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Temperature regulation method and device

A temperature regulation, current temperature technology, applied in the direction of using electric means for temperature control, controllers with specific characteristics, electric controllers, etc., can solve problems such as temperature control overshoot and oscillation

Inactive Publication Date: 2009-12-02
北京英华达电力电子工程科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] The problem to be solved by the embodiments of the present invention is to provide an adjustment method and device for temperature adjustment to overcome the defects of overshoot and oscillation that are prone to occur in the existing PID control temperature control process

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  • Temperature regulation method and device

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Embodiment Construction

[0025] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] The process flow of a method for temperature regulation in the embodiment of the present invention is as follows: figure 1 As shown, in this embodiment, it is assumed that the set value is r and the measured value is y. refer to figure 1 , this embodiment includes the following steps:

[0027] Step s101, setting the initial values ​​of the proportional factor, the integral factor and the differential factor.

[0028] The proportional factor P is inversely proportional to the magnitude of the corresponding change in the measured value when the output changes by 100%. The initial value of the proportional factor P can be set according to the formula P=0.4*range / cha...

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Abstract

The invention discloses a method for temperature regulation, which includes: measuring the current temperature value and obtaining the deviation e according to the current temperature value; when the second deviation threshold<|e|≤the first deviation threshold, adjusting P, I and D, increasing The proportional action and integral action in the control weaken the differential action; when 0≤|e|≤the second deviation threshold, adjust P, I and D to weaken the proportional action, integral action and differential action in the control; according to the third deviation Threshold A and deviation e, adjust the integral action intensity factor; according to the adjusted P, I, D and integral action intensity factor, obtain the increment of the control amount, and adjust the temperature according to the increment of the control amount. The invention also discloses a temperature regulating device. The invention can effectively reduce the phenomenon of overshoot and oscillation in the process of temperature control.

Description

technical field [0001] The invention relates to the technical field of industrial control, in particular to a method and device for temperature regulation. Background technique [0002] Industrial process PID control is a widely used and simple and reliable control method. The classic PID control algorithm is as follows: [0003] Δu(n)=Kp*[e(n)-e(n-1)]+Ki*e(n)+Kd*[e(n)-2*e(n-1)+e(n-2 )] (1) [0004] Or Δu(n)=Pval+Ival+Dval (2) [0005] Among them, Kp is the proportional coefficient, and the customary proportional band is 100 / Kp; [0006] Ki is the integral coefficient, Ki=Kp*T / Ti (3) [0007] Kd is the differential coefficient, Kd=Kp*Td / T (4) [0008] Pval is a proportional effect, Pval=Kp*[e(n)-e(n-1)] (5) [0009] Ival is integral action, Ival=Ki*e(n) (6) [0010] Dval is the differential action, Dval=Kd*[e(n)-2*e(n-1)+e(n-2)] (7) [0011] In the formula, Δu(n) is the increment of the control quantity at time n, and e(n), e(n-1) and e(n-2) are respectively the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D23/19G05B11/42
Inventor 严可国阮跃
Owner 北京英华达电力电子工程科技有限公司
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