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

Wu, Xiaodong; Li, Wenqi

doi:10.1177/0954407019848174

Cited by 14 publications

(6 citation statements)

References 15 publications

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“…21 The front wheel angle δ f can be found by φ ′ 1 for a known equivalent steering wheel angle and thus equation ( 14) will be meaningless. At this point, the dynamic equations the vehicle considering the steering system in combination with equations ( 11), ( 15), (16), and (17) are as follows:…”

Section: Theoretical Study Of Vehicle Handling Dynamicsmentioning

confidence: 99%

Study of the influence of universal gearing of steering system on vehicle handling stability

Gao,

2023

Science Progress

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The handling stability of a vehicle is a crucial performance aspect. In this study, the focus is on investigating the impact of the universal gearing of the steering shaft on the handling stability of the vehicle. The research involves a theoretical analysis of how the structural parameters of universal gearing affect the handling stability of the vehicle, which is then validated through a series of simulation experiments including swept-sine steering input simulation, constant radius cornering simulation, and cornering with steer release. Evaluation is based on objective indices such as the steering wheel angle, yaw rate, and lateral acceleration. Moreover, the trends of these indices with respect to the phase angle and initial angle of universal gearing are determined. The findings reveal that the steering ratio of the vehicle varies significantly for varying phase angle and initial angle, resulting in different handling performance. The relationship between the phase angle and fluctuation magnitude of steering ratio is particularly noteworthy, while the impact of initial angle is primarily on the phase of steering ratio. Furthermore, within a certain range, changing the structural parameters of the universal gearing has the potential to enhance the handling performance of the vehicle.

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Section: Theoretical Study Of Vehicle Handling Dynamicsmentioning

confidence: 99%

Study of the influence of universal gearing of steering system on vehicle handling stability

Gao,

2023

Science Progress

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“…Electrohydraulic control steering systems typically have large output powers and fast response speeds, making them more suitable for applications in agricultural machinery [5][6][7] . Compared to other forms of electrohydraulic control steering systems, the hydraulic steer-by-wire system has more applicable advantages because it can change the steering ratio of its steering system [8][9][10][11][12] . A good steering system requires its control system to execute steering commands quickly and accurately, and requires a reasonable design of steering transmission mechanism parameters to reduce steering resistance torque and tire wear [13,14] .…”

Section: Introductionmentioning

confidence: 99%

Design and optimization of an automatic hydraulic steer-by-wire system for an agricultural chassis

Jin

Yang

Zhu

et al. 2022

International Journal of Agricultural and Biological Engineering

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To meet the requirements of fast steering at low vehicle speed and slow steering at high vehicle speed, the automatic steering of agricultural chassis must control both the wheel steering angle and the steering angle's angular speed. This study applied hydraulic steer-by-wire technology to the automatic steering control of agricultural chassis. First, the transmission mechanism of the designed steering system was optimized. According to the rule of least squares, aiming at the minimum sum of squares of errors between 10 ideal outer wheel angles and real outer wheel angles, the optimal solution of hole spacing on both sides of the steering hydraulic cylinder piston rod was 925 mm. The outer wheel angle error of the optimized steering mechanism throughout the steering stroke was less than 0.15°. Additionally, a hydraulic steer-by-wire system was developed, and the parameters of its critical components were calculated. Then, the compound control strategy of the steering cylinder piston rod displacement and moving speed was formulated for this automatic steering system. The entire control system included a valve control signal calculation model, an initial velocity calculation model, a correction velocity calculation model, and an attenuation velocity calculation model, and the formulae of each model were deduced. Based on the optimized parameters and the developed control strategy, a simulation model was built in AMESim, and simulation results showed that the proposed control strategy could achieve simultaneous controls of piston rod displacement and speed at different vehicle speeds and loads. The horizontal and vertical displacements of the right wheel center were plotted for typical vehicle speeds and steering commands. The results of this study provided a new idea for the application of hydraulic steer-by-wire technology in the automatic steering of agricultural chassis.

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“…The primary objective of these vehicles is to obtain control capabilities that are not mechanically related to the vehicle's engine, but are sensed through advanced devices and transmitted by electrical signals based on effective mechanisms [26]. Then, the accuracy, performance and efficiency of the machinery in these vehicles is directly related to the positioning systems on roads and tracks [16,22] where DC motors are often used in this case.…”

Section: Introductionmentioning

confidence: 99%

Robust Controller Design for Steer-by-Wire Systems in Vehicles

Akchioui

Fezazi

et al. 2022

Lecture Notes in Electrical Engineering

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The steer-by-wire (SbW) technology enables to facilitate better steering control as it is based on an electronic control technique. The importance of this technology lies in replacing the traditional mechanical connections with steering auxiliary motors and electronic control and sensing units as these systems are of paramount importance with new electric vehicles. Then, this research paper discusses some difficulties and challenges that exist in this area and overcomes them by presenting some results. These results meet the SbW’s robust performance requirements and compensate oscillations from the moving part of the steering rack in the closed-loop system model: modeling, analysis and design. Thus, the issue of robust control for nonlinear systems with disturbances is addressed here. Finally, the results are validated through detailed simulations.

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

Cited by 14 publications

References 15 publications

Study of the influence of universal gearing of steering system on vehicle handling stability

Study of the influence of universal gearing of steering system on vehicle handling stability

Design and optimization of an automatic hydraulic steer-by-wire system for an agricultural chassis

Robust Controller Design for Steer-by-Wire Systems in Vehicles

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