A multi-functional dual-motor coupled active steering system for commercial vehicle and a control method thereof

Through the integrated design of double-row planetary gears and electromagnetic actuators, the multi-functional dual-motor coupled active steering system for commercial vehicles achieves torque superposition under normal working conditions and variable transmission ratio and active anti-rollover under extreme working conditions. This solves the problems of insufficient power and safety reliability in commercial vehicle steering systems and simplifies the control system.

CN120288120BActive Publication Date: 2026-06-09NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Filing Date
2025-05-07
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Commercial vehicle steering systems suffer from insufficient power, lack of safety and reliability, and complex control systems. A single motor cannot fully meet the torque requirements, traditional dual-motor steering systems cannot achieve variable transmission ratio control, and three-motor systems increase safety hazards and control complexity.

Method used

It adopts a deep integration design of double-row planetary gears and electromagnetic actuators. Under normal working conditions, the electromagnetic actuator is locked, and the auxiliary motor achieves torque superposition through the double-row planetary gears. Under extreme working conditions, the electromagnetic actuator is disengaged, and the auxiliary motor and the main motor control the rotation angle and torque respectively, realizing variable transmission ratio and active anti-rollover.

Benefits of technology

It achieves improved portability under normal operating conditions with dual-motor power-assisted coupling, and active anti-rollover control under extreme operating conditions, reducing system control complexity and meeting the power requirements and safety reliability of commercial vehicles.

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    Figure CN120288120B_ABST
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Abstract

The application discloses a kind of commercial vehicle multifunctional double motor coupling active steering system and its control method, comprising: the angle of collection vehicle steering wheel, torque signal;According to the signal calculated, vehicle stability margin is calculated, and the state of electromagnetic actuator is determined;Limiting the transmission ratio required under working condition is calculated;The angle value required by auxiliary motor is calculated, and control signal is sent to auxiliary motor;The assist torque value required by main motor is calculated, and control signal is sent to main motor;The torque distribution value of auxiliary motor and main motor under ordinary working condition is calculated, and is sent to auxiliary motor and main motor respectively;Output corresponding torque or angle, complete vehicle steering.The application can improve the lightness of steering at low speed under ordinary working condition by double motor assist coupling;Under limiting working condition, main motor is assisted alone, and auxiliary motor is compensated to driver steering angle by double-row planetary gear module, can realize stepless variable transmission ratio, realizes active rollover control.
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