Recognition device and method for parameters of execution mechanism in electro-hydraulic linear velocity servo system

Abstract

The invention discloses a recognition device and method for parameters of an execution mechanism in an electro-hydraulic linear velocity servo system. The recognition device comprises a step current signal generator, an electro-hydraulic servo valve, a hydraulic cylinder, a mechanical load, a liner-velocity detection sensor, a recorder and a hydraulic source; and the recognition method comprises the steps of: inputting step current signals into the electro-hydraulic servo valve, and detecting the motion liner velocity of the mechanical load; recording the varying process of the step current signals and linear velocity signals with the time till the steady-state value of the linear velocity signal is achieved; dividing the amplitude of the step current signals by the steady-state value of the linear velocity signals to obtain an equivalent viscous damping coefficient of the execution mechanism; and multiplying the equivalent viscous damping coefficient by a time value corresponding to a state that the 0.632 times of the steady-state value of the linear velocity signals is reached to obtain an equivalent mass of the execution mechanism. By means of the recognition device and method disclosed by the invention, the regulation of the parameters of a controller of the electro-hydraulic linear velocity servo system is timesaving and laborsaving, and the electro-hydraulic servo system can achieve better static and dynamic properties.

Description

Technical field: [0001] The invention relates to a design method of an electro-hydraulic servo system, and more specifically relates to a quantitative identification device and identification method of actuator parameters in a linear velocity servo system of a valve-controlled hydraulic cylinder. Background technique: [0002] Electro-hydraulic linear speed servo system is widely used in industry, transportation, scientific research and other departments. In order to obtain excellent linear velocity servo performance, the electrohydraulic linear velocity servo system must adopt closed-loop control. The electro-hydraulic line speed servo system includes an electronic controller, an actuator, a line speed detection sensor, and a hydraulic source. The actuator is composed of electro-hydraulic servo valve, hydraulic cylinder, and its mechanical load. Only by qualitative identification of the actuator can we decide what kind of electronic controller to design, and only by quant...

AI Technical Summary

Problems solved by technology

This results in blind adjustment of the control parameters of the electronic controller, time-consuming and laborious debugging of the electro-hydraulic linear speed servo system, and the performance of the linear speed servo is difficult to meet the engineering requirements.

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