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Control of Steer by Wire System for Reference Steering Wheel Torque Tracking and Return-Ability
Technical Paper
2018-01-0566
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper proposes a torque tracking algorithm via steer by wire to achieve the target steering feel and proposed a modified friction model to obtain return-ability. A three dimensional reference steering wheel torque map is designed using the measurement data of the steering characteristics of the target vehicle at a transition test and a weave test. In order to track the reference steering wheel torque, a sliding mode control is used in the tracking algorithm. In addition, to achieve return-ability, the modified friction model for steer by wire is used instead of the friction model defined in the reference steering wheel torque map. The modified friction model is composed of various models according to the angular velocity. The angular velocity and the angular acceleration used in the control algorithm are estimated using a kalman filter. A motor is used as the actuators to generate the targeted steering feel and the torque angle sensor (TAS) is used to measure the steering wheel torque and the steering wheel angle. Using the computer simulations, the return-ability of the proposed controller was evaluated with the return test and the tracking performance of the proposed controller was evaluated with the weave test and transition test. By using this proposed control algorithm in steer by wire system, the steering feel close to that of a conventional motor driven steer system has been successful obtained and return-ability has been achieved.
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Citation
Lee, J., kyongsu, Y., Kim, K., Lee, B. et al., "Control of Steer by Wire System for Reference Steering Wheel Torque Tracking and Return-Ability," SAE Technical Paper 2018-01-0566, 2018, https://doi.org/10.4271/2018-01-0566.Also In
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