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Suggestions for new BioRID certification procedures

GTR7-02-11. Suggestions for new BioRID certification procedures . By Johan Davidsson, Chalmers University of Technology. Background. A certification procedure should exclude crash test dummies that does not perform as intended in seat performance evaluation tests.

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Suggestions for new BioRID certification procedures

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  1. GTR7-02-11 Suggestions for new BioRID certification procedures By Johan Davidsson, Chalmers University of Technology

  2. Background • A certification procedure should exclude crash test dummies that does not perform as intended in seat performance evaluation tests. • Therefore, dummies should preferably be certified in conditions similar to those used in these seat evaluation tests. • The certification sled pulse should be close to the horizontal acceleration of the BioRID lower torso. • These conditions varies with impact conditions and the seat tested.

  3. Background… • Analysed nine BioRID IIg sled test: • Using new productions seats considered either soft or stiff. • Using the Euro-NCAP 16 kph high and Euro-NCAP 24 kph sled pulses. • Analysis of peak and duration of T8, L1 and Pelvis x-accelerations (local coordinate system).

  4. Results of data analysis

  5. New versus Old certification sled characteristics New Existing Sled Δv = 9 kph Sled acc. duration 30 ms Peak acceleration 17 g • Sled Δv = 16 kph • Sled acc. duration 90 ms • Peak acceleration 10 g

  6. 12 10 8 Calibration sled pulse (g) 6 4 2 0 0 20 40 60 80 100 Time (ms)

  7. Additional • Will require larger pendulum mass and length of sled track. • Head restraint to reduce excessive wear and compression of the rubber blocks in the neck region • Parallel to the existing low speed certification procedure for an interim period

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