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Compound control system and method for piezoelectric precision gas flow valve

A compound control and flow valve technology, applied in electric controllers, controllers with specific characteristics, etc., can solve the problems of poor control accuracy and slow response speed, and achieve improved nonlinearity, response speed, and particle search. effect of ability

Pending Publication Date: 2021-09-07
SHANGHAI NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The piezoelectric precision gas flow valve using the piezoelectric bimorph as the driver has a series of advantages such as low power consumption, large displacement and fast response speed. The complex factors of flow will lead to problems such as poor control accuracy and slow response speed of piezoelectric-driven gas flow valves.

Method used

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  • Compound control system and method for piezoelectric precision gas flow valve
  • Compound control system and method for piezoelectric precision gas flow valve
  • Compound control system and method for piezoelectric precision gas flow valve

Examples

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Embodiment

[0054] like figure 1 As shown, this embodiment provides a composite control system for a piezoelectric precision gas flow valve, which includes:

[0055] The feedforward compensation controller adopts the inverse model of the improved PI hysteresis model as the feedforward compensation controller. The input of the feedforward compensation controller is the target flow rate of the piezoelectric precision gas flow valve, and the output is the compensation control voltage;

[0056] Fuzzy adaptive PID feedback controller, the input of the fuzzy adaptive PID feedback controller is the error between the target flow rate and the actual flow rate of the piezoelectric precision gas flow valve and the error change rate, and the output feedback control voltage;

[0057] The accumulation drive controller is used for accumulating the compensation control voltage output by the feedforward compensation controller and the feedback control voltage output by the fuzzy adaptive PID feedback cont...

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Abstract

The invention relates to a compound control system and method for a piezoelectric precise gas flow valve, and the system comprises a feed-forward compensation controller, a fuzzy self-adaptive PID feedback controller and an accumulation driving controller; the feed-forward compensation controller employs an inverse model of an improved PI hysteresis model as the feed-forward compensation controller, the input of the feed-forward compensation controller is the target flow of the piezoelectric precise gas flow valve, and the output of the feed-forward compensation controller is compensation control voltage; the input of the fuzzy self-adaptive PID feedback controller is the error between the target flow and the actual flow of the piezoelectric precise gas flow valve and the error change rate, and the input of the fuzzy self-adaptive PID feedback controller is feedback control voltage; and the accumulation driving controller is used for accumulating the compensation control voltage output by the feed-forward compensation controller and the feedback control voltage output by the fuzzy self-adaptive PID feedback controller as the input voltage of the piezoelectric precise gas flow valve to control the operation of the piezoelectric precise gas flow valve. Compared with the prior art, the compound control system has the advantages of high control precision, high response speed and the like.

Description

technical field [0001] The invention relates to the technical field of precision gas flow valve control, in particular to a composite control system and method for a piezoelectric precision gas flow valve. Background technique [0002] With the development of pneumatic technology, gas precision control is more and more used in intelligent robots, industrial automation, medical machinery and other fields, and the requirements for gas flow control technology are also getting higher and higher. The piezoelectric precision gas flow valve using the piezoelectric bimorph as the driver has a series of advantages such as low power consumption, large displacement and fast response speed. The complex factors of the flow will lead to problems such as poor control accuracy and slow response speed of the piezoelectric-driven gas flow valve. [0003] With the wide application of gas flow control, for piezoelectric-driven precision gas flow valves, considering the hysteresis nonlinearity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 李传江邓徽王明月朱燕飞顾亚
Owner SHANGHAI NORMAL UNIVERSITY
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