Electronic control semi-active suspension ECU (electronic control unit) system based on magnetorheological fluid shock absorber

Abstract

The invention relates to an electronic control semi-active suspension ECU (electronic control unit) system based on a magnetorheological fluid shock absorber. An ECU power management module and a fault diagnosis and safety processing module are connected with a processor, a signal acquisition module consists of an acceleration sensor and a signal conditioning circuit, signals of the sensor are inputted to the processor after being amplified and filtered, a magnetorheological fluid shock absorber driving control module consists of an actuator power management, PWM (pulse-width modulation) driving output control and actuator current feedback circuit and used for amplifying PWM waveforms outputted by the processor, outputting target current to control electromagnetic coils of the magnetorheological fluid shock absorber, and feeding actual current of the electromagnetic coils to the processor, and the outputted current is controlled and compensated in a closed-loop manner so that the actual working current is close to a target value. The electronic control semi-active suspension ECU system has the advantages that the electronic control semi-active suspension ECU system based on the magnetorheological fluid shock absorber is high in response speed and output precision and low in power consumption, has a communication function and is adaptive to automobile-level complicated working conditions and environments.

Description

technical field [0001] The invention relates to an electronically controlled semi-active or active suspension ECU controller, mainly an electronically controlled semi-active suspension ECU system based on a magneto-rheological fluid shock absorber. Background technique [0002] Magnetorheological Fluid (MR Fluid for short) is a kind of intelligent material mixed with tiny soft magnetic particles with high magnetic permeability and low magnetic hysteresis and non-magnetic permeable liquid. Under the action of an external magnetic field, the rheological properties of the magnetorheological fluid change, and change with the change of the external magnetic field intensity. Because the rheology of magnetorheological fluid under the action of a magnetic field is instantaneous and reversible, and its shear yield strength after rheology has a stable corresponding relationship with the magnetic field strength, it is widely used in automobiles, buildings, bridges, machinery, etc. and...

AI Technical Summary

Problems solved by technology

In the prior art, an 8-bit single-chip microcomputer is used as the ECU controller, but the sampling resolution of the input signal is not high, the processor has a low throughput and a low main frequency resulting in a low response speed, the PWM drive control precision is not high, and it is impossible to realize the software and hardware phase. Combined fault diagnosis and system safety monitoring measures

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