Current-balance dual-redundancy control of dual-redundant steering gears in a steer-by-wire system

MI Junnan; WANG Tong; CAI Zhikai; LIAN Xiaomin

doi:10.16511/j.cnki.qhdxxb.2021.21.004

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Journal of Tsinghua University(Science and Technology) ›› 2021, Vol. 61 ›› Issue (9) : 898-905. DOI: 10.16511/j.cnki.qhdxxb.2021.21.004

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Current-balance dual-redundancy control of dual-redundant steering gears in a steer-by-wire system

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Abstract

The safety reliability of steer-by-wire systems (SBW) is the main reason restricting their application; thus, their safety reliability are important. Some studies have proposed safe and reliable dual-redundancy steer-by-wire systems. This paper presents a current-balance dual-redundancy control method for such systems which balances the torques of the dual motors. The system can also cut the power to a faulty motor by reorganizing the control system which reduces the system order so that steering control is maintained after one motor failure. Vehicle tests show that this method provides steering control with balanced motors. The tests also show that the system modifies the control mode after a motor failure to maintain vehicle steering.

Key words

steering system / steer-by-wire / redundancy / safety reliability / steering gear

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MI Junnan, WANG Tong, CAI Zhikai, LIAN Xiaomin. Current-balance dual-redundancy control of dual-redundant steering gears in a steer-by-wire system[J]. Journal of Tsinghua University(Science and Technology). 2021, 61(9): 898-905 https://doi.org/10.16511/j.cnki.qhdxxb.2021.21.004

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