Journal of Zhejiang University SCIENCE A
ISSN 1673-565X(Print), 1862-1775(Online), Monthly

2009   Vol. 10   No. 6   p. 900~908

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

Ying XU^†1, Chang-fu ZONG², Hsiao-hsiang NA², Lei LIU^†‡1

(¹Department of Computer Science and Technology, Jilin University, Changchun 130025, China)
(²State Key Laboratory of Automobile Dynamic Simulation, Jilin University, Changchun 130025, China)
^‡ Corresponding Author
^†E-mail: yxu_yang@126.com; liulei@jlu.edu.cn
Received Mar. 11, 2008; revision accepted Aug. 26, 2008; Crosschecked Mar. 27, 2009

Abstract: 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 performances of an SBW vehicle by reducing the work load of drivers, enhancing the track-holding performance, and improving steering response properties.

Key words: Steer-by-wire (SBW), Steady-state cornering, Steering sensitivity, Dynamical correction
doi:10.1631/jzus.A0820173             CLC number: U46; TP311

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