Steering-by-wire system based on hydraulic inerter

Abstract

The invention provides a steering-by-wire system based on a hydraulic inerter. The steering-by-wire system comprises a steering wheel, an upper steering column, a gear rack transmission mechanism, the hydraulic inerter, an aligning motor, a front axle, a steering motor, an ECU, an angle sensor and the like. Magnetorheological fluid is integrated to the hydraulic inerter, the viscosity of the magnetorheological fluid is changed by changing the magnetic induction intensity of the periphery of the hydraulic inerter, and accordingly, the purpose of adjusting the damping force of the hydraulic inerter is achieved. The road feel of steering inertia of the steering wheel is simulated through the dynamic inertial effect of the hydraulic inerter, and the steering assistance and feedback force are optimally designed through the adjustable damp characteristic of the magnetorheological fluid in the hydraulic inerter. Compared with traditional steering-by-wire devices, through the steering-by-wire system, the road simulation function of steering wheel is achieved better, and the control stability and driving safety of a vehicle are improved.

Description

technical field [0001] The invention relates to the technical field of automobile steering by wire, in particular to a steering by wire system based on a hydraulic inerter. Background technique [0002] The function of the vehicle steering system is to steer the steering wheels in accordance with the driver's steering commands to obtain overall directional control of the vehicle. The steer-by-wire technology cancels the rigid connection between the steering column and the steering wheels, such as the steering column and the intermediate shaft. Therefore, the steer-by-wire system needs a specific device to realize the simulation of the steering wheel's road feel and the ability to automatically return to the center. [0003] Road feel is the feedback torque from the steering wheel felt by the driver during the driving process of the vehicle, which is equal in magnitude and opposite in direction to the hand torque applied to the steering wheel by the driver. The road feeling ...

AI Technical Summary

Problems solved by technology

There are the following disadvantages in using a motor as a road sensor simulation device: 1. The mechanical connection between the road sensor motor and the steering column is likely to cause impact on the driver's hand and shake the steering wheel, reducing driving comfort; 2. When the road sensor motor fails 3. The road sense motor is used as a road sense simulation device, which has a complex structure, takes up a lot of space, and consumes a lot of energy.

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