Document ID: chunk:federal_register_of_legislation:F2005L03990:front:0:p10
Version: federal_register_of_legislation:F2005L03990
Segment Type: other
Provision Reference: 
Character Range: 25167–27815

higher impact speed and the vehicle met the requirements, the test shall be considered satisfactory.
5. MEASUREMENTS TO BE MADE ON DUMMY IN FRONT SEATS
5.1. All the measurements necessary for the verification of the performance criteria shall be made with measurement systems corresponding to the specifications of annex 8.
5.2. The different parameters shall be recorded through independent data channels of the following CFC (Channel Frequency Class):
5.2.1. Measurements in the head of the dummy
 The acceleration (a) referring to the centre of gravity is calculated from the triaxial components of the acceleration measured with a CFC of 1000.
5.2.2. Measurements in the neck of the dummy
5.2.2.1.  The axial tensile force and the fore/aft shear force at the neck/head interface are measured with a CFC of 1000.
5.2.2.2.  The bending moment about a lateral axis at the neck/head interface are measured with a CFC of 600.
5.2.3.  Measurements in the thorax of the dummy
 The chest deflection between the sternum and the spine is measured with a CFC of 180.
5.2.4.  Measurements in the femur and tibia of the dummy
5.2.4.1.  The axial compressive force and the bending moments are measured with a CFC of 600.
5.2.4.2.  The displacement of the tibia with respect to the femur is measured at the knee sliding joint with a CFC of 180.
6. MEASUREMENTS TO BE MADE ON THE VEHICLE
6.1. To enable the simplified test described in annex 7 to be carried out, the deceleration time history of the structure shall be determined on the basis of the value of the longitudinal accelerometers at the base of the "B" pillar on the struck side of the vehicle with a CFC of 180 by means of data channels corresponding to the requirements set out in annex 8;
6.2. The speed time history which will be used in the test procedure described in annex 7 shall be obtained from the longitudinal accelerometer at the "B" pillar on the struck side.

Annex 4

DETERMINATION OF PERFORMANCE CRITERIA

1. HEAD PERFORMANCE CRITERION (HPC)
1.1. This criterion is considered to be satisfied when, during the test, there is no contact between the head and any vehicle component.
       1.2. If that is not the case, a calculation of the value of HPC is made, on the basis of the acceleration (a), measured according to paragraph 5.2.1. of annex 3 by the following expression:
 in which:
1.2.1. the term 'a' is the resultant acceleration measured according to paragraph 5.2.1.of annex 3 and is measured in units of gravity, g (1 g = 9,81 m/s2)
1.2.2.  if the beginning of the head contact can be determined satisfactorily, t1 and t2 are the two time instants, expressed in seconds,