Distributed automobile steering-by-wire system and control method

Abstract

The invention provides a distributed automobile line control steering system, which is disposed between a steering wheel and a direction steering machine connected on a wheel, the distributed automobile line control steering system comprises a FlexRay bus, several FlexRay nodes, a rotation angle torque sensor, a road sensing motor, a displacement sensor, and a steering motor, the rotation angle torque sensor and the road sensing motor are both connected with the steering wheel, the displacement sensor and the steering motor are both connected with the steering machine, the rotation angle torque sensor, the road sensing motor, the displacement sensor, and the steering motor are respectively connected with a different FlexRay node in the several FlexRay nodes, all the FlexRay nodes in the several FlexRay nodes are connected with the FlexRay bus. The distributed automobile line control steering system and the control method are advantageous in that, a distributed redundant structure is adopted, and a FlexRay communication protocol is used, facilitating reduction of automobile wire harness, the distributed automobile line control steering system and the control method are also advantaged by good capacity expandable performance, open performance, real time performance, and high reliability, convenient debugging, and facilitation of safety guarantee.

Description

Technical field: [0001] The invention relates to an automobile steering system, in particular to a distributed automobile steering-by-wire system and a control method thereof, belonging to the technical field of automobiles. Background technique: [0002] Automobile steering system is a key factor to improve vehicle handling stability, reduce driver's steering burden and improve the performance of human-vehicle closed-loop control system. Automobile steering system can be divided into hydraulic power steering system, electronically controlled hydraulic power steering system, electric power steering system and wire control steering system according to the different power supply methods. [0003] The fundamental difference between steer-by-wire and other steering systems is that it cancels the mechanical or hydraulic connection device between the steering wheel and the steering wheel, and gets rid of the fixed transmission ratio limitation of gear meshing, so that the system i...

AI Technical Summary

Problems solved by technology

Although foreign countries began to study the steering-by-wire system and FlexRay communication for a long time, until today, they have not been able to combine the two into one in the car.

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