Hydraulic control system and its control method based on labview

Abstract

The invention discloses a hydraulic control system based on LabVIEW, comprising a hydraulic cylinder, a computer equipped with LabVIEW, a proportional amplifier, a directional valve, a displacement sensor, and a serial communication device; the computer sends a control current signal to the proportional amplifier through the serial communication device, and the proportional The amplifier amplifies the current signal and outputs it to the directional valve. The directional valve receives the current signal output by the proportional amplifier to control the flow direction and pressure of the oil in the hydraulic cylinder. The hydraulic rod of the hydraulic cylinder is displaced. The serial communication device sends the voltage signal generated by the displacement change of the hydraulic cylinder to the computer, and the computer accepts the voltage signal and sends the control current signal to the proportional amplifier again. By using the control system and control method of the present invention, the position accuracy and response speed of the hydraulic cylinder can be controlled to be higher than traditional PID control.

Description

technical field [0001] The invention relates to the technical field of electro-hydraulic proportional valve-controlled cylinder pilot control, in particular to a Labview-based electro-hydraulic proportional system hydraulic cylinder control system and a position control method. Background technique [0002] The development of electro-hydraulic proportional technology has an important impact on the control performance of hydraulic equipment. In order to improve the control performance of electro-hydraulic proportion of hydraulic equipment, it is difficult to make breakthroughs only from the level of hydraulic and mechanical hardware. Therefore, it is imperative to develop a hydraulic nonlinear control system and control method with higher control precision. [0003] LabVIEW is a program development environment, similar to C and BASIC development environment, but the significant difference between LabVIEW and other computer languages ​​is that other computer languages ​​use te...

AI Technical Summary

Problems solved by technology

[0002] The development of electro-hydraulic proportional technology has an important impact on the control performance of hydraulic equipment. In order to improve the control performance of electro-hydraulic proportional hydraulic equipment, it is difficult to make breakthroughs only from the level of hydraulic and mechanical hardware.

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