Road feel feedback module and automobile electric power steering drive-by-wire system formed by same

Abstract

The road feel feedback module comprises a first torque angle sensor which collects the torque and angle of a steering wheel tubular column; a road feel feedback controller which is used for executingroad feel feedback control, driving a road feel simulation motor, driving an intermediate shaft clutch to control and interacting with a steering actuator signal according to the first torque angle sensor signal, the road feel motor feedback signal and the steering actuator feedback signal; an intermediate shaft clutch circuit block which controls the transmission of an intermediate shaft clutch of the whole vehicle clutch; a road feel simulation motor which only executes a road feel feedback controller MCUA signal to output load torque; a drive-by-wire domain connection unit which enables theroad feel feedback controller to communicate with the steering actuator redundant controller through different vehicle buses. The invention further discloses an automobile electric power steering drive-by-wire system. Mechanical transmission control between the upper-layer electronic control unit and the lower-layer actuator can be achieved, the working condition requirement of intelligent driving L3&L4 can be met, and a platform shared by a redundant P-EPS steering system and an automobile electric power steering drive-by-wire system is achieved.

Description

technical field [0001] The invention relates to the field of automotive electronics, in particular to a road sense feedback module. The invention also relates to an automobile electric power steering wire control system with the road feeling feedback module. Background technique [0002] Steer-By-Wire (SBW) system, referred to as SBW system, is of great significance to advanced automatic driving of automobiles and is considered to be one of the key executive components of intelligent driving. According to the "Medium and Long-Term Development Plan for the Automobile Industry" issued by the Ministry of Industry and Information Technology, it is expected that highly and fully autonomous vehicles will enter the market in 2025 and begin to grow rapidly. Steering by wire system is a new steering technology that truly liberates human hands . Compared with the traditional EPS system, the SBW system has added features such as road feeling simulation control, variable transmission ...

AI Technical Summary

Problems solved by technology

[0004] 1. It only supports the automatic driving requirements of SAE-defined intelligent driving level L4 and above, and does not meet the requirements of "driver control avoidance in emergency" when the electronic control system fails at intelligent driving level L3 and below. The real-time response of the upper and lower subsystems that are required by the vast market applications and generally not as good as mechanical transmission;

[0005] 2. From the perspective of vehicle road safety, there are no laws and regulations to support the mass production of the decoupled SBW system. The product design plan can only be implemented after the relevant legal system is perfected;

[0006] 3. In terms of the complexity of the electronic control coordination strategy, the disaster-relief SBW system needs to realize the timing synchronization of the power on and off of the upper and lower subsystems, the status check of the upper and lower steering systems, and the dustproof and waterproof levels of the electrical system are extremely complex and demanding. For any failure scenario , will cause the SBW system to go wrong and the vehicle cannot be used

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