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Humanoid intelligent control method for vibration amplitude of Coriolis mass flowmeter

A Coriolis flowmeter and vibration amplitude technology, applied in computer control, direct mass flowmeter, program control, etc., can solve the problems of difficult selection of integral separation judgment value, prolonged vibration start time, etc.

Inactive Publication Date: 2014-12-24
LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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Problems solved by technology

The two PI controllers embody certain intelligent characteristics and effectively improve the control performance, but it is difficult to select the judgment value of the integral separation, and the result is affected by the change of the damping ratio; the integral limiting PI controller can better solve the problem of integral saturation, The problem of overshoot occurs, but the start-up time is prolonged

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  • Humanoid intelligent control method for vibration amplitude of Coriolis mass flowmeter
  • Humanoid intelligent control method for vibration amplitude of Coriolis mass flowmeter
  • Humanoid intelligent control method for vibration amplitude of Coriolis mass flowmeter

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with accompanying drawing:

[0039] If the predetermined amplitude of the vibration of the measuring tube of the Coriolis flowmeter is A 0 , the actual vibration amplitude is A(t), define the amplitude deviation e=A(t)-A 0 , rate of change of amplitude deviation Set the amplitude deviation threshold e 1 、e 2 、e 3 , where e 1 >e 2 >e 3 >0, amplitude deviation e2 | is the acceptable deviation range, use e m，n , n=1, 2... represents the extreme value of the amplitude deviation.

[0040] like figure 1 Shown is the vibration signal curve of the Coriolis flowmeter, figure 2 Shown is the vibration signal amplitude deviation from the phase plane. According to the amplitude deviation extremum e m，n The size of the Coriolis flowmeter measuring tube vibration is divided into the vibration stabilization stage and the interference suppression stage, if |e m，n |>e 2 , then it is start-up and steady-a...

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Abstract

The invention relates to the field of flow detection and discloses a humanoid intelligent control method for vibration amplitude of a Coriolis mass flowmeter. The humanoid intelligent control method for the vibration amplitude of the Coriolis mass flowmeter comprises the following steps: dividing the vibration of a measuring tube of the Coriolis mass flowmeter into a vibration starting and amplitude stabilizing stage and an interference suppression stage, and dividing vibration starting and amplitude stabilizing vibration into 5 characteristic states and interference suppression vibration into 3 characteristic states according to errors of the vibration amplitude and given amplitude and an error variation trend; constructing 8 corresponding control modes by imitating the control experience of human by aiming at 8 different characteristic states; selecting the corresponding control mode by applying intuitional reasoning according to the current characteristic state of the vibration of the current measuring tube, and outputting amplitude gain. The humanoid intelligent control method disclosed by the invention has the beneficial effects that the vibration-starting speed and the response speed of the Coriolis mass flowmeter are effectively increased, and the vibration stability is enhanced.

Description

technical field [0001] The invention relates to the field of flow detection, and is a human-like intelligent control method for the vibration amplitude in a Coriolis mass flowmeter (referred to as a Coriolis flowmeter), which imitates the human intelligent design controller to control the vibration amplitude of the Coriolis flowmeter. For fast and stable control. Background technique [0002] Flow rate is an important detection parameter in industrial process control. As a direct mass flowmeter, Coriolis flowmeter has a series of superior performances such as non-contact detection, high detection accuracy, wide application range of fluid and multi-parameter detection. It is widely used in Petroleum, chemical industry, food, medicine and other fields. [0003] The Coriolis flowmeter detects the mass flow by calculating the time difference of the vibration signals of the two measuring tubes. The rapid start-up and stable amplitude vibration performance of the measuring tube s...

Claims

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Application Information

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IPC IPC(8): G01F1/84G05B19/042
Inventor 涂亚庆杨辉跃
Owner LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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