Unlock instant, AI-driven research and patent intelligence for your innovation.

High-order system model reduction and PID control method based on frequency domain

A technology of system model and control method, which is applied to controllers with specific characteristics, adaptive control, electric controllers, etc., can solve problems such as unsatisfactory closed-loop control effects and rough methods, and achieve the effect of improving closed-loop control effects

Active Publication Date: 2018-11-30
SOUTHEAST UNIV
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The above-mentioned "engineering setting method" obtains the parameters of the PID controller through empirical formulas and tables. Although the application is simple, the method is too rough, and the final closed-loop control effect is not ideal.

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
  • High-order system model reduction and PID control method based on frequency domain
  • High-order system model reduction and PID control method based on frequency domain
  • High-order system model reduction and PID control method based on frequency domain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] The technical solution of the present invention will be further introduced below in combination with specific implementation methods and accompanying drawings.

[0036] This specific embodiment discloses a high-order system model reduction and PID control method based on the frequency domain, such as Image 6 As shown, firstly through the reduced order model The original high-order process is reduced to a second-order pure delay process, where K is the static gain, T 1 is a time constant of the inertia part in the reduced-order model, T 2 is another time constant of the inertia part in the reduced-order model, and τ is the pure delay time constant; then, based on the second-order pure delay process, the PID controller is designed using formulas (1) and (2):

[0037]

[0038]

[0039] where K C is the proportional coefficient in the PID control parameters, T d is the differential coefficient in the PID control parameters, T i is the integral coefficient in th...

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 high-order system model reduction and PID control method based on a frequency domain. First, an original high-order process is reduced to a second-order pure delay process through a reduction model, and then a PID controller is designed based on the second-order pure delay process. The high-order system model reduction and PID control method based on the frequency domaineffectively improves the closed loop control effect.

Description

technical field [0001] The invention relates to a method for reducing the order of a high-order process, in particular to a method for reducing the order of a high-order system model based on a frequency domain and a PID control method. Background technique [0002] At present, the control effects of PID tuning methods for high-order processes commonly used in thermal engineering processes are not ideal, but the control effects of PID tuning methods for low-order processes currently used are relatively ideal. Therefore, if the high-order process can be If the process is properly reduced to a low-order process, and then the PID tuning method for the low-order process is adopted, the control effect should be improved. The traditional high-order process PID tuning method is the look-up table method and the critical proportional band method in the engineering tuning method. The method steps are as follows: [0003] 1. Look-up table method: [0004] 1). According to The order...

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): G05B11/42G05B13/04
CPCG05B11/42G05B13/042
Inventor 强筱婕孙立
Owner SOUTHEAST UNIV