ISO 19364:2016 pdf download

ISO 19364:2016 pdf download.Passenger cars — Vehicle dynamic simulation and validation — Steady-state circular driving behaviour
1 Scope
This document specifies a method for comparing computer simulation results from a vehicle mathematical model to measured test data for an existing vehicle according to steady-state circular driving tests as specified in ISO 4138 or the Slowly Increasing Steer Test that is an alternative to
ISO 4138. 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.
NOTE The Slowly Increasing Steer method is described in regulations such as USA FMVSS 126 “Federal Register Vol 72, No. 66, April 6, 2007” and UN/ECE Regulation No. 13-H, “Uniform provisions concerning the approval of passenger cars with regard to braking”.
2 Normative references
The following documents are referred to in 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 4138, Passenger cars — Steady-state circular driving behaviour — Open-loop test methods
ISO 15037-1, Road vehicles — Vehicle dynamics test methods — Part 1: General conditions for passenger cars
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1176, ISO 2416, ISO 3833,ISO 8855 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1 simulation
calculation of motion variables of a vehicle from equations in a mathematical model of the vehicle system
3.2 simulation tool
simulation environment including software, models, input data, and hardware case of hardware-in-the-loop simulation
3.3 cross plot
plot where the horizontal axis shows values for a variable other than time (e.g. lateral acceleration)
4 Principle
Open-loop test methods defined in ISO 4138 are used to determine the steady-state circular driving behaviour of passenger cars as defined in ISO 3833. The test characterizes vehicle-handling behaviour in steady-state conditions covering a range of cornering conditions from straight-line up to limit conditions for steering control. Results are typically reported by cross plotting steady-state measures of variables of interest against steady-state levels of lateral acceleration, and possibly calculating characteristic values based on gradients of the plotted data. Within this document, the purpose of the test is to demonstrate that a vehicle simulation tool can predict the vehicle behaviour within specified tolerances. The vehicle simulation tool is used to simulate a specific existing vehicle running through a steady-state test as specified in ISO 4138, or, alternatively, a Slowly Increasing Steer Test used in stability control evaluation. Simulation results are used to define graphical boundaries for overlaid cross-plots, and the data from physical testing are overlaid to see if the measurements fall within the acceptable ranges. NOTE This document may be used for several purposes. Depending on the purpose of the validation, only parts of the validation requirements may be met. The existing vehicle is physically tested at least three times to allow the test data to be compared with the simulation results.