Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Multi-mode flow adjusting system and method based on displacement flow double closed loops

A flow regulation and multi-mode technology, applied in the direction of control/regulation system, flow control, flow control of electrical devices, etc., can solve the problems of low reliability and slow adjustment speed of single feedback loop, and achieve reliability and fault tolerance capability, and the effect of improving reliability

Active Publication Date: 2022-03-25
BEIJING INST OF CONTROL ENG
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in order to achieve precise control of the flow rate of the air-conditioning variable thrust system, the traditional method usually adopts a single-loop control method based on the flow sensor. Due to the hysteresis and creep characteristics of the piezoelectric valve itself, the traditional method has a slow adjustment speed and the reliability of the single feedback loop. not high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multi-mode flow adjusting system and method based on displacement flow double closed loops
  • Multi-mode flow adjusting system and method based on displacement flow double closed loops

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] Such as figure 1As shown, the present invention is a multi-mode flow regulation system based on displacement flow double closed loop, mode selector K1, negative feedback subtractor F1, controller A1, model M1, flow sensor S1, mode selector K2, model M2, mode Selector K3, Negative Feedback Subtractor F2, Model M3, Controller A2, Displacement Sensor S2, Mode Selector K4, Model M4, Piezoelectric Proportional Valve P; Explain Model X

[0038] For controller A1 or A2: the expression of its input-output relationship is as follows:

[0039] u(k)=K p [e(k)-e(k-1)]+K i e(k)+K d (1-a)[e(k)-2e(k-1)+e(k-2)]+(1+a)u(k-1)-au(k-2)

[0040] Among them, the controller input is the output of the negative feedback subtractor F1 or F2, namely the error.

[0041] e(k) is the current error, e(k-1) is the previous historical error, and e(k-2) is the last historical error. u(k) is the current output value of the controller, u(k-1) is the last output value of the controller, u(k-2) is the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a multi-mode flow adjusting system and method based on displacement flow double closed loops. The multi-mode flow adjusting system comprises a displacement inner loop control loop based on a displacement sensor and a flow outer loop control loop based on a flow sensor. The inner control loop and the outer control loop can be controlled to work in an open-loop state and a closed-loop state through a mode selector, and four working modes are formed. The displacement feedback loop is introduced on the basis of the flow feedback loop, the opening displacement of the piezoelectric valve is controlled, and then the convergence speed of the piezoelectric proportional valve in actual flow adjustment is increased; meanwhile, by means of multiple working modes, the reliability and fault-tolerant capability of the proportional piezoelectric flow adjusting system are achieved, and the working reliability problem of the flow adjusting system when a single sensor breaks down is solved.

Description

technical field [0001] The invention relates to the field of flow control, in particular to a multi-mode flow regulation system and method based on double closed-loop displacement flow. Background technique [0002] Ultra-high-precision low-noise satellites require propulsion systems with high thrust stability, low thrust noise, and high control precision in order to counteract μN or even sub-μN level space interference forces such as solar light pressure and achieve drag-free control. Air-conditioning variable thrust technology has become one of the most popular technologies for ultra-high-precision and low-noise satellite propulsion systems, and its core is high-precision, fast-response flow control. The traditional air-conditioning variable thrust system mainly includes two parts: proportional thruster and flow sensor. The air-conditioning variable thrust system adjusts the throat area with proportional valve according to the feedback of the flow sensor, controls the gas ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G05D7/06
CPCG05D7/0635
Inventor 龙军刘旭辉李永汪旭东姚兆普付新菊高永耿金越张恒吕泰增石召新刘清源关威魏延明
Owner BEIJING INST OF CONTROL ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com