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Digital servo amplifier and amplification method

A servo amplifier and digital technology, applied in the field of servo amplifiers, can solve problems such as complex structure of analog servo amplifiers, high cost of digital servo amplifiers, and inability to implement control algorithms, so as to improve debugging efficiency and accuracy, and eliminate spool cards Astringent, low-cost effects

Inactive Publication Date: 2020-08-25
YANSHAN UNIV
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  • Application Information

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Problems solved by technology

[0004] The prior art has the following disadvantages: First, the structure of the analog servo amplifier is relatively complex, requiring more analog circuit components, and it is impossible to implement a relatively complicated control algorithm, so that the control accuracy is low; second, the cost of the current digital servo amplifier is Higher, which brings a certain pressure to cost control; third, due to the influence of Coulomb friction of the valve, the existing digital servo amplifier is prone to the phenomenon of spool sticking

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  • Digital servo amplifier and amplification method
  • Digital servo amplifier and amplification method

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Embodiment Construction

[0052] In order to make the technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention:

[0053] A digital servo amplifier, applied to the electro-hydraulic servo control system of a six-degree-of-freedom parallel motion platform;

[0054] figure 1 It is a schematic diagram of a digital servo amplifier, which includes a command input module, an ARM module, a DA conversion module, a dither signal module, a power amplification module and a feedback input module;

[0055] The instruction input module is used to receive digital instruction signals from an external computer or controller;

[0056] The feedback input module is used to collect and characterize the action of the servo mechanism, and output an analog feedback voltage signal;

[0057] The ARM module is used to receive th...

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Abstract

The invention discloses a digital servo amplifier, which belongs to the technical field of servo amplifiers, and comprises an instruction input module for receiving a digital instruction signal of anexternal computer or a controller; a feedback input module used for collecting and representing the action of the servo mechanism and outputting an analog feedback voltage signal; an ARM module used for receiving the digital command signal output by the command input module and the analog feedback voltage signal output by the feedback input module, filtering and comparing the digital command signal and the analog feedback voltage signal and converting the digital command signal and the analog feedback voltage signal into digital voltage signals of controlled quantity; a DA conversion module used for receiving the digital voltage signal of the controlled quantity output by the ARM module and converting the digital voltage signal into an analog voltage signal of the controlled quantity; a flutter signal module used for generating a flutter signal; and the power amplification module is used for receiving the analog voltage signal of the controlled quantity output by the DA conversion module, amplifying the analog voltage signal and converting the analog voltage signal into an analog current signal. The digital servo amplifier provided by the invention is high in precision, low in costand simple in circuit, and effectively reduces the interference of coulomb friction force on the valve.

Description

technical field [0001] The invention relates to the technical field of servo amplifiers, in particular to a digital servo amplifier and an amplification method. Background technique [0002] The servo amplifier refers to the DC power amplifier that drives the electro-hydraulic servo valve. The function of the servo amplifier is to amplify and calculate the deviation signal after comparing the command input signal with the feedback input signal, output a control current that has a certain functional relationship with the deviation signal voltage, and input it into the servo motor or servo torque motor coil to drive the servo motor or servo valve. Further reducing this deviation signal allows the system to achieve the desired control accuracy. [0003] The current servo amplifiers are generally analog circuits, using analog circuit components to achieve simple amplification, calculation and filtering of signals; in addition, some servo amplifiers use digital circuits, this t...

Claims

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Application Information

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IPC IPC(8): H03F1/32H03F3/45
CPCH03F1/32H03F3/45
Inventor 刘爽徐晓东赵丁选杨梦轲林振军
Owner YANSHAN UNIV
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