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.

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 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.

Application of Steer-by-Wire Technologies on Wheel Loader

2014 ◽  
Vol 1014 ◽  
pp. 76-80
Author(s):  
Yong Ping Zhang ◽  
Shi Jun Luo ◽  
Zhen Fan ◽  
Zhi Guo Shi
Keyword(s):  
Transmission Ratio ◽  
Steering Wheel ◽  
Hydraulic Connection ◽  
Wheel Loader ◽  
Wide Range ◽  
Steer By Wire ◽  
Key Technologies ◽  
Wire System

Steer-By-Wire system connects and controls components in steer system to replace the traditional mechanical or hydraulic connection. The connection between the steering wheel and steered wheel is no more than mechanical or hydraulic. Their kinematics relation is controlled by software, therefore the parameters such as the transmission ratio and road feel can be modified in wide range which has great advantages. This paper introduces the structure and principle of wheel loader Steer-By-Wire system, explains the main advantages and key technologies of Steer-By-Wire system.

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

Design of MRF-Damper-Based Experimental System for Steer-by-Wire Force Feedback Study

2011 ◽  
Vol 101-102 ◽  
pp. 1177-1180
Author(s):  
Chao Bing Huang ◽  
Di Zheng ◽  
Zai He Yu ◽  
Li Yong Hu
Keyword(s):  
Force Feedback ◽  
General Structure ◽  
Experimental System ◽  
Haptic System ◽  
Steer By Wire ◽  
Wire System

In order to meet the requirements of research on steer-by-wire force feedback, a MRF- damper-based experimental system was developed. In the paper, the necessity of the experimental system was analyzed, the general structure and hardware components were introduced. The design of the rotary MRF dampers was illuminated in detail. Experiments showed that the MRF-damper-based haptic system can be used for the study of automobile steer-by-wire system.

Research on Control Strategy of Differential Assisted Steering of Distributed Drive Electric Vehicle

2013 ◽  
Vol 431 ◽  
pp. 241-246
Author(s):  
Yi Chen ◽  
Jun Liu
Keyword(s):  
Electric Vehicle ◽  
Control Strategy ◽  
Characteristic Curve ◽  
Work Load ◽  
Steering Wheel ◽  
Vehicle Speed ◽  
The Road ◽  
Power Steering ◽  
Wheel Torque ◽  
Distributed Drive Electric Vehicle

The distributed drive electric vehicle was studied in this paper. According to the advantages of the controllable and accurate wheel speed and torque the ideal differential assisted characteristic curve was designed under different vehicle speed as well as a control strategy for differential power steering, a vehicle dynamics model based on CarSim/Simulink and simulation experiments were conducted. The experimental results indicated that on the premise to guarantee the road feeling, the control strategy for differential power steering decreased the steering wheel torque, angle and reduced driver's work-load , improved markedly the steering portability of the distributed drive electric vehicle.

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.

Improved handling characteristics of off-road vehicles by applying active control of steering wheel torque

2011 ◽  
Vol 2 (1) ◽  
pp. 66-74
Author(s):  
J. Kis ◽  
L. Jánosi
Keyword(s):  
Active Control ◽  
Research Work ◽  
Rear Wheel ◽  
Steering Wheel ◽  
Road Vehicles ◽  
Vehicle Handling ◽  
Handling Characteristics ◽  
Driving Speed ◽  
Wheel Torque ◽  
High Center

Driving speed of agricultural mobile machines have been increased in the recent years, raisingserious questions about vehicle handling characteristics considering the high center-of-gravity, multi-massconfiguration and rear-wheel-steering of these vehicles. The next generation of steering systems on offroad vehicles will incorporate a steering column mechatronic subsystem which will generate tactilefeedback for operator. This paper presents our research work to utilize steering wheel torque to improveoff-road vehicle handling characteristics.

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.

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