Energy storage type steering-by-wire system and fault-tolerant control method

Abstract

The invention discloses an energy storage type steering-by-wire system and a fault-tolerant control method. The energy storage type steering-by-wire system comprises a steering wheel, a steering column, an electronic control unit, a first angle sensor, a second angle sensor, a displacement sensor, a torsion spring, torsion spring locking pliers, a first electromagnetic valve, a second electromagnetic valve, a big gear, a first hydraulicef pipeline, a second hydraulic pipeline, a steering motor, a planet gear train, output shaft locking pliers, a gear rack type steering gear, steering tie rodsand steering wheels. According to the energy storage type steering-by-wire system, energy is stored for the torsion spring in the automobile starting initial stage; when the automobile runs normally,the torsion spring is locked without affecting the operation of the steering-by-wire system; and when the system has a fault, the steering wheels are driven by the steering motor or the torsion springto be straightened according to different fault types so that the automobile is prevented from being out of control due to persistent steering. Compared with an existing redundant steering-by-wire system, the energy storage type steering-by-wire system has the advantages that the system can respond to a common fault of the energy storage type steering-by-wire system by means of the torsion springand the gear; and meanwhile, the system structure is simplified.

Description

technical field [0001] The invention belongs to the technical field of steering-by-wire systems for automobiles, and in particular relates to an energy-storage-type steering-by-wire system and a fault-tolerant control method. Background technique [0002] At present, a variety of new steering systems have emerged in the field of automobile steering, including active steering, differential steering, steer-by-wire, four-wheel steering, etc. Steering-by-wire is the key technology in the process of automobile intelligence. Compared with the traditional steering system, the steer-by-wire cancels part of the mechanical connection, which is replaced by a circuit composed of the electronic control unit ECU, sensors, and signal harnesses. The advantage of steer-by-wire is that it is convenient to control the vehicle dynamics by adjusting the steering angle, because it includes the ECU and the steering motor. But its shortcomings are also obvious. In order to maintain the driver's ro...

AI Technical Summary

Problems solved by technology

The above design of steering-by-wire fault-tolerant function essentially adopts dual ECUs or dual motors. The disadvantage is that the cost and quality of the system are increased, and the mechanism that plays an insurance role is still an electronic device. Compared with the mechanical structure, it is more reliable. sex is still low

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