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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

Active Publication Date: 2020-02-18
HANGZHOU DIANZI UNIV
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AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies in the prior art, the present invention proposes a water hydraulic motor speed control system and method, using fuzzy control to overcome the traditional control method's low control accuracy and unable to adapt to the multi-variable and nonlinear defects of the water hydraulic system; but for water hydraulic When the motor speed fluctuates greatly, the response speed of the fuzzy control is slow. The reason is that when the water hydraulic motor speed fluctuates greatly, it is often accompanied by the change of the volumetric efficiency of the water hydraulic pump and the water hydraulic motor, so that the actual speed of the water hydraulic motor is adjusted to the target speed. the process becomes longer

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  • A water hydraulic motor speed control system and method
  • A water hydraulic motor speed control system and method
  • A water hydraulic motor speed control system and method

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with accompanying drawing.

[0029] Such as figure 1 As shown, a water hydraulic motor speed control system is composed of a power source A, a water hydraulic system B, a detection system C, a control system D and a data transmission system E. The power source is composed of a servo controller 3 and a servo motor 5; the servo controller controls the servo motor.

[0030] Such as figure 1 with 2 As shown, the water hydraulic system includes a water hydraulic pump 8 , a water hydraulic motor 18 and a pilot electromagnetic overflow valve 21 ; the water hydraulic pump 8 is driven by a servo motor 5 . The input end of the water hydraulic pump 8 is connected to the water tank 1 through the filter 9, and the output end is connected to the water tank 1 through the one-way valve 7 and the pilot electromagnetic overflow valve 21 in turn; the pilot electromagnetic overflow valve 21 is used to limit the working...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B11/04
CPCF15B11/04
Inventor 王志强傅祺毋少峰倪敬
Owner HANGZHOU DIANZI UNIV
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