A water hydraulic motor speed control system and method

A speed control, water hydraulic technology, applied in servo motors, fluid pressure actuating devices, mechanical equipment, etc., can solve the problems of inability to adapt to water hydraulic systems, low control accuracy, slow response speed, etc., and achieve strong anti-disturbance ability. , the effect of good robustness and fast response
CN109695598BActive Publication Date: 2020-02-18HANGZHOU DIANZI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HANGZHOU DIANZI UNIV
Publication Date
2020-02-18

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Abstract

The invention discloses a water hydraulic motor speed control system and method. The present invention utilizes fuzzy control to overcome the defects of low control precision of the traditional control method and cannot adapt to the multi-variable and non-linear defects of the water hydraulic system; utilizes target rotational speed feedforward and system total volume efficiency feedback to compensate the rotational speed fluctuation of the water hydraulic motor in advance; The difference between the theoretical speed and the actual speed of the servo motor is fed back, forming a local small closed loop in the control of the speed of the servo motor, improving the accuracy of the speed control of the servo motor; based on the multi-resolution analysis theory, the interference components in the flow signal are analyzed The signal is stripped, and then the signal is reconstructed; the wavelet transform is performed on the rotational speed signal to reduce or eliminate the quantization error in the rotational speed information. The invention has high control precision for the rotational speed of the water hydraulic motor, fast response speed, strong anti-disturbance ability, and smooth output of the rotational speed of the water hydraulic motor.
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Description

technical field

[0001] The invention belongs to the technical field of water hydraulic motor control, and in particular relates to a water hydraulic motor speed control system and method. Background technique

[0002] With the implementation of the national marine strategy, the water hydraulic system is more and more widely used in the deep sea and the ocean, and the requirements for the control accuracy of the water hydraulic motor speed are getting higher and higher. However, due to the special properties of water such as low viscosity, poor lubrication performance and high gasification pressure, water hydraulic motors are more prone to occurrence, cavitation impact, water hammer noise, etc., making the speed of water hydraulic motors more likely to fluctuate than hydraulic motors. Controls are also harder. There are three modes of water hydraulic motor speed regulation: throttling speed regulation, variable displacement and variable speed. The throttling speed regulatio...

Claims

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