Control of Steer by Wire System for Reference Steering Wheel Torque Tracking and Return-Ability

2018 ◽  
Author(s):  
Jaepoong Lee ◽  
Yi kyongsu ◽  
Kwangil Kim ◽  
Byungrim Lee ◽  
Dongpil Lee ◽  
...  
Keyword(s):  
Steering Wheel ◽  
Steer By Wire ◽  
Wheel Torque ◽  
Wire System

scholarly journals Research on Torque Ratio Based on the Steering Wheel Torque Characteristic for Steer-by-Wire System

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Yandong Han ◽  
Lei He ◽  
Xiang Wang ◽  
Changfu Zong
Keyword(s):  
Force Feedback ◽  
Characteristic Curve ◽  
Transmission Ratio ◽  
Steering Wheel ◽  
Vehicle Handling ◽  
Design Goal ◽  
Torque Transmission ◽  
Steer By Wire ◽  
Wheel Torque ◽  
Wire System

Steer-by-wire system can improve the performance of vehicle handling stability. Removing the mechanical linkages between the front wheels and the steering wheel leads to a key technique of force feedback for steer-by-wire system. In view of the characteristic of variable torque transmission ratio for steer-by-wire system, this paper proposes a method for designing torque ratio based on the steering wheel torque characteristic for steer-by-wire system. It converts the torque ratio design into equivalent assist torque design by analyzing their relationship. It achieves the torque ratio design at different conditions based on the negative equivalent assist torque characteristic curve. Simulations and vehicle experiments are conducted by the proposed method, and the results show that the design goal has been achieved and the steering wheel torque characteristic obtained is very similar to that of the reference car.

Steering Wheel Torque Control of Steer-by-Wire System for Steering Feel

2017 ◽  
Author(s):  
Jaepoong Lee ◽  
Sehyun Chang ◽  
Kwangil Kim ◽  
Bongchoon Jang ◽  
Dongpil Lee ◽  
...  
Keyword(s):  
Torque Control ◽  
Steering Wheel ◽  
Steering Feel ◽  
Steer By Wire ◽  
Wheel Torque ◽  
Wire System

scholarly journals A Hysteresis-Based Steering Feel Model for Steer-by-Wire Systems

2017 ◽  
Vol 2017 ◽  
pp. 1-14
Author(s):  
M. Selçuk Arslan
Keyword(s):  
Mathematical Model ◽  
Steering System ◽  
Steering Wheel ◽  
Hysteresis Model ◽  
Steering Feel ◽  
Proposed Model ◽  
Steer By Wire ◽  
Wheel Torque ◽  
Tire Dynamics ◽  
The Mathematical Model

A mathematical model of steering feel based on a hysteresis model is proposed for Steer-by-Wire systems. The normalized Bouc-Wen hysteresis model is used to describe the steering wheel torque feedback to the driver. By modifying the mathematical model of the hysteresis model for a steering system and adding custom parameters, the availability of adjusting the shape of steering feel model for various physical and dynamic conditions increases. Addition of a term about the tire dynamics to the steering feel model renders the steering wheel torque feedback more informative about the tire road interaction. Some simulation results are presented to establish the feasibility of the proposed model. The results of hardware-in-the-loop simulations show that the model provides a realistic and informative steering feel.

Research on Angle Measurement of Loader's Steering-by-Wire System

2013 ◽  
Vol 373-375 ◽  
pp. 138-141
Author(s):  
Hai Xia Zhao ◽  
Zhi En Lv
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Working Conditions ◽  
Hydraulic System ◽  
Steering System ◽  
Angle Measurement ◽  
Corner Detection ◽  
Steering Wheel ◽  
Steer By Wire ◽  
Wire System

The loader's steer-by-wire system combines the automatic control system and hydraulic system. The system cancels the mechanical or hydraulic connection between the steering wheel and the front wheels, which existed in the original steering system, optimizing the adaptation of the loaders steering systems road feeling to its working conditions, convenient for the integration with other systems, and harmonization of control. This paper puts forward a new measurement of a steer-by-wire system steering angel. It aims at more accurate corner detection, will design to optimize loader's steer-by-wire hydraulic system signal detection, and better meet the actual needs.

scholarly journals Vehicle handling improvements through Steer-by-Wire

2021 ◽  
Author(s):  
Jan Sterthoff ◽  
Roman Henze ◽  
Ferit Küçükay
Keyword(s):  
Objective Evaluation ◽  
Open Loop ◽  
Steering Wheel ◽  
Vehicle Speed ◽  
Characteristic Parameters ◽  
Automated Driving ◽  
Vehicle Handling ◽  
Active Front Steering ◽  
Steer By Wire ◽  
Wire System

AbstractThis paper focuses on handling improvements enabled through Steer-by-Wire systems, which have increasingly become subject of R&D, as they not only offer the potential for improving vehicle handling but also have many advantages in combination with automated driving. Handling improvements through a steering ratio depending on vehicle speed, as well as steering-wheel angle, are known from Active Front Steering systems. A new overall concept is proposed, that also takes into account lateral and longitudinal acceleration as well as steering rate, which are all available signals in a production car. The overall concept is designed in an optimization process to modify a range of established characteristic parameters known from open-loop maneuvers and the objective evaluation of vehicle handling. In this context, validated models for a vehicle and a Steer-by-Wire system are used to obtain reliable results in simulation. Possibilities for tuning the non-linear steering behavior as well as improvements in the dynamic behavior, especially in yaw damping and response time, are demonstrated.

Development of a driving assist system for ultra-compact electric vehicles using a steer-by-wire system: Fundamental consideration of muscle burden and evaluation by a continuous steering operation

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1111-1118
Author(s):  
Daigo Uchino ◽  
Xiaojun Liu ◽  
Hideaki Kato ◽  
Takayoshi Narita
Keyword(s):  
Electric Vehicles ◽  
Gear Ratio ◽  
Steering Wheel ◽  
Steering Angle ◽  
Power Steering ◽  
Steer By Wire ◽  
Steering Torque ◽  
Distance Travel ◽  
Wire System ◽  
Fundamental Consideration

Ultra-compact electric vehicles has excellent environmental performance and are extremely convenient for short-distance travel. However, owing to cabin space limitations, it is difficult to mount power steering. Therefore, there is a need to increase the gear ratio of the rack and pinion to change steering angle because such vehicles need light torque to steer. However, increasing the gear ratio requires more rotations of the steering wheel. Our research group focused on developing a steer-by-wire system (SBWS) that freely controls the steering torque. Although we evaluated the burden when a driver rotates the steering wheel in one direction in a previous study. This study assumed the actual steering operation in an SBWS. And then we evaluate muscle burden when a driver steers with continuous changing of the steering direction.

Research on Variable Steering Ratio of Vehicle Steer-by-Wire System Based on Joystick

2013 ◽  
Vol 336-338 ◽  
pp. 1037-1040 ◽  
Author(s):  
Hong Yu Zheng ◽  
Bing Yu Wang ◽  
Chang Fu Zong
Keyword(s):  
High Speed ◽  
Control Algorithm ◽  
Steering Wheel ◽  
Vehicle Speed ◽  
Vehicle Model ◽  
Steering Angle ◽  
Low Speed ◽  
Steer By Wire ◽  
Wire System

In the steer by wire system of vehicle, a joystick can instead of the steering wheel. A control algorithm based on variable steering ratio is developed on the basis of vehicle speed and joystick steering angle. By verifying the control algorithm with the vehicle model from CarSim, it shows that this proposed algorithm can effective carry out steering intention of drivers, which enhance the steer comfort in low speed driving and steer handling in high speed driving and effectively improve the vehicle maneuverability.

The Variable Steering Ratio for Vehicle Steer by Wire System Using Hyperbolic Tangent Method

2014 ◽  
Vol 575 ◽  
pp. 781-784 ◽  
Author(s):  
Sheikh Muhammad Hafiz Fahami ◽  
Hairi Zamzuri ◽  
Saiful Amri Mazlan ◽  
Sarah Atifah Saruchi
Keyword(s):  
High Speed ◽  
Control Algorithm ◽  
Steering System ◽  
Steering Wheel ◽  
Hyperbolic Tangent ◽  
Steer By Wire ◽  
Tangent Method ◽  
Vehicle Maneuver ◽  
Wire System

In conventional steering system, during the parking maneuver, driver required large turned on the steering wheel to move the fornt tyre. Thus, it will increase the driver burden when turned the steering wheel. The feature of variable steering ratio (VSR), help to reduce driver burden. Moreover, it improves the vehicle maneuver at lower and high speed. This paper, proposed a control algorithm of variable steering ratio (VSR) in vehicle SBW system. The concept of hyperbolic tangent is used where it not only improved the maneuverability at lower speed, but also reduces the driver burden on the steering wheel. To investigate the effectiveness of the proposed VSR algorithm, the result is compared with conventional steering system

scholarly journals Driving Assist System for Ultra-Compact EVs―Fundamental Consideration of Muscle Burden Owing to Differences in the Drivers’ Physiques

Actuators ◽  
2018 ◽  
Vol 7 (3) ◽  
pp. 44 ◽  
Author(s):  
Xiaojun Liu ◽  
Daigo Uchino ◽  
Keigo Ikeda ◽  
Ayato Endo ◽  
Mohamad Peeie ◽  
...  
Keyword(s):  
Automobile Industry ◽  
Reaction Force ◽  
Precision Machining ◽  
Steering Wheel ◽  
Power Steering ◽  
Steer By Wire ◽  
Output Drivers ◽  
Reaction Torque ◽  
Wire System ◽  
Fundamental Consideration

With recent advances in technologies such as those of semiconductors and actuators, easy-to-control compact actuators have been actively applied in various fields such as factory automation and precision machining. In the automobile industry, major manufacturers and venture companies are also concentrating on electric vehicle development. Ultra-compact mobility vehicles, which exhibit an excellent environmental performance and are highly convenient for short-distance movement, are becoming popular. However, owing to cabin space limitations, it is difficult to mount systems such as power steering for assisting steering operations, and such systems are currently not installed in most ultra-compact mobility vehicles. Our research group focused on a steer-by-wire system that does not require a physical connection between the steering wheel and the wheels. Using this system, the steering wheel can be installed without any constraints, and the cabin layout can be easily changed. The reaction torque applied to the steering wheel can be expected to provide an optimum steering feel to each driver by controlling the reaction-force-generating actuator output. Drivers with different heights and arm lengths were then grouped, and arm model calculation and electromyogram measurements obtained during steering operations were used to examine the muscle burden experienced during driving owing to differences in the drivers’ physiques.

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