Common use of Neck Injury Criterion Clause in Contracts

Neck Injury Criterion. NIC is determined based on the velocity of the head relative to the T1 vertebra and horizontal acceleration. Each acceleration shall be calculated in meters per second squared (m/s²), and the head’s longitudinal acceleration shall be filtered at CFC 60. The T1 vertebra acceleration is measured on either side, but in the NIC calculation, the average of the left and right accelerations, which have both been filtered at CFC 60, shall be used. This average acceleration is determined as follows: T1left(t) = Acceleration measured by accelerometer on the left side of the T1 vertebra T1right(t) = Acceleration measured by accelerometer on the right side of the T1 vertebra The "relative longitudinal acceleration" between the head and T1 vertebra ( ) shall be generated by subtracting the head longitudinal acceleration ( ) from the left-right average of the T1 vertebra longitudinal acceleration ( ). This acceleration is calculated as follows: The "relative longitudinal velocity" between the head and T1 vertebra ( ) shall be calculated, by integrating the relative acceleration with respect to time, as follows: The NIC channel is then calculated as a combination of relative acceleration multiplied by 0.2, and added to the square of the relative velocity. The calculation is performed using the following equation: The maximum overall NIC value (NICmax) shall be determined, considering only the portion of data from T=0 (start of test) until T-HRC(end) (end of contact between head and head restraint), as follows:

Neck Injury Criterion. NIC is determined based on the velocity of the head relative to the T1 vertebra and horizontal acceleration. Each acceleration shall be calculated in meters per second squared (m/s²), and the head’s longitudinal acceleration shall be filtered at CFC 60. The T1 vertebra acceleration is measured on either side, but in the NIC calculation, the average of the left and right accelerations, which have both been filtered at CFC 60, shall be used. This average acceleration is determined as follows: T1(t) = T1left (t) + T1right (t) T1left(t) = Acceleration measured by accelerometer on the left side of the T1 vertebra T1right(t) = Acceleration measured by accelerometer on the right side of the T1 vertebra The "relative longitudinal acceleration" between the head and T1 vertebra ( x  rel ) shall be generated by subtracting the head longitudinal acceleration ( x x  Head ) from the left-right average of the T1 vertebra longitudinal acceleration (  T1 ). This acceleration is calculated as follows:  rel =  T1 −  Head x x x x The "relative longitudinal velocity" between the head and T1 vertebra ( (V rel ) shall be calculated, by integrating the relative acceleration with respect to time, as follows: x V rel (t) = t x  rel ( )d 0 The NIC channel is then calculated as a combination of relative acceleration multiplied by 0.2, and added to the square of the relative velocity. The calculation is performed using the following equation: The maximum overall NIC value (NICmax) shall be determined, considering only the portion of data from T=0 (start of test) until T-HRC(end) (end of contact between head and head restraint), as follows:

Neck Injury Criterion. NIC XXX is determined based on the velocity of the head relative to the T1 vertebra and horizontal acceleration. Each acceleration shall be calculated in meters per second squared (m/s²), and the head’s longitudinal acceleration shall be filtered at CFC 60. The T1 vertebra acceleration is measured on either side, but in the NIC calculation, the average of the left and right accelerations, which have both been filtered at CFC 60, shall be used. This average acceleration is determined as follows: T1left(t) = Acceleration measured by accelerometer on the left side of the T1 vertebra T1right(t) = Acceleration measured by accelerometer on the right side of the T1 vertebra The "relative longitudinal acceleration" between the head and T1 vertebra ( ) shall be generated by subtracting the head longitudinal acceleration ( ) from the left-right average of the T1 vertebra longitudinal acceleration ( ). This acceleration is calculated as follows: The "relative longitudinal velocity" between the head and T1 vertebra ( ) shall be calculated, by integrating the relative acceleration with respect to time, as follows: The NIC channel is then calculated as a combination of relative acceleration multiplied by 0.2, and added to the square of the relative velocity. The calculation is performed using the following equation: The maximum overall NIC value (NICmax) shall be determined, considering only the portion of data from T=0 (start of test) until T-HRC(end) (end of contact between head and head restraint), as follows:

Neck Injury Criterion. NIC is determined determxxxd based on the velocity of the head relative to the T1 vertebra and horizontal acceleration. Each acceleration shall be calculated in meters per second squared (m/s²), and the head’s longitudinal acceleration shall be filtered at CFC 60. The T1 vertebra acceleration is measured on either side, but in the NIC calculation, the average of the left and right accelerations, which have both been filtered at CFC 60, shall be used. This average acceleration is determined as follows: T1(t) = T1left (t) + T1right (t) T1left(t) = Acceleration measured by accelerometer on the left side of the T1 vertebra T1right(t) = Acceleration measured by accelerometer on the right side of the T1 vertebra The "relative longitudinal acceleration" between the head and T1 vertebra ( x γ rel ) shall be generated by subtracting the head longitudinal acceleration ( x x γ Head ) from the left-right average of the T1 vertebra longitudinal acceleration ( γ T1 ). This acceleration is calculated as follows: γ rel = γ T1 − γ Head x x x x The "relative longitudinal velocity" between the head and T1 vertebra ( (V rel ) shall be calculated, by integrating the relative acceleration with respect to time, as follows: x V rel (t) = t x ∫γ rel (τ )dτ The NIC channel is then calculated as a combination of relative acceleration multiplied by 0.2, and added to the square of the relative velocity. The calculation is performed using the following equation: The maximum overall NIC value NIC(t) = 0.2 *γ rel (NICmaxt) shall be determined, considering only the portion of data from T=0 +[V rel (start of test) until T-HRC(end) (end of contact between head and head restraint), as follows:t)]2