Arc-shaped liner motor power-assisted steering system and road sensing control method of the same

Abstract

The invention relates to an arc-shaped liner motor power-assisted steering system and a road sensing control method of the arc-shaped liner motor power-assisted steering system, wherein the arc-shaped liner motor power-assisted steering system comprises a steering mechanical unit, an angle motor, an electronic control unit (ECU), and an arc-shaped liner motor which are sequentially connected; and the arc-shaped liner motor comprises a arc-shaped liner motor primary and a arc-shaped liner motor secondary which are parallelly arranged. A steering output shaft of the steering mechanical unit is arranged by two segments, wherein two segments of the steering output shaft are respectively connected with the upper end and the lower end of the arc-shaped liner motor secondary through a tightly expanded connection sleeve. Meanwhile, the arc-shaped liner motor primary is simultaneously connected with the ECU. The ECU is further connected with a vehicle-mounted optical sensor. The road sensing control method of the arc-shaped liner motor power-assisted steering system comprises the step of correcting real-time traffic status and changeable transmission ratio road sensing, the step of controlling road sensing outer ring and the step of controlling road sensing inner ring. The arc-shaped liner motor directly provides steering assisted power, and initiatively corrects steering road sensing according to road condition information and vehicle driving conditions.

Description

technical field [0001] The invention relates to a power steering system and a road feel control method thereof, in particular to an arc linear motor power steering system and a road feel control method thereof, and belongs to the technical field of electric appliance control. Background technique [0002] At present, the electric power steering system with the function of variable transmission ratio has become the development direction of the automobile power steering system. It provides the power assist torque and the additional rotation angle through the power assist motor and the angle motor to realize the power steering and active steering functions at the same time. However, the steering motor of the existing variable transmission ratio electric power steering system generally uses a DC rotary motor, which needs to be connected to the steering shaft through a worm gear or a planetary gear reduction mechanism, which not only has a complex structure, but also reduces the t...

AI Technical Summary

Problems solved by technology

However, the steering motor of the existing variable transmission ratio electric power steering system generally uses a DC rotary motor, which needs to be connected to the steering shaft through a worm gear or a planetary gear reduction mechanism, which not only has a complex structure, but also reduces the transmission efficiency due to mechanical friction in the transmission mechanism. , large transmission noise and poor dynamic response performance

At the same time, the steering assist strategy of the current variable transmission ratio electric power steering system only determines the assist torque according to the vehicle speed and steering wheel torque, and cannot correct the steering assist according to real-time road condition information and changes in the transmission ratio, nor can it be based on the vehicle's driving Feedback control is performed on the power steering, which may cause the driver to lose the real sense of the steering road, and make a wrong operation to cause an accident

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