Available Models
- Humanetics - 046-0000 (ATD Assembly)
Overview
The RID3D dummy is based on modified existing dummy components completed with dedicated RID3D components to fulfill typical whiplash rear and frontal impact responses. The head is based on Hybrid III, the RID3D neck assembly is newly designed, the upper thorax and shoulder are based on THOR, the abdomen, the back pad and the dummy suit are RID3D specific components, the lumbar spine is from an ES-2 dummy, the pelvis is a modified HIII assembly and the arms and legs are (slightly modified) HIII components.
Dummy Features
Head
The head is based on a Hybrid III head with a dedicated skull cap containing a skull cap load cell. Mass and CG are identical to Hybrid III 50th male. The head contains a standard HIII upper neck load cell.
Neck
The neck is a 7 segment construction of aluminium discs, bonded to central rubber discs (Natural Rubber) that form the central column. On the centre line there is a 4 mm steel central cable, running from the top to the bottom interface and is fixed to each disc by means of clamp screws. At the top there is an interface to the upper neck load cell, with soft stops at the OC joint. At the bottom the neck interfaces to the lower neck load cell, which is mounted on an adjustable neck bracket.
At each segment the dynamic response is controlled with tuning buffers in various configurations. For the buffers Butyl rubber is used in the rear and Natural rubber in the front. The maximum bending angle is controlled at each segment individually by means of the front and rear Range of Motion limiting straps.
The head is maintained in upright position with components arranged around the OC joint. The assembly contains a dedicated OC pin and head support arms. The latter are held under tension by left and right spring loaded cables that are running in the left & right rear segment of the neck. The tension on the cable is provided through Bowden cables and a spring cylinder and tension force balancer pulley located in the chest of the dummy.
Shoulder and Thorax
The RID3D shoulder and thorax designs are based on the THOR design. The THOR thorax ribs and shoulder design provides a human like belt interaction during frontal impact and rebound from rear impact.
The thorax is equipped with a T5-T8 flexible element. The term ‘Ramping-up’ is a typical rear impact spine response phenomena and used for the straightening motion of the spine, backward rotation of 1st thoracic vertebra (T1) and sliding up of the occupant on the seat back. The T5-T8 flexible element allows upper thorax motion with regards to the lower thorax. To take advantage of the flexible element, the arm- shoulder- and elbow joint friction must be adjusted to minimal friction. The joint friction of arm and shoulder restricts the flex element motion and ramping up response of this dummy. To encourage sliding against the seat back of the RID3D, the seat¬neoprene-suit friction must be reduced to normal proportions. The dummy should wear a doubled layer of lycra/polyester sports shorts and shirts.
Lower Thorax and Pelvis
The RID3D is designed with a foam Back Pad to give it an anthropometric back profile complying to UMTRI 50th percentile male. The dummy is equipped with a EuroSID-1 spine for increased flexibility and an adjustable lumbar bracket, which allows seating the dummy with zero pre test internal spine moment.
The dummy has a modified Hybrid III pelvis. To encourage ramping up the pelvis is modified with larger openings for femurs, which allow larger leg – pelvis differential motion. The ‘ramping up’ motion would be hindered in case the hip joint range of motion was limited to HIII standard, by the lifting of the complete leg assemblies. Also to encourage ramping-up motion, the hip joint friction screws are removed and threads are blanked.
Arms, Legs, and Elbow
The RID3D arms are slightly modified Hybrid III 50th Male components. The arms are modified in the shoulder joint to minimize the amount of friction that can be established in the shoulder joint. The legs are standard Hybrid III 50th Male components.
