Automobile steering-by-wire redundancy and fault tolerance system and control method

Abstract

The invention discloses an automobile steering-by-wire system SBW with a redundancy and fault tolerance structure and control method, wherein the system comprises a main control chip, a heavy-current circuit, a detection module, a treatment module and an execution motor, characterized in that the system also comprises a standby chip and a standby heavy-current circuit, when fault occurs, the treatment module screens the main control chip and the standby chip and the standby heavy-current circuit are started. The automobile steering-by-wire system also comprises a standby sensor circuit, and the sensor circuit is directly connected with a plurality of sensors of the automobile by the standby connection. The hardware redundancy is combined with the software redundancy to ensure the completeness of the SBW and the entire car loaded CAN communication gives the fault treatment communication and alarm way, thereby the system can be maintained when the fault occurs. The SBW system reliability, safety, real-time communication performance can be increased and optimized, therefore the structure is simple and the industrialization benefit is high.

Description

technical field [0001] The invention belongs to the field of automobiles, in particular to redundant design and fault-tolerant control of steering by wire for automobiles and vehicle-mounted CAN communication. Background technique [0002] The steering performance of a car is one of the main performances of a car. The performance of the steering system directly affects the handling stability of the car. plays an important role. The hydraulic power steering system was the first to be used in automobile steering. The application of electronic technology and electrical technology has revolutionized the steering system. Electrohydraulic power steering system, electric power steering system and wire control electric steering system have appeared. In order to improve the steering performance, the current automobile steering system gradually adopts the electric steering system. [0003] Cars equipped with steer-by-wire systems must consider safety and fault tolerance measures. W...

AI Technical Summary

Problems solved by technology

The above-mentioned technologies can realize the positive and negative rotation of the motor and the real-time monitoring of the motor signal, etc., but their disadvantages are that the design process is complicated, the efficiency is low, and the circuit is affected by the bumps of the car when driving. Take into account collection errors, etc.

Existing patents take mechanical and hardware design into consideration, but do not take into account the practical application of CAN communication in fault handling

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