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An imc-dahlin temperature regulator and method for a medical thermostat

A technology of temperature regulator and temperature control method, applied in the direction of temperature control, control/regulation systems, instruments, etc., can solve the problems of unstable objects, easy introduction of ringing phenomenon, inapplicability, etc., to overcome disturbance and fast track Effect of setting value

Active Publication Date: 2021-07-20
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the control performance of the SMITH estimator is severely affected by the model mismatch
Dahlin control algorithm is another effective method to solve large time-delay systems (Zafiriou E, Morari M.Digital controllers for SISO systems:areview and a new algorithm[J].International Journal of Control,1985,42(4):855 -876.Zhang W D,Sun Y X,Xu X M.Robust digital controller design for processes with dead times:New results[C] / / Control Theory and Applications,IEE Proceedings-.IET,1998,145(2):159-164. ), but the Dahlin control algorithm has two problems: (1) it is easy to introduce ringing phenomenon in the control loop; (2) it cannot be applied to unstable objects

Method used

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  • An imc-dahlin temperature regulator and method for a medical thermostat
  • An imc-dahlin temperature regulator and method for a medical thermostat
  • An imc-dahlin temperature regulator and method for a medical thermostat

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Embodiment 1

[0056] The application object is a medical incubator, and its lag time and time constant are relatively large. Through the relay feedback identification method, the object transfer function obtained through identification is:

[0057]

[0058] IMC-Dahlin control module. It is used to control the above-mentioned large time constant plus lagging system, optimize and calculate the appropriate heating power, and make the temperature of the medical incubator reach the set temperature value.

[0059] After using the present invention, the temperature control curve of the medical thermostat is as attached Figure 7 shown. After using this method, the temperature control effect is significantly smaller than that of the IMC method, and the stabilization time is shortened. The root mean square error of using IMC-Dahlin and using IMC is shown in the table below.

[0060]

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Abstract

An IMC-Dahlin double-closed-loop temperature regulator for a medical thermostat, comprising a temperature sensor connected to a medical thermostat object, a temperature control relay, a data conversion module and an IMC-Dahlin double-closed-loop temperature regulator. The IMC-Dahlin double-closed-loop temperature regulator includes: a data conversion module, a relay feedback model identification module, an IMC-Dahlin double-closed-loop controller module, and provides a method for identifying a medical thermostat based on a relay feedback model. IMC‑Dahlin double closed loop temperature regulation method.

Description

technical field [0001] The invention relates to the field of embedded controller development, and relates to a temperature regulator and a method for temperature control of a medical thermostat. Background technique [0002] The medical incubator is mainly used for the insulation storage and heating of medicines and reagents, and is a widely used medical equipment. Because there is a certain hysteresis in the temperature detection of the medical incubator, and the temperature adjustment time constant of the incubator is relatively large and has time-varying characteristics, the temperature control of the incubator is a relatively complicated control problem. [0003] Modern control theory is a model-based control strategy. Aiming at the difficulty in modeling complex object mechanisms, the method of system identification is usually used to obtain the control object model. Because the temperature control object of the medical incubator has the characteristics of large lag an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D23/20
CPCG05D23/20
Inventor 赵众李普贤郭世杰童镇立郭伟童俊强贾建国殷佳豪
Owner BEIJING UNIV OF CHEM TECH