Device and method for recognizing parameter of executive mechanism in electro-hydraulic angular speed servo system

Abstract

The invention discloses a device and a method for recognizing a parameter of an executive mechanism in an electro-hydraulic angular speed servo system. The recognition device consists of a step current signal generator, an electro-hydraulic servo valve, a hydraulic motor, a mechanical load, an angular speed detection sensor, a recording instrument and a hydraulic source. The recognition method comprises the following steps of: inputting a step current signal into the electro-hydraulic servo valve; driving the hydraulic motor and the mechanical load to rotate through the hydraulic source; recording the variation process of the amplitude value of the step current signal and an angular speed signal along with time until the angular speed signal reaches a steady-state value; dividing the amplitude value of the step current signal by the steady-state value of the angular speed signal to acquire the equivalent viscous damping coefficient of the executive mechanism; and multiplying the equivalent viscous damping coefficient by a time value corresponding to the intersection point at which a tangent line at the zero hour position of an angular speed signal curve is intersected with the steady-state value of the angular speed signal to acquire the equivalent inertia of the executive mechanism. By the device and the method, time and labor can be saved when the electro-hydraulic angular speed servo system is debugged, and good static and dynamic properties can be acquired by the electro-hydraulic angular speed servo system.

Description

1. Technical field: [0001] The invention relates to a design method of an electro-hydraulic servo system, and more specifically relates to a parameter identification device and identification method of an actuator in an electro-hydraulic angular velocity servo system. 2. Background technology: [0002] Electro-hydraulic angular velocity servo system is widely used in industry, transportation, scientific research and other departments. In order to obtain excellent angular velocity servo performance, the electro-hydraulic angular velocity servo system must adopt closed-loop control. The electro-hydraulic angular velocity servo system includes an electronic controller, an actuator, an angular velocity detection sensor, and a hydraulic source. The actuator is the actuator, which consists of an electro-hydraulic servo valve, a hydraulic motor, and the mechanical load it carries. Only by qualitative identification of the actuator can we decide what kind of electronic controller ...

AI Technical Summary

Problems solved by technology

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

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