1 / 10

ES2- Concerns

ES2- Concerns. OICA 31st session of GRSP May 2002. ES2 - Concerns. EEVC WG12 has reported on the « Development and evaluation of the ES2 dummy » This report raises questions on some remaining key-points. ES2 - Concerns. Variation of performance criteria between ES1 and ES2

aram
Download Presentation

ES2- Concerns

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ES2- Concerns OICA 31st session of GRSP May 2002

  2. ES2 - Concerns • EEVC WG12 has reported on the « Development and evaluation of the ES2 dummy » • This report raises questions on some remaining key-points

  3. ES2 - Concerns • Variation of performance criteria between ES1 and ES2 • Directional sensitivity • Inter-rib homogeneity • Thorax damping characteristics and stiffness • Interactions between body segments

  4. ES2 - ConcernsVariation of performance criteria • CEVE report: ES2 criteria has lower criteria than ES1 in biofidelity tests • It is the contrary in pendulum tests • Only 7.6 m/s sled tests are fully exploitable. Nevertheless, results on ES1 tests are highly spread • In 10.3 m/s sled tests, maximum deflection is always reached for the uppermost rib

  5. ES2 - ConcernsDirectional sensitivity • Possible increase of deflection on ES2 at negative angles: 10% • No data on ES1 at negative angles

  6. ES2 - ConcernsInter-rib homogeneity • Unexpected lack of inter-rib homogeneity not explained • Uppermost rib deflection often increase with ES2 whilst the mean deflection decreases; criteria is based on the higher deflection

  7. ES2 - ConcernsThorax damping characteristics and stiffness • Friction is eliminated in ES2 and compensated by increasing tuning spring • ES2 thorax stiffer and less damped

  8. ES2 - ConcernsThorax damping characteristics and stiffness • The observed frequency in some FST is a consequence of elastic rebound of ribs • This leads to high VC value due to high velocity at high deflections

  9. ES2 - ConcernsInteractions between body segments • ES2 pelvis stiffness is lower • ES2 pelvis is highly sensitive to angle • Effects on thorax have to be investigated

  10. ES2 - ConcernsConclusions • Does ES2 improve real safety ? • Agreement on back plate • Need for further explanations on other key-points

More Related