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Chest Clip 3ms

Overview​

Chest clip 3ms is used in the CTI calculation.

Inputs​

Signals:​

  • Resultant Chest Acceleration (G's)

Calculation​

Calculation from SAE 1727 [1],

  1. Filter chest accelerations (CFC = 180)
  2. Linear interpolate to a time step that is a multiple of the time window

-- Single peal and cumulative peak 2. Calculate the longest sustained acceleration over 3ms

Chest_3ms_SingleChest_3ms_Cumulative
3ms Clip Example for Single Peak
3ms Clip Example for Cumulative

Chest_Displacement_Measureing_Sites

Chest Deflection Measurement Sites [1]

Injury Criteria​

Limits for Chest Acceleration and Chest Deflection [2],

ATDChest Acceleration Limit
HIII - M9555
HIII - M5060
HIII - F0560
HIII - 6yo60
HIII - 3yo55
CRABI - 12mo50

References​

[1] "Calculation Guideline for Impact Testing" No. J1727-2015-02 SAE International. SAE Technical Report, 2015.

[2] Eppinger, Rolf, et al. "Development of improved injury criteria for the assessment of advanced automotive restraint systems." (1998).

[3] Eppinger, Rolf, et al. "Supplement: development of improved injury criteria for the assessment of advanced automotive restraint systems: Ii." (2000).