Torque Neutrality for Active Steering Systems

2012 ◽  
Vol 134 (5) ◽  
Author(s):  
Jonas Müller
Keyword(s):  
Transfer Functions ◽  
Steering System ◽  
Experimental Results ◽  
System Model ◽  
Steering Wheel ◽  
Control Law ◽  
Feed Forward Control ◽  
Power Steering ◽  
Active Steering ◽  
Active Steering System

This paper outlines a method for using an active steering system with two electrical actuators (one power-steering actuator and one superposition actuator) in order to manipulate the steering rack position without torque feedback to the steering wheel. To this effect, the power-steering actuator is used to implement a feed-forward control in order to compensate for the inertial effect introduced by the angle superposition. A rudimentary steering system model is used to derive the relevant transfer functions and assemble the control law for the superposition actuator. Experimental results of a research project at the BMW Group are included.

Research on an Electric Power Steering System with Active Steering Ability

2013 ◽  
Vol 312 ◽  
pp. 679-684
Author(s):  
Jun Wei Qiao ◽  
Jin Fa Xie ◽  
Zhen Wei Yang
Keyword(s):  
Electric Power ◽  
High Speed ◽  
Steering System ◽  
Steering Wheel ◽  
Electric Power Steering ◽  
Power Steering System ◽  
Low Speed ◽  
Power Steering ◽  
Active Steering ◽  
Electric Power Steering System

To introduce a new type of electric power steering system, the structure and working principle of the system were introduced, and the models of the car, the tire and the steering system were established. The assist characteristic of the power steering and the ideal steering ratio were also designed and optimized. At last, the simulation tests were carried out. The double planetary wheel mechanism is the most important component of the system. With this mechanism, the system synthesizes the force or motion from the steering wheel and the motor. So the power steering and a small steering ratio can be provided at a low speed, and the steering ratio can be changed initiatively at a medium or high speed. Whats more, the steering ability still exists when there is a fault in the system. The simulation results show this steering system can effectively improve the steering portability, low-speed sensitivity, and the vehicle handling stability.

scholarly journals Experimental Study on Antivibration Control of Electrical Power Steering Systems

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Zhaojian Wang ◽  
Hamid Reza Karimi
Keyword(s):  
Control Strategy ◽  
Controller Design ◽  
Electrical Power ◽  
Steering System ◽  
Steering Wheel ◽  
Bench Test ◽  
Power Steering ◽  
Motor Controller ◽  
Hydraulic Steering ◽  
Wheel Vibration

We focus on the antivibration controller design problem for electrical power steering (EPS) systems. The EPS system has significant advantages over the traditional hydraulic steering system. However, the improper motor controller design would lead to the steering wheel vibration. Therefore, it is necessary to investigate the antivibration control strategy. For the implementation study, we also present the motor driver design and the software design which is used to monitor the sensors and the control signal. Based on the investigation on the regular assistant algorithm, we summarize the difficulties and problems encountered by the regular algorithm. After that, in order to improve the performance of antivibration and the human-like steering feeling, we propose a new assistant strategy for the EPS. The experiment results of the bench test illustrate the effectiveness and flexibility of the proposed control strategy. Compared with the regular controller, the proposed antivibration control reduces the vibration of the steering wheel a lot.

scholarly journals A Review Paper on Electric Assisted Steering System for Automobiles

2021 ◽  
Vol 7 (03) ◽  
pp. 54-56
Author(s):  
Prof. Nivedita, Pall Choudhury, Ashutosh Jagdale, Ravi Ghule and Simran Shaikh
Keyword(s):  
Steering System ◽  
Steering Wheel ◽  
Electric System ◽  
Human Needs ◽  
Construction Design ◽  
Active Steering ◽  
Hydraulic Steering ◽  
Steering Effort ◽  
Steering Torque ◽  
Electronic Elements

Electric Assisted Steering system is an Electric System, which reduces the amount of steering effort by directly applying the output from the electric motor to the steering system.In this system the mechanical link between the steering wheel and road wheels of an automobile are replaced by a control system consisting of sensors, actuators and controllers seem to offer great advantages such as enhanced system performance, simplified construction, design flexibility etc.It offers greater vehicle safety by adapting variable steering ratios to human needs, filtering drive train influences and even adjusting active steering torque in critical situations. In addition, it can make cars even lighter and more fuel efficient when compared to those using hydraulic steering systems. The central electronic elements of today’s steering systems are modern microcontrollers

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