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).
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Variables
6 Simulation model parameters and requirements
6.1 General
6.2 Basic vehicle parameters — Mass and geometry
6.3 Estimated vehicle parameters
6.3.1 Height of the centre of gravity
6.3.2 Tyre lateral force characteristics
6.3.3 Suspension kinematics and compliance properties
6.3.4 Steering system
6.4 Additional model requirements
6.4.1 Powertrain
6.4.2 Chassis stiffness
6.4.3 Cabin suspension
6.4.4 Active braking systems and other active systems
6.4.5 Driver Control
7 Physical tests
7.1 General
7.2 Test methods
7.2.1 Constant radius test with slowly increasing velocity
7.2.2 Constant speed test with slowly increasing steering wheel angle
7.3 Evaluation of test results
7.3.1 Characteristic curves
7.3.2 Curve fitting
7.3.3 Gradient values
8 Simulation
8.1 General
8.2 Data recording
8.3 Documentation
9 Comparison of simulation and physical tests
9.1 Documentation
9.2 Calculation of boundary points
9.3 Comparison of gradient values
9.4 Validation process
Annex A (informative) Principle for comparing simulation and test results
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Variables
6 Simulation model parameters and requirements
6.1 General
6.2 Basic vehicle parameters — Mass and geometry
6.3 Estimated vehicle parameters
6.3.1 Height of the centre of gravity
6.3.2 Tyre lateral force characteristics
6.3.3 Suspension kinematics and compliance properties
6.3.4 Steering system
6.4 Additional model requirements
6.4.1 Powertrain
6.4.2 Chassis stiffness
6.4.3 Cabin suspension
6.4.4 Active braking systems and other active systems
6.4.5 Driver Control
7 Physical tests
7.1 General
7.2 Test methods
7.2.1 Constant radius test with slowly increasing velocity
7.2.2 Constant speed test with slowly increasing steering wheel angle
7.3 Evaluation of test results
7.3.1 Characteristic curves
7.3.2 Curve fitting
7.3.3 Gradient values
8 Simulation
8.1 General
8.2 Data recording
8.3 Documentation
9 Comparison of simulation and physical tests
9.1 Documentation
9.2 Calculation of boundary points
9.3 Comparison of gradient values
9.4 Validation process
Annex A (informative) Principle for comparing simulation and test results