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Active and passive loading control method of hydraulic test bench

A technology of hydraulic test and control method, which is applied in the direction of fluid pressure actuation device, fluid pressure actuation system test, fluid pressure actuation system components, etc., and can solve the problem of low control accuracy

Active Publication Date: 2020-09-18
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention discloses an active and passive loading control method of a hydraulic test bench, which solves the problem of low control precision of the traditional control method, and can quickly, accurately and stably realize active loading and passive loading

Method used

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  • Active and passive loading control method of hydraulic test bench
  • Active and passive loading control method of hydraulic test bench
  • Active and passive loading control method of hydraulic test bench

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Embodiment Construction

[0054] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0055] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0056] Such as figure 1Shown is the hardware hydraulic principle diagram of the active and passive loading control method of a hydraulic test bench of the present invention, the hydraulic system includes a displacement sensor 1, a working hydraulic cylinder 2, a shaft coupling 3, a pressure sensor 4 with a rod chamber in the loading cylinder, and a passive pressure sensor 4. Proportional overflow valve pressure ...

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Abstract

The invention provides an active and passive loading control method for a hydraulic test bench. The method comprises the following steps of adopting a feedforward and feedback compound control methodto control the loading force in real time, calculating the calculated current value of active and passive proportional relief valves according to the detected set loading force, with the calculated current value as an output value of the feedforward control, filtering the pressure of a rod cavity and the pressure of a rodless cavity, respectively through an adaptive average filter, calculating theactual loading force, and after the difference between the set loading force and the actual loading force, after expert PID calculation, superimposing the output value of the feedforward control andan output value of the feedback control and outputting to the active and passive proportional relief valve to complete the active and passive loading. This method can not only realize the active and passive loading, but also implement closed loop feedback control by means of the loading force, and enhances the accuracy and stability of a control system.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to an active and passive loading control method of a hydraulic test bench. Background technique [0002] As the core component of hydraulic system, hydraulic valve plays a key role in hydraulic transmission and control technology. Hydraulic valves can be divided into directional control valves, pressure control valves, flow control valves, etc. The performance of hydraulic valves directly affects the transmission efficiency, control accuracy, and dynamic response of the hydraulic system, which in turn affects the performance of the whole machine. Therefore, it is necessary to The pressure, flow, dynamic response, dead zone, hysteresis and other parameters of the hydraulic valve are tested and tested. [0003] At present, the more commonly used hydraulic valve test tests are divided into two types, one is to test the basic parameters of the hydraulic valve on a hydraulic t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B19/00F15B13/02F15B21/08
CPCF15B19/00F15B13/02F15B21/08
Inventor 刘凯磊李宇程伟康绍鹏丁力叶霞单文桃巢渊
Owner JIANGSU UNIV OF TECH