Flutter control method and system of solenoid valve

Abstract

The invention discloses a flutter control method and system of a solenoid valve. The method comprises the following steps: acquiring the current temperature of oil that flows through the solenoid valve; acquiring the effective value of the current target current that controls the displacement of a valve core of the solenoid valve; acquiring the target flutter frequency corresponding to the current temperature according to the correspondence between the flutter frequency and the oil temperature; acquiring the target flutter range corresponding to the current temperature and the effective value of the current target current according to the correspondence of the flutter range, the oil temperature and the effective value of the target current; selecting the actual flutter frequency output corresponding to the frequency range according to the range of the target flutter frequency; selecting the actual flutter range output closest to the target flutter range from a group of actual flutter ranges corresponding to the actual flutter frequency to output. With the adoption of the flutter control method and system of the solenoid valve, a flutter signal can be effectively adjusted on real time during actually using the solenoid valve, thus the solenoid valve and a hydraulic circuit using the solenoid valve can be kept in the best working state on real time, and as a result, the stability and reliability of oil pressure control are ensured.

Description

technical field [0001] The invention relates to the field of solenoid valve control, in particular to a method and system for controlling the chatter of a solenoid valve. Background technique [0002] The displacement or thrust of the spool of the solenoid valve is proportional to the effective value of the target current flowing through the electromagnetic coil. If the effective value of the target current is fixed, the position of the spool is also fixed. In this way, when the effective value of the target current is changed, the valve The core has to overcome static friction to start moving from a static state, so the so-called "sticky" effect occurs, which increases the hysteresis and reduces the response speed and sensitivity. Therefore, it is usually necessary to add a dither signal to the control signal of the controller to apply a small vibration to the spool so that it is always in a vibrating state and convert static friction into dynamic friction, thereby improvin...

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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to solve the above-mentioned problems existing in the existing solenoid valve chatter control, and provide a solenoid valve chatter control method that can adjust the frequency and amplitude of the chatter signal in real time according to the oil temperature and the properties of the hydraulic circuit and system

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