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Hydraulic-motor angular-displacement digital servo control system and method thereof

A digital control, hydraulic motor technology, applied in the field of digital servo control of hydraulic motor angular displacement, to achieve the effect of improving system response capability, improving static and dynamic performance, and high dynamic tracking accuracy

Inactive Publication Date: 2014-03-19
JIANGSU UNIV OF SCI & TECH
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Problems solved by technology

The general feedback control method that is widely used today can no longer meet the requirements. The use of new electro-hydraulic servo systems and servo control methods is the problem to be solved to further improve the performance of electro-hydraulic servo systems

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  • Hydraulic-motor angular-displacement digital servo control system and method thereof
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  • Hydraulic-motor angular-displacement digital servo control system and method thereof

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0035] Such as figure 1 Shown is a block diagram of the hydraulic motor angular displacement digital servo control method according to the embodiment of the present invention. The control method is composed of digital control computer 110, digital / analog conversion module 120, servo amplifier 130, hydraulic source 140, servo object 150, photoelectric encoder 160 and high-speed counting module 170; digital control computer 110, digital / analog conversion module 120 , servo amplifier 130, servo object 150, photoelectric encoder 160 and high-speed counting module 170 are connected circularly in a clockwise direction; wherein the servo object 150 is serially connected in sequence by an electro-hydraulic servo valve 151, a hydraulic motor 152, and a mechanical load 153 , the electro-hydraulic servo valve 151 is also connected to the servo amplifier 130, the mechanical load...

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Abstract

The invention discloses a hydraulic-motor angular-displacement digital servo control system and a method thereof. The control system is formed by a digital control computer, a digital-to-analog conversion module, a servo amplifier, a servo object, a hydraulic source, a photoelectric encoder and a high speed counting module. The control method comprises the following steps of initializing an integrator and then reading a follow-up instruction signal and a feedback signal; carrying out first difference on the feedback signal and multiplying a first difference coefficient so as to obtain a first difference product; carrying out second difference operation on a first difference signal and multiplying a second difference coefficient so as to obtain a second difference product; taking an error on a sum of the follow-up instruction signal, the feedback signal, the first difference product and the second difference product; carrying out accumulation integration on an obtained error signal and multiplying an integration coefficient so as to obtain an integration product; carrying out digital-to-analog conversion on the integration product so as to obtain an analog quantity control signal and using the servo amplifier to control the servo object. By using the system and the method of the invention, cost is saved; installation is simplified; and a system response capability is increased.

Description

Technical field: [0001] The invention relates to a hydraulic motor angular displacement digital servo control system and method, in particular to a digital servo control method controlled by a digital computer with excellent performance and suitable for hydraulic motor angular displacement. Background technique: [0002] At present, the precise control of various mechanisms almost adopts the closed-loop feedback control method, and the precise control of the angular displacement of the hydraulic motor is no exception. In order to realize the closed-loop feedback control, the error signal between the input and output is often proportional (P), Integral (I), differential (D) and other operations, and where these operation methods are applied is a question worth exploring. At present, the widely used method is to perform PID operation on the error in the forward channel, which is simple and easy to implement, but every time an operation is added to the error in the forward chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00
Inventor 夏永锋朱鹏程张冰蔚
Owner JIANGSU UNIV OF SCI & TECH
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