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Investigations on control algorithm of steady-state cornering and control strategy for dynamical correction in a steer-by-wire system

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第6期10卷 900-908页

作者： Ying XU Chang-fu ZONG Hsiao-hsiang NA Lei LIU Department of Computer Science and Technology Jilin University Changchun 130025 China state Key Laboratory of Automobile Dynamic Simulation Jilin University Changchun 130025 China

To improve the handling performance of a steer-by-wire (SBW) vehicle, a series of control logics are proposed. Firstly, an algorithm for enhancing the maneuvering in steady-state cornering is presented. On this basis, two categories of control strategies are used to dynamically correct and compensate the transient state steering responses and vehicle behaviors. Simulator tests including subjective evaluations and virtual field tests are both conducted to make comprehensive investigations on the series of control logics. The subjective evaluations demonstrate that the SBW vehicle with a specifically selected value of steering sensitivity tends to be more desirable for driving than a conventional one in which a fixed steering ratio exists. The virtual field tests indicate that the control strategies for dynamical correction and compensation could effectively improve the handling per-formances of an SBW vehicle by reducing the work load of drivers, enhancing the track-holding performance, and improving steering response properties.

关键词： Steer-by-wire (SBW) steady-state cornering Steering sensitivity Dynamical correction

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Modelling and Turning Characteristics Analysis of Dual-Steering Multi-Axle Vehicles

Modelling and Turning Characteristics Analysis of Dual-Steer...

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作者： Yun-chao WANG Zhi-chao HU Heng DU College of Mechanical and Energy Engineering Jimei University School of Mechanical Engineering and Automation Fuzhou University

Multi-axle vehicles with dual steering systems（DSS）,which include a hydraulicassisting steering link mechanism system for front axles and an electrohydraulic active-steering system（EHASS） for rear axles,become the development trendency of multi-axle ***,until now,no attempt has been made with regard to the mathematical model for multiaxle vehicles with *** introducing two ratios of wheel steering angle to first wheel angle for the two steering systems,the model of multi-axle vehicles with DSS was deduced based on the Newton’s second *** relevant experiment was carried and validate the model *** comparison between the vehicles with DSS and those with EHASS show that vehicles with DSS have an approximate mobility and stronger cornering stability.

关键词： Multi-axle steering vehicle Dual steering systems steady-state cornering Turning characteristics

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Development of Twist Beam Suspension

Development of Twist Beam Suspension

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2015中国汽车工程学会年会

作者： Zhang Kun Huang Xin Liu Yu Changan Auto Global R＆D Center of Changan Automobile Co. LtdChassis Performance Developing Institute

A B class economical car equipped with front Macpherson and rear twist beam is investigated,the aim is developing a twist beam to achieve the design requirements of roll angle gradient,understeer gradient when cornering,while ensuring its structural integrity is achieved with a reduction in its *** order to perform the optimization process,the targets at a vehicle level based on the benchmarked vehicle are defined,and then the targets are cascaded to the system and parts levels,by redesigning the cross beam sectional properties,the structure optimization is carried out without changing twist beam axle hardpoint locations’.

关键词： twist beam cross beam sectional properties target setting structure optimization steady-state cornering

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