transient response behaviour of road vehicles. It is applicable to passenger cars, as defined in ISO 3833, and to light trucks.
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Scope
Normative references
Terms and definitions
General conditions
Principle
General
Test methods
Reference system
Variables
Measuring equipment
Description
Transducer installation
Data processing
Test conditions
General
Vehicle loading conditions
General
Minimum loading condition
Maximum loading condition
Warm-up
Test speed
Step input
Test procedure
Data analysis
Response time
Peak response time
Overshoot values
Data presentation
General
Time histories
Time response data summary
Sinusoidal input — one period (see ISO/TR 8725)
Test procedure
Data analysis
General
Lateral acceleration
Yaw velocity
Time lags
Lateral acceleration gain
Yaw velocity gain
Data presentation
General
Time histories
Time response data summary
Data as functions of lateral acceleration
Asymmetry factors
Random input (see ISO/TR 8726)
Test procedure
Data analysis
General
Preliminary analysis
Further data processing
Data presentation
General
Frequency response functions
Frequency response data summary
Pulse input
Test procedure
Data analysis
General
Preliminary analysis
Further data processing
Data presentation
General
Frequency response functions
Frequency response data summary
Continuous sinusoidal input
Test procedure
Data analysis
Amplitude
Lateral acceleration gain
Yaw velocity gain
Phase angle
Data presentation
General
Frequency response functions
Frequency response data summary
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Scope
Normative references
Terms and definitions
General conditions
Principle
General
Test methods
Reference system
Variables
Measuring equipment
Description
Transducer installation
Data processing
Test conditions
General
Vehicle loading conditions
General
Minimum loading condition
Maximum loading condition
Warm-up
Test speed
Step input
Test procedure
Data analysis
Response time
Peak response time
Overshoot values
Data presentation
General
Time histories
Time response data summary
Sinusoidal input — one period (see ISO/TR 8725)
Test procedure
Data analysis
General
Lateral acceleration
Yaw velocity
Time lags
Lateral acceleration gain
Yaw velocity gain
Data presentation
General
Time histories
Time response data summary
Data as functions of lateral acceleration
Asymmetry factors
Random input (see ISO/TR 8726)
Test procedure
Data analysis
General
Preliminary analysis
Further data processing
Data presentation
General
Frequency response functions
Frequency response data summary
Pulse input
Test procedure
Data analysis
General
Preliminary analysis
Further data processing
Data presentation
General
Frequency response functions
Frequency response data summary
Continuous sinusoidal input
Test procedure
Data analysis
Amplitude
Lateral acceleration gain
Yaw velocity gain
Phase angle
Data presentation
General
Frequency response functions
Frequency response data summary