Document ID: chunk:federal_register_of_legislation:F2018C00341:body:0:p45
Version: federal_register_of_legislation:F2018C00341
Segment Type: other
Provision Reference: 
Character Range: 128533–131673

form of Annex 9 – Appendix 2 of UNECE Regulation No. 13-H– UNIFORM PROVISIONS CONCERNING THE APPROVAL OF PASSENGER CARS WITH REGARD TO BRAKING, incorporating supplement 14 to the 00 series of amendments.

     DYNAMIC STABILITY SIMULATION TOOL AND ITS VALIDATION

       1. SPECIFICATION OF THE SIMULATION TOOL

       1.1. The simulation method shall take into account the main factors which influence the directional and roll motion of the vehicle.  A typical model may include the following vehicle parameters in an explicit or implicit form:
        (a) Axle/wheel
        (b) Suspension
        (c) Tyre
        (d) Chassis/vehicle body
        (e) Power train/driveline, if applicable
        (f) Brake system
        (g) Pay load

       1.2. The Vehicle Stability Function shall be added to the simulation model by means of:
        a) A subsystem (software model) of the simulation tool; or
        b) The electronic control box in a hardware-in-the-loop configuration.

       2. VALIDATION OF THE SIMULATION TOOL

       2.1. The validity of the applied modelling and simulation tool shall be verified by means of comparisons with practical vehicle tests.  The tests utilised for the validation shall be the dynamic manoeuvres of paragraph 5.9. of Appendix 2.

        During the tests, the following motion variables, as appropriate, shall be recorded or calculated in accordance with ISO 15037 Part 1:2005: General conditions for passenger cars or Part 2:2002: General conditions for heavy vehicles and buses (depending on the vehicle category):
        (a) Steering-wheel angle (H)
        (b) Longitudinal velocity (vX)
        (c) Sideslip angle () or lateral velocity (vY);(optional)
        (d) Longitudinal acceleration (aX); (optional)
        (e) Lateral acceleration (aY)
        (f) Yaw velocity (d/dt)
        (g) Roll velocity (d/dt)
        (h) Pitch velocity (d/dt)
        (i) Roll angle ()
        (j) Pitch angle ()

       2.2. The objective is to show that the simulated vehicle behaviour and operation of the vehicle stability function is comparable with that seen in practical vehicle tests.

       2.3. The simulator shall be deemed to be validated when its output is comparable to the practical test results produced by a given vehicle type during the dynamic manoeuvres of paragraph 5.9. of Appendix 2.  The relationship of activation and sequence of the vehicle stability function in the simulation and in the practical vehicle test shall be the means of making the comparison.

       2.4. The physical parameters that are different between the reference vehicle and simulated vehicle configurations shall be modified accordingly in the simulation.

       2.5. A simulator test report shall be produced, a model of which is defined in Attachment 3 to this appendix, and a copy held by the manufacturer.

Appendix 2 - Attachment 3

         The following is a modified form of Annex 9 – Appendix 3 of UNECE Regulation No. 13-H– UNIFORM PROVISIONS CONCERNING THE APPROVAL OF PASSENGER CARS WITH REGARD TO BRAKING, incorporating supplement 14 to the 00 series of amendments.

VEHICLE STABILITY