A three-motor wire control steering system and its control method

A technology of wire-controlled steering and control methods, applied in electric steering mechanisms, steering mechanisms, power steering mechanisms, etc., can solve the problems of slow motor response speed, slow steering response rate, complex structure, etc., to avoid frequent forward and reverse rotation, Strong safety and reliability, the effect of improving the response rate

Active Publication Date: 2020-11-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the control-by-wire system of the Infiniti Q50, when any ECU is detected to have a problem, the standby mode will be activated immediately through a clutch, and the traditional mechanical transmission steering mode will be restored. The problem that the steering system can still work reliably under extreme conditions such as a complete vehicle power failure
Becker et al. proposed an electronically controlled hydraulic steer-by-wire system (patent number US20160068182A1). This device controls the pressure of the steering wheel cylinder through two motor pumps to drive the tie rods on both sides to move left and right, but the response speed of the motor to establish hydraulic pressure is slow. Unreliable factors such as increased oil leakage and air bubbles in the high-pressure oil pipeline, and the direct mechanical connection after the steering-by-wire failure cannot be realized
Yang Lin et al. proposed a hybrid steer-by-wire system (patent number 201610989594.2). In this system, the road sense motor and the power assist motor are separated, and only one set of steering execution motor is used to drive the double-row planetary gear reducer, and then the worm rack drives the horizontal The pull rod moves left and right, and the steering wheel and the steering wheel have real-time controllable force transmission characteristics and angle transmission characteristics. When the system fails, the clutch returns to the mechanical steering state, but the structure of the system is complex and the steering response rate is slow. When frequent changes are required to change the motor direction frequently, the system stability is poor and the service life of the motor is shortened

Method used

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  • A three-motor wire control steering system and its control method
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  • A three-motor wire control steering system and its control method

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Embodiment Construction

[0039] The present invention will be described in further detail below in conjunction with the specific embodiments of the accompanying drawings, but the protection scope of the present invention is not limited thereto.

[0040] figure 1 Shown is a three-motor steering-by-wire steering system that takes into account both response rate and reliability, including a steering wheel module, a steering module, and an ECU control module.

[0041] The steering wheel module is composed of a steering wheel 2, a corner torque sensor 3, a steering rod 4, a road sensor motor 5 and a reducer 7, and is used for the driver to operate and control the steering of the vehicle, and to send the steering wheel angle signal and steering wheel to the ECU control module. The torque signal of the rod, while the road sense motor 5 output torque provides the driver with steering road sense; the steering wheel 2 is connected with the first clutch 8 through the steering rod 4, and the corner torque sensor ...

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Abstract

The invention discloses a three-motor steering-by-wire system and a control method thereof. The system comprises a steering wheel module, a steering module and an ECU control module. The steering wheel module is used for a driver to operate and control a vehicle to turn, the steering module comprises a first clutch, a third motor, a planet gear mechanism, a second clutch, a first motor, a second motor, a steering gear and a steering rack, ECU in the ECU control module reads the vehicle running speed, a corner signal of a steering wheel, a torque signal of a rotating rod, current fed back by all motor controllers and other signals, the vehicle steering working conditions are analyzed and judged, and then running of all motors and on and off of the clutches are controlled; motor power is subjected to coupling and distribution through the planet gear mechanism and then cooperates with on and off of the clutches, switching of different steering modes of the steering system is achieved, andthen the requirements of the different steering working conditions and the safety of the system are met.

Description

technical field [0001] The invention relates to the technical field of steer-by-wire, in particular to a three-motor steer-by-wire system and a control method thereof taking into account both response rate and reliability. Background technique [0002] The development of automobile steering system has gone through the following stages: mechanical steering system, hydraulic power steering system (Hydraulic Power Steering, referred to as HPS), electronically controlled hydraulic power steering system (Electrical Hydraulic Power Steering, referred to as EHPS) and electric power steering system (Electrical Power Steering Steering, referred to as EPS). With the continuous development of control theory and vehicle electronic technology, the steering-by-wire (SBW) technology of automobiles has become a hot research topic at home and abroad. [0003] As the latest generation of steering system, the steer-by-wire system has obvious technical advantages compared with the traditional ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/04
CPCB62D5/0421B62D5/043B62D5/0478
Inventor 王峰张健徐兴陈龙李勇
Owner JIANGSU UNIV
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