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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: 2008-07-16
北京英华达电力电子工程科技有限公司
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  • Summary
  • 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

[0028] 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.

[0029] A process flow of a method for temperature regulation in an embodiment of the present invention is shown in FIG. 1 . In this embodiment, it is assumed that the set value is r and the measured value is y. With reference to Fig. 1, present embodiment comprises the following steps:

[0030] Step s101, setting the initial values ​​of the proportional factor, the integral factor and the differential factor.

[0031] 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 / change valu...

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Abstract

The invention discloses a temperature adjusting method which comprises the following steps that: current temperature value is measured and deviation e is obtained according to the current temperature value; when the absolute value of e is more than a second deviation threshold and is less than or equal to a first deviation threshold, P, I and D is adjusted and the proportional action and integral action in control is increased while derivative action is weakened; when the absolute value e is more than or equal to zero and is less than or equal to the second deviation threshold, P, I and D is adjusted and the proportional action, integral action and derivative action in control is weakened; according to a third deviation threshold A and the deviation e, integral action intensity factor is adjusted; according to the adjusted P, I, D and integral action intensity factor, the increment of control quantity is obtained; moreover, temperature is adjusted according to the increment of control quantity. The invention also discloses a temperature adjusting device. In addition, the invention can effectively reduce the overshoot and oscillation phenomena during 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 contr...

Claims

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Application Information

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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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