A dual-input characteristic test system for servo valve

Abstract

A dual-input characteristic testing system for a servo valve, including a measurement and control system and a test bench. The servo valve to be tested is installed on the working table of the test bench. An actuator is installed on the test bench, and the servo valve to be tested is driven by a loading signal. The actuator generates a displacement proportional to the loading signal, and feeds back to the mechanical feedback displacement input terminal of the servo valve under test; the measurement and control system includes the digital logic circuit of the lower computer and the human-computer interaction interface of the upper computer, and the user inputs the loading through the human-computer interaction interface of the upper computer. signal, the digital logic circuit of the lower computer converts the loading signal into a constant current source, applies it to the electric input terminal of the servo valve under test, and collects the displacement of the mechanical feedback displacement input terminal of the servo valve under test, and feeds it back to the human-computer interaction interface of the upper computer for further processing. Display, for the user to judge whether the dual-input characteristics of the servo valve meet the requirements. The invention can realize the function of separately testing the double-input characteristic of the servo valve, and achieves the purpose of judging the performance of the double-input characteristic.

Description

technical field [0001] The invention relates to a dual-input characteristic testing system for a servo valve, which belongs to the technical field of hydraulic control. Background technique [0002] The electro-hydraulic servo valve is used in the hydraulic control system and is the core control element of the system for closed-loop control of position, pressure or speed. Electromechanical dual-input servo valve is a type of electro-hydraulic servo valve, which is often used in aerospace and aviation position vector servo control systems. Its dual-input characteristics include: dual-input hysteresis, dual-input gain, dual-input displacement, and dual-input symmetry And other characteristic indicators, directly affect the performance indicators of the servo system. The dual-input characteristic index cannot be tested separately in the ordinary servo valve performance debugging test system, and the servo valve and the servo system need to be tested in the joint test, so the p...

AI Technical Summary

Problems solved by technology

The dual-input characteristic index cannot be tested separately in the ordinary servo valve performance debugging test system, and the servo valve and the servo system need to be tested in the joint test, so the performance of the index is unpredictable

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