servo valve amplifier

An amplifier and servo valve technology, applied in differential amplifiers, DC-coupled DC amplifiers, and improved amplifiers to reduce nonlinear distortion, etc. Real-time control of demand, reduction of zero drift, and fast response

Active Publication Date: 2018-06-22
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) Due to the influence of the Coulomb friction force of the valve, commonly used servo valve amplifiers tend to have the phenomenon of spool sticking
[0005] 2) Large error interference, resulting in low resolution of the controlled valve
[0006] 3) The phenomenon of drift is obvious, the stability is poor, the requirements for the environment are high, and it is not suitable for outdoor work
[0007] 4) The response speed is fast but the overshoot is generally too large, which is difficult to meet the real-time requirements

Method used

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] A servo valve amplifier of the present invention, the servo valve amplifier is used to connect a real-time controller and an electro-hydraulic servo valve, and it includes: a voltage stabilizing module, a driving module, a flutter signal generating module and an input and output module;

[0027] Such as figure 1As mentioned above, the voltage stabilizing module includes non-polar capacitors C1, C2, C3, C4, C5, C6, C7, C8, C12, C16, polar capacitors C11, C15, C17, Zener voltage regulator diodes D3, D4, D5 , light-emitting diodes D6, D7, resistors R24, R25; among them, one end of non-polar capacitors C1, C2, C3, C4 and the negative pole of Zener diode D3 are connected to the external input +15V, non-polar capacitors C1, The other end of C2, C3, C4, the positive pole of Zener voltage regulator diode D3, one end of non-polar capacitor C5, C6, C7, C8...

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PUM

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Abstract

This invention discloses a servo valve amplifier. The servo valve amplifier firstly receives control analog voltage signals of a real-time controller; with the support of a voltage regulator module, the errors of the control analog voltage signals are firstly reduced in the manner of differential input; after being superposed, differential signals and vibration signals generated by a vibration signal generating circuit are input into a current pump module after being inverted by an inverter module; at last, according to the value of input signals, the voltage signals are transformed into current signals with constant output in a preset enlarging scale by the current pump module; the current signals are not affected by the load; thus, the current signals are output to control an electro-hydraulic servo valve. The amplifier of the invention has the characteristics of reliability, high sensitivity and capability of reducing slow response of the servo valve when controlling the electro-hydraulic servo valve.

Description

technical field [0001] The invention relates to the technical field of electro-hydraulic servo valve control, in particular to a servo valve amplifier used in a wearable power-assisted exoskeleton lower limb electro-hydraulic servo control system. Background technique [0002] The servo valve amplifier is a dedicated controller for the drive and control of the electro-hydraulic servo valve. The function of the servo amplifier is to compare, amplify and calculate the input command signal (voltage) with the system feedback signal (voltage), and output a control current proportional to the deviation voltage signal to the servo valve torque motor control coil to control the servo valve spool Opening size. And through the use of various hydraulic equipment and measurement sensors to form an electro-hydraulic servo system that controls physical quantities such as position, speed, acceleration, and force, such as: valve-controlled cylinders, valve-controlled motors, valve-controll...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/32H03F3/45
Inventor 朱世强张学群裴翔宋扬姚斌朱笑丛陈珊陈庆诚徐业业贺静潘忠强李渠成严水峰韩永红徐兆红
Owner ZHEJIANG UNIV
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