Active Return-to-Center Control Based on Torque and Angle Sensors for Electric Power Steering Systems
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 si...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-03-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/18/3/855 |
| _version_ | 1828149946332741632 |
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| author | Pan-Pan Du Hao Su Gong-You Tang |
| author_facet | Pan-Pan Du Hao Su Gong-You Tang |
| author_sort | Pan-Pan Du |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-11T21:36:22Z |
| format | Article |
| id | doaj.art-31114b79399d4267ba294dc88af8e47b |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T21:36:22Z |
| publishDate | 2018-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-31114b79399d4267ba294dc88af8e47b2022-12-22T04:01:43ZengMDPI AGSensors1424-82202018-03-0118385510.3390/s18030855s18030855Active Return-to-Center Control Based on Torque and Angle Sensors for Electric Power Steering SystemsPan-Pan Du0Hao Su1Gong-You Tang2College of Information Science and Engineering, Ocean University of China, Qingdao 266100, ChinaCollege of Information Science and Engineering, Ocean University of China, Qingdao 266100, ChinaCollege of Information Science and Engineering, Ocean University of China, Qingdao 266100, ChinaThis 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.http://www.mdpi.com/1424-8220/18/3/855electric power steering systemstorque sensorangle sensorstate switchactive return-to-center control |
| spellingShingle | Pan-Pan Du Hao Su Gong-You Tang Active Return-to-Center Control Based on Torque and Angle Sensors for Electric Power Steering Systems Sensors electric power steering systems torque sensor angle sensor state switch active return-to-center control |
| title | Active Return-to-Center Control Based on Torque and Angle Sensors for Electric Power Steering Systems |
| title_full | Active Return-to-Center Control Based on Torque and Angle Sensors for Electric Power Steering Systems |
| title_fullStr | Active Return-to-Center Control Based on Torque and Angle Sensors for Electric Power Steering Systems |
| title_full_unstemmed | Active Return-to-Center Control Based on Torque and Angle Sensors for Electric Power Steering Systems |
| title_short | Active Return-to-Center Control Based on Torque and Angle Sensors for Electric Power Steering Systems |
| title_sort | active return to center control based on torque and angle sensors for electric power steering systems |
| topic | electric power steering systems torque sensor angle sensor state switch active return-to-center control |
| url | http://www.mdpi.com/1424-8220/18/3/855 |
| work_keys_str_mv | AT panpandu activereturntocentercontrolbasedontorqueandanglesensorsforelectricpowersteeringsystems AT haosu activereturntocentercontrolbasedontorqueandanglesensorsforelectricpowersteeringsystems AT gongyoutang activereturntocentercontrolbasedontorqueandanglesensorsforelectricpowersteeringsystems |