Full-hardware servo power-assisted steering controller

Abstract

The invention discloses a full-hardware servo power-assisted steering controller, which comprises generation circuits of 12V, +5V and +2.5V, a reference signal generation circuit, a comparator, a bipolar motor driving module, a feedback current detecting circuit and a signal processing circuit, wherein the voltage generation circuit is used for generating voltages of 12V, +5V and +2.5V required by the whole controller, and providing the voltages to each circuit module; the signal processing circuit is used for processing an input signal of the controller and a motor feedback signal through circuits, so as to obtain the required quantity; the signal is output into the comparator; the comparator compares the signal with a triangular wave signal output from the reference signal generation circuit and outputs the signal afterwards; and an obtained PWM (pulse-width modulation) signal is used by the motor driving motor to achieve the purpose of controlling a motor. The signal processing circuit adopts a plurality of combinations, thereby achieving the purpose of correcting the power-assistance characteristic of the vehicle speed; the full-hardware servo power-assisted steering controller is capable of responding rapidly and is not limited by the calculation speed of a processor.

Description

technical field [0001] The invention relates to an electric servo power steering system controller, in particular to an all-hardware servo power steering controller. Background technique [0002] Mechanical hydraulic power assist is our most common power assist method. Due to its mature and reliable technology and low cost, it has been widely popularized. However, due to relying on engine power to drive the oil pump, the energy consumption is relatively high, so a part of the driving power of the vehicle is virtually consumed; the pipeline structure of the hydraulic system is very complicated, and there are a large number of valves for controlling oil. Costs are required; the entire set of oil circuits often maintain a high pressure state, and the service life will be affected. These are the shortcomings of the mechanical hydraulic power steering system. [0003] Electric Power Steering (EPS for short) is a power steering system that directly relies on the motor to provide ...

AI Technical Summary

Problems solved by technology

The defect of this control method is that the signal acquisition is realized through A / D sampling, but the sampling speed and sampling accuracy of A / D sampling will limit the control accuracy of the controller, and the torque signal and vehicle speed signal obtained at the same time need to be obtained through micro A large number of calculations by the processor can get the required output parameters, resulting in obvious lag in the system, unsatisfactory control effect, and even vibration in some cases

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