Nanjing University of Aeronautics and Astronautics

Wanzhong Zhao

Xiaochuan Zhou

Chunyan Wang

Zhongkai Luan

Ziyu Zhang

Jian Zhang

Gang Wu

Changzhi Zhou

Yulin Ye

Yixin Zhong

An Wang

Lijuan Chen

Weihe Liang

Liang Weihe

An active fault tolerance and fault mitigation system based on steer-by-wire dual motors and a mode switching control method thereof are provided. The system includes an acquisition unit, a steering wheel assembly, an ECU control module, a front wheel steering assembly, and a fault tolerance controller () which are sequentially connected. The acquisition unit transmits an acquired vehicle signal to the ECU control module, and then a corresponding compensation strategy is selected by means of a fault tolerance control strategy unit, a yaw rate calculation unit, a stability control unit, and a dual-motor compensation unit to act on a rack and pinion mechanism (). The system and method can perform switching in an active fault tolerance and fault mitigation mode to achieve optimal control of the real-time performance of a vehicle, thereby ensuring the driving performance and higher performance of the vehicle in a field fault condition.

Active fault tolerance and fault mitigation system based on steer-by-wire with dual motors and control method therefor

An electric truck steer-by-wire system and a net-work uncertainty control method therefor. Said system comprises: a master control electric power module (), a slave control electric power module (), a road-sensing motor module (), a steering wheel (), an upper steering column (), a lower steering column (), a rack and pinion steering mechanism (), wheels (), a first steering angle sensor (), a second steering angle sensor (), a steering domain controller (), and a vehicle-mounted CAN network (). By means of the design of the master and slave controllers and actuating mechanisms, the system combines the advantages of steering angle tracking, torque tracking and current tracking, there-by satisfying the steering response requirements and power requirements of the electric truck, and further enhancing the robustness and fault-tolerant performance of the system under a random network time lag.

Vehicle steering-by-wire system and control method thereof

Disclosed are a drive-by-wire chassis cyber-physical system under an intelligent traffic environment and a control method. The system includes: an SoS-level CPS, a system-level CPS, and a unit-level CPS, data transmission is realized between a plurality of unit-level CPSs and one system-level CPS, and data transmission is realized between a plurality of system-level CPSs and one SoS-level CPS. The system integrates a hub motor with a suspension, cancels traditional structures such as an engine and a clutch, and simplifies the structure of a chassis. A motor directly drives a vehicle to run, and different driving, braking or torque is applied to different wheels through four hub motors, so as to meet independent control of the wheels and improve active safety and operational stability.

Chassis-by-wire cyber physical system in intelligent traffic environment, and control method

A multifunctional electric recirculating ball steering system for commercial vehicles and its control method are described. The system comprises three modules: an electric power module, a mechanical transmission module, and a control module. The system introduces a dual-rotor motor and a common power motor, working together to act on the input end of a recirculating ball steering gear. The dual-rotor motor offers high redundancy, increased output torque, and improved reliability for control-by-wire operations. A fork assembly enables synchronous and asynchronous rotation of the dual rotors, achieving both steer-by-wire and electric power steering functions. Leveraging the high reduction ratio capability of the recirculating ball steering gear maximizes power torque and simplifies the system architecture while ensuring reliability in both traditional control and control-by-wire functionalities.

Multifunctional electric recirculating ball steering system for commercial vehicles and control method thereof

The present invention discloses a drive-by-wire electro-hydraulic steering system based on a double-winding motor and a hybrid control method. The steering system includes a steering wheel (), a steering column assembly, a road sense assembly, an electro-hydraulic power-assisted module, a double-winding motor power-assisted module (), a steering control unit, an electromagnetic clutch (), a steering tie rod (), a steering trapezoid () and steering wheels (). The steering system can be switched among various steering work modes according to work conditions of a vehicle, meets steering requirements under various work conditions, uses a work mode that two sets of windings of the double-winding motor work at the same time, and has a motor winding redundancy function. When one set of windings fails, the other set of windings can drive the motor to provide power-assisted torque.

Drive-by-wire electro-hydraulic steering system based on double-winding motor and hybrid control method

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Nanjing, China

Wanzhong Zhao