scholarly journals Active Return-to-Center Control Based on Torque and Angle Sensors for Electric Power Steering Systems

Sensors ◽  
2018 ◽  
Vol 18 (3) ◽  
pp. 855 ◽  
Author(s):  
◽  
◽  
Keyword(s):  
Electric Power ◽  
Electric Power Steering ◽  
Power Steering ◽  
Active Return

scholarly journals Active Return-to-Center Control Based on Torque and Angle Sensors for Electric Power Steering Systems

2018 ◽  
Author(s):  
Pan-Pan Du ◽  
Hao Su ◽  
Gong-You Tang
Keyword(s):  
Electric Power ◽  
Control Method ◽  
Sudden Change ◽  
Steering Wheel ◽  
Vehicle Speed ◽  
Electric Power Steering ◽  
Complete Control ◽  
Power Steering ◽  
State Switching ◽  
Active Return

This paper presents a complete control strategy of the active return-to-center (RTC) control for electric power steering (EPS) systems. We first establish the mathematical model of the EPS system and analyze the source and influence of the self-aligning torque (SAT). Second, based on the feedback signals of steering column torque and steering wheel angle, we give the trigger conditions of a state switch between the steering assist state and the RTC state. In order to avoid the sudden change of the output torque for the driving motor when the state switches frequently between the steering assist state and the RTC state, we design an undisturbed state switching logic algorithm. This state switching logic algorithm ensures that the output value of the RTC controller is set to an initial value and increases in given steps up to a maximum value after entering the RTC state, and the output value of the RTC controller will reduce in given steps down to zero when exiting the RTC state. This therefore ensures smooth switch control between the two states and improves the driver’s steering feeling. Third, we design the RTC controller, which depends upon the feedback signals of the steering wheel angle and the angular velocity. In addition, the controller increases the auxiliary control function of the RTC torque based on vehicle speed. The experimental results show that the active RTC control method does not affect the basic assist characteristics, which effectively reduces the residual angle of the steering wheel at low vehicle speed and improves the RTC performance of the vehicle.

Sensor Fault-Tolerant Control of Electric Power Steering for Electric Vehicles

ICTE 2015 ◽  
2015 ◽  
Author(s):  
Chen Huang ◽  
Long Chen ◽  
Kaiding Zhang ◽  
Haobin Jiang ◽  
Chaochun Yuan
Keyword(s):  
Electric Power ◽  
Electric Vehicles ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Sensor Fault ◽  
Electric Power Steering ◽  
Power Steering
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