Document ID: chunk:federal_register_of_legislation:F2025C00108:reg:4:p19
Version: federal_register_of_legislation:F2025C00108
Segment Type: reg
Provision Reference: reg 4 (pt 19/25)
Character Range: 139027–142945

(> 12 tonnes 'GVM' only)*  ≥ 1.25 × Reference Speed
                                                             NC ('Prime Movers' only)**

* excluding any 'Articulated Omnibus', any omnibus specially designed with spaces for standing passengers, and any vehicle designed for off-road use (refer APPENDIX 1 for definition)
** excluding any 'Prime Mover' with four or more axles, and any vehicle designed for off-road use (refer APPENDIX 1 for definition)
"M" means 'Maximum Loaded Test Mass 35/...'
"D" means transmission control in "drive" position appropriate to test speed and engine/motor connected

APPENDIX 3 – Annex 2

    'Vehicle Stability Function' simulation for category ME vehicles with a 'GVM' exceeding 12 tonnes and category NC 'Prime Movers'

 1.                                  Use of the dynamic stability simulation
     1.                            A dynamic stability simulation may only be used when each relevant parameter of the vehicle to be type approved (certified), as listed in clause 2.1 of this annex below, is included in the simulation tool and when the value of each parameter falls within its respective validated range.  The verification must be carried out using each of the manoeuvre(s) specified in clause 6 of Annex 1 to this appendix.

 2.                                  Specification of the dynamic stability simulation
     1.                            The simulation must take into account the main factors that influence the directional and roll motion of the vehicle.
         1.                     The simulation tool (i.e. simulator) and/or the simulation model used for a particular vehicle type must take into account the following vehicle parameters[11] as applicable:
                1.       Vehicle category;
                2.       Gearbox type (e.g. manual, automated manual, semi-automatic, automatic);
                3.       Differential type (e.g. standard or self-locking);
                4.       Differential lock(s) (driver selected);
                5.       'Brake System' type (e.g. air over hydraulic, full air);
                6.        Brake type (e.g. disc, drum (single wedge, twin wedge, S-cam));
                7.       Tyre type (e.g. structure, category of use, size);
                8.       Suspension type (e.g. air, mechanical, rubber, hydraulic);
                9.         Vehicle configuration(s) (e.g. 4x2, 6x2, 6x4 etc., identifying axle functionality (e.g. free running, driven, lifted, steered) and position);
               10.         Steering 'Axle(s)' (working principle);
               11.       Steering ratio;
               12.         Drive 'Axle(s)' (effect on wheel speed sensing and vehicle speed);
               13.     Lift 'Axle(s)' (detection/control and wheelbase change effect when lifted);
               14.       Engine management (communication, control and response);
               15.       Gearbox characteristic(s);
               16.       Drive train option(s) (e.g. retarder, regenerative braking, auxiliary propulsion system);
               17.       Brake characteristic(s);
               18.        'Antilock System' configuration;
               19.        'Wheelbase';
               20.         Track width;
               21.       Centre of gravity height;
               22.       Lateral acceleration sensor position;
               23.     Yaw rate sensor position; and
               24.       Loading.
     1.                            The 'Vehicle Stability Function' must be added to the simulation model by means of:
            1.       A subsystem (software model) of the simulation model; or
            1.       The electronic control box in a hardware-in-the-loop configuration.

 1.                                  Validation of the dynamic stability simulation
     1.                            The validity of the applied simulation and modelling must be