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

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

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

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.336-338.1037 ◽

2013 ◽

Vol 336-338 ◽

pp. 1037-1040 ◽

Cited By ~ 1

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.

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

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.373-375.138 ◽

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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Variable steering ratio control of steer-by-wire vehicle to improve handling performance

Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering ◽

10.1177/0954407019848174 ◽

2019 ◽

Vol 234 (2-3) ◽

pp. 774-782

Author(s):

Xiaodong Wu ◽

Wenqi Li

Keyword(s):

High Speed ◽

Objective Evaluation ◽

Angular Speed ◽

Steering System ◽

Lateral Acceleration ◽

Steering Wheel ◽

Handling Performance ◽

Steer By Wire ◽

Fuzzy Neural ◽

Lane Change Test

To improve vehicle handling performance, a variable steering ratio characteristic for steer-by-wire system is designed. The steering ratio is adjusted by a compensating coefficient according to vehicle longitudinal speed and steering wheel angle. To evaluate the performance of vehicle with variable steering ratio, simulations are conducted based on an objective evaluation index, which consists of quadratic cost functions of vehicle lateral deviation, steering angular speed, vehicle lateral acceleration and roll angle. By using the optimized data from the simulation results, a Takagi-Sugeno fuzzy neural network is designed for the steering ratio control. In order to test and validate the proposed controller, a series of comparison experiments are conducted on a closed-loop driver-vehicle system, including lemniscate curve test and double lane-change test. The results demonstrate that compared with a conventional steering system with fixed steering ratio, the proposed system can not only improve steering agility at low speed and steering stability at high speed, but also reduce driver’s workload in critical driving conditions.

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Mechatronics and Remote Driving Control of the Drive-by-Wire for a Go Kart

Sensors ◽

10.3390/s20041216 ◽

2020 ◽

Vol 20 (4) ◽

pp. 1216

Author(s):

Chien-Hsun Wu ◽

Wei-Chen Lin ◽

Kun-Sheng Wang

Keyword(s):

High Speed ◽

Control Strategies ◽

Control Unit ◽

Autonomous Driving ◽

Front Wheel ◽

Steering Wheel ◽

Output Section ◽

Steer By Wire ◽

Wire System ◽

Remote Driving

This research mainly aims at the construction of the novel acceleration pedal, the brake pedal and the steering system by mechanical designs and mechatronics technologies, an approach of which is rarely seen in Taiwan. Three highlights can be addressed: 1. The original steering parts were removed with the fault tolerance design being implemented so that the basic steering function can still remain in case of the function failure of the control system. 2. A larger steering angle of the front wheels in response to a specific rotated angle of the steering wheel is devised when cornering or parking at low speed in interest of drivability, while a smaller one is designed at high speed in favor of driving stability. 3. The operating patterns of the throttle, brake, and steering wheel can be customized in accordance with various driving environments and drivers’ requirements using the self-developed software. The implementation of a steer-by-wire system in the remote driving control for a go kart is described in this study. The mechatronic system is designed in order to support the conversion from human driving to autonomous driving for the go kart in the future. The go kart, using machine vision, is wirelessly controlled in the WiFi frequency bands. The steer-by-wire system was initially modeled as a standalone system for one wheel and subsequently developed into its complete form, including front wheel steering components, acceleration components, brake components, a microcontroller, drive circuit and digital to analog converter. The control output section delivers the commands to the subsystem controllers, relays and converters. The remote driving control of the go kart is activated when proper commands are sent by the vehicle control unit (VCU). All simulation and experiment results demonstrated that the control strategies of duel motors and the VCU control were successfully optimized. The feasibility study and performance evaluation of Taiwan’s go karts will be conducted as an extension of this study in the near future.

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Handling and Stabilities Calculation and Analysis of Automobile Steer by Wire System Driven by Graphic User Interface

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.97-98.761 ◽

2011 ◽

Vol 97-98 ◽

pp. 761-764

Author(s):

Lei Yan Yu ◽

Zhen Long Wu ◽

Wan Zhong Zhao

Keyword(s):

User Interface ◽

Steering System ◽

Total Variance ◽

Steering Wheel ◽

Graphic User Interface ◽

Dynamics Model ◽

Steer By Wire ◽

Velocity Moment ◽

Steering Torque ◽

Wire System

Automobile steer by wire system (SBW) is a novel steering system. Firstly, the linear four degree of freedom dynamics model with steering torque as the input is built. Then the design ,simulation and multi discipline optimization parameterized platform of SBW is built based on Matlab Graphic User Interface, which can design and simulate steering system performances quickly. Effects of different parameters such as velocity, moment inertia of steering wheel and tire cornering stiffness on handling and stabilities are analyzed. Finally parameters are optimized to minimize the response total variance under torque input and improve the response under steering torque input.

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Development of Estimation Force Feedback Torque Control Algorithm for Driver Steering Feel in Vehicle Steer by Wire System: Hardware in the Loop

International Journal of Vehicular Technology ◽

10.1155/2015/314597 ◽

2015 ◽

Vol 2015 ◽

pp. 1-17 ◽

Cited By ~ 13

Author(s):

Sheikh Muhammad Hafiz Fahami ◽

Hairi Zamzuri ◽

Saiful Amri Mazlan

Keyword(s):

Control Algorithm ◽

Force Feedback ◽

Steering System ◽

Front Axle ◽

Torque Control ◽

Steering Wheel ◽

Hardware In The Loop ◽

Linear Quadratic ◽

Steering Feel ◽

Steer By Wire

In conventional steering system, a feedback torque is produced from the contact between tire and road surface and its flows through mechanical column shaft directly to driver. This allows the driver to sense the steering feel during driving. However, in steer by wire (SBW) system, the elimination of the mechanical column shaft requires the system to generate the feedback torque which should produce similar performance with conventional steering system. Therefore, this paper proposes a control algorithm to create the force feedback torque for SBW system. The direct current measurement approach is used to estimate torque at the steering wheel and front axle motor as elements to the feedback torque, while, adding the compensation torque for a realistic feedback torque. The gain scheduling with a linear quadratic regulator controller is used to control the feedback torque and to vary a steering feel gain. To investigate the effectiveness of the proposed algorithm, a real-time hardware in the loop (HIL) methodology is developed using Matlab XPC target toolbox. The results show that the proposed algorithm is able to generate the feedback torque similar to EPS steering system. Furthermore, the compensation torque is able to improve the steering feel and stabilize the system.

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Analysis on the research method of road sense feedback in steer-by-wire system

Journal of Physics Conference Series ◽

10.1088/1742-6596/2121/1/012031 ◽

2021 ◽

Vol 2121 (1) ◽

pp. 012031

Author(s):

Chuanbin Wei ◽

Lizhu Zhang ◽

You Fu ◽

Faying Xia

Keyword(s):

Automobile Industry ◽

Basic Structure ◽

Steering System ◽

Mechanical Transmission ◽

Driving Experience ◽

The Road ◽

Establishment Method ◽

Steer By Wire ◽

Transmission Structure ◽

Wire System

Abstract Nowadays, the automobile industry is gradually developing towards the trend of electrification and intelligence. Compared with the traditional steering system, the steer-by-wire system cancels the mechanical transmission structure, reduces the space utilization, reduces the probability of damage to the driver caused by the steering system in the collision accident, and improves the driving portability and enhances the driver’s handling experience. The road feeling feedback of steer-by-wire system has the greatest impact on the driver’s driving experience. This paper discusses the research methods of road feeling feedback of steer-by-wire system, introduces the basic structure of road feeling feedback of steer-by-wire system, the basic idea of dynamic modeling, the establishment of simulation model of road feeling feedback, and the establishment method of control strategy and simulation platform of road feeling feedback. Finally, it summarizes and prospects in order to provide basic information and perspectives for the development and research of steer-by-wire system.

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Electronic Control System for Steer by Wire

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2021.35968 ◽

2021 ◽

Vol 9 (VI) ◽

pp. 4161-4166

Author(s):

Eeshan Ranade

Keyword(s):

Electric Power ◽

Engine Performance ◽

Steering System ◽

Electric Power System ◽

Driving Safety ◽

Steering Wheel ◽

Hydraulic Systems ◽

Compact Structure ◽

Steer By Wire ◽

Improved Performance

Automobile industry’s focus is on efficiency, safety and performance has resulted in the rapid introduction of electronics in vehicle safety systems and engine management. Mechanical and Hydraulic systems are now gradually being replaced by electronic controllers to achieve the objectives of optimizing power consumption, improving driver convenience, and maximizing driver safety resulting in an overall improved performance and experience. Vehicle steering systems have transitioned from mechanical to hydraulic power to an electric power assisted steering system and now to the state of the art, Steer by Wire (SbW) system. Traditional mechanical systems included a steering wheel, column, gear, rack and pinion and did not support any power steering. The next generation hydraulic systems were more stable, safer and required comparatively lesser effort. Electric or DC motors drove the Electric Power System addressing the drawbacks of the hydraulic systems especially those related to environment and acoustics with the added advantage of a compact structure and power-on-demand engine performance. By-wire steering technologies was originally introduced in the Concord aircraft in 1970s. The SbW is a steering system with no steering column. The mechanical interface between the steering wheel and the wheels is replaced with by-wire electrical connection/electronic actuators. SbW system has significant advantages in terms of driving safety due to the availability of the steering command in electronic form and the removal of the steering shaft, cruising comfort with driving manoeuvring due to no space constraint and favourable to the environment with the non-usage of hydraulic oils.

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