New Design of Reduction Device of Column Electric Power Steering System

2013 ◽  
Vol 712-715 ◽  
pp. 2188-2191
Author(s):  
Yu Long Wu ◽  
Cheng Qun Li ◽  
Xiao Lei Dong

EPS is the abbreviation of electric power steering system and reduction device is one of the key parts of the EPS. It determines whether the steering system works normally. This paper studies the deceleration mechanism of EPS and in accordance with its assistance characteristic, designs a new deceleration device that Cycloid steel ball planetary reducer, and gives the specific design and implementation of the program. Combined with steering portability needs, this paper gives the specific reduction ratio calculation and the deceleration mechanism design.

Author(s):  
Manel Allous ◽  
Kais Mrabet ◽  
Nadia Zanzouri

Electric power steering is an advanced steering system that uses an electric motor to improve steering comfort of the car. As a result, the failures in the electric motor can lead to additional fault modes and cause damage of the electric power steering system performance. Hence, to ensure the stability of this latter, the present paper proposes a new method to reconfigure the fault control. A novelty approach of fast fault estimation based on adaptive observer is also proposed. Moreover, to guarantee optimal and fast control, a fault-tolerant control based on inverse bond graph modeling is designed to construct the behavior of the nominal system. The simulation and the experimental results on a real electric power steering system reveal the importance of the control strategy and show that the proposed approach works as intended.


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