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RISS 인기검색어
- 검색키워드
- 저자 : Qiao-Chu Cai (검색결과 2 건)
- 무료
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A Smart Seat Designed for Crash Safety
Qiao-Chu Cai,Kwang-Hee Lee,Chul-Hee Lee,Chang-Bong Hong 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
When the automobile industry has begun, the safety performance is always an important indicator to evaluate the vehicles. As the vehicle industry has developed, many safety devices is invented to protect the passengers of the car, as air bags, sensing systems, head restraints, impact absorbing interior materials, seat belts and so on. In the present work, the smart seat is controlled by a sensor, which is designed to detect the crash and automatically control the seat of the drivers to move back and lay down the backrest of the seat before crash. The actuating system of the seat is composed by electric motors, screw rods driven by the electric motor and connecting devices. With such electromechanical systems, when the crash happens, the driver will keep at a safer gesture and the direct crash to the steer wheel will be avoided. The design concept with computer aided simulation is introduced in the paper. With the performance checked in LS-DYNA with a dummy crash model, the evaluation of the dummy during the back motion of the seat and the crash is conducted.
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A Simplified Friction Model for Tripod Constant Velocity Joint
Qiao-Chu Cai,Chul-Hee Lee 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
As the tripod constant velocity (TCV) joint offer the lower plunge resistance compared to the ball joint, it has good behavior in noise and vibration performance. But the plunge friction inside the TCV joint will generate an unexpected axial force, which usually causes the vibration and noise. In this present work, a phenomenological TCV joint friction model was used in the numerical models of TCV joint based on ADAMS. This friction model incorporates the change of friction coefficient during the plunge-in and plunge-out motion and describes the rolling and slip friction situation in the TCV joint. So the friction at every parts of the TCV joint can be totally defined. The calculation results from traditional model and the simplified model were compared. The efficiency and accuracy of the simplified model was proved. Since then, the simplified TCV joint model can be used to predict generated axial force of TCV joint and vibration analysis. It will also make effect on the complex system analysis which contains the TCV joint
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