The dynamic behaviour of a road vehicle is a most important part of active vehicle safety. A complete and accurate description of the behaviour of the road vehicle must necessarily involve information obtained from a number of tests of different types.
Any given vehicle, together with its driver and the prevailing environment, forms a unique closed-loop system. BS ISO 7975:2006 specifies an open-loop test procedure to examine the effect of braking on course holding and directional behaviour of a vehicle. Specifically, the method determines how the steady-state circular response of a vehicle is altered by a braking action only.
The open-loop manoeuvre specified in this test method is not representative of real driving conditions, but is useful to obtain measures of vehicle braking behaviour resulting from control inputs under closely controlled test conditions.
BS ISO 7975:2006 contains:
- Normative references
- Terms and definitions
- Principle
- Variables
- Measuring equipment
- Test conditions
- Test methods
- Data evaluation and presentation of results
BS ISO 7975:2006 applies to passenger cars as defined in BS ISO 3833 and to light trucks.