Electric booster steering system with active turn-right and damp control

Abstract

This invention relates to an electromotive assisting turning system with an active alignment and damp control including an electro-assisting device composed of a torque sensor, a speed sensor, an ECU, a motor and a deceleration unit and a turning device composed of a turning disk, a turning shaft, a turning device, a turning lateral pull rod and a turning wheel characterizing in increasing a corner sensor or a shift sensor in the system used in testing corner signals of the place of the turning shaft running away from the line and the signals are input into an active alignment and damp control module increased in the ECU to compute the alignment and damp control moment together with the speed signals

Description

technical field [0001] The patent of the present invention relates to an electric power steering system (Electric Power Steering System, EPS for short) with active return and damping control functions. Background technique [0002] The original electric power steering system is mainly composed of an electric power assist device and a steering device. figure 1 As shown, the electric power assist device includes: torque sensor, vehicle speed sensor, electronic control unit-ECU, motor and deceleration mechanism, etc. The steering device includes: steering wheel, steering shaft, steering gear, steering tie rod, steering wheel, etc. Depend on image 3 As shown, the torque sensor measures the steering torque applied by the driver on the steering shaft, that is, the steering wheel torque, the vehicle speed sensor measures the current driving speed of the vehicle, and the phase-compensated signal of the steering wheel torque signal and the speed signal of the vehicle speed sensor a...

AI Technical Summary

Problems solved by technology

According to the control algorithm, in order to improve the system's return performance, it may be necessary to apply a larger return torque or damping torque; however, when applying the return torque or damping torque, the value of the steering wheel torque is relatively small (less than The set threshold value is generally selected as 2Nm), so a small torque change may affect the driver's control feel

It can be seen from this that the algorithm cannot take into account the contradiction between the vehicle's returning performance and the driver's handling feel.

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