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A Boiler Temperature Adjustment Method and System Based on Numerical Differentiation

An adjustment method and numerical differentiation technology, applied in control/regulation systems, temperature control, instruments, etc., can solve problems such as large amount of calculation, complex implementation process of differentiator, poor control effect, etc., and achieve high accuracy and high suppression Good frequency noise effect and simple structure

Active Publication Date: 2022-07-12
CHANGAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a boiler temperature adjustment method and system based on numerical differentiation, so as to solve the problem that the implementation process of the differentiator for boiler temperature control in the prior art is complicated and the amount of calculation is large in actual use. , the problem of poor control effect

Method used

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  • A Boiler Temperature Adjustment Method and System Based on Numerical Differentiation
  • A Boiler Temperature Adjustment Method and System Based on Numerical Differentiation
  • A Boiler Temperature Adjustment Method and System Based on Numerical Differentiation

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Embodiment

[0086] At present, the boiler temperature control system generally adopts PID control. The present invention replaces the traditional PID control differential link with a discrete differentiator, and obtains a new type of PID controller with different structure, which is applied to the boiler temperature control system. The structure of the boiler temperature control system like Figure 5 As shown, the controlled object in this system is a heat exchanger, which has obvious inertia, and this example uses two inertia links in series to achieve this characteristic.

[0087] The boiler temperature control system model such as Image 6 . The system is a closed-loop system, and the controlled quantity is temperature. The system consists of comparator, PID controller, three-position relay, actuator, heat exchanger and temperature sensor. When the user has a demand for hot water, the actuator (valve) of the boiler temperature control system is opened, and the system enters the wate...

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Abstract

The invention discloses a method and a system for adjusting boiler temperature based on numerical differentiation. The differentiator realized by the numerical differentiation algorithm based on Newton interpolation polynomial adopted in the present invention has a small amount of calculation, and the differentiator realized by this method has a small difference in the differential link. The utility model has the advantages of high accuracy, good frequency characteristics, good effect of suppressing high-frequency noise, simple structure and easy implementation. Since the ideal differentiator does not exist in real life, it is not easy to realize physically, and the temperature sampling points in the boiler system are often distributed equidistantly. , which is intended to achieve a better differential effect by selecting appropriate interpolation points and sampling steps.

Description

technical field [0001] The invention belongs to the field of boiler temperature control, and relates to a boiler temperature adjustment method and system based on numerical differentiation. Background technique [0002] In the boiler temperature control system, the temperature as the controlled object is an inertial system with delay characteristics. Differentiators are needed in the traditional PID control method of boiler temperature control. From the middle of the last century to the present, many scholars at home and abroad have been researching this topic and have obtained rich scientific research results. The differentiation at the nodes is approximated by the discrete data of the function, usually called numerical differentiation. There are two main reasons why many scholars pay so much attention to numerical differential problems. One is that numerical differential problems are typical ill-posed problems in the sense of Hadamard, that is to say, in the measurement p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D23/20
CPCG05D23/20
Inventor 王飚霍梁郑乐林少军柯吉武飞赵微微杨雨仪马雨庆董伊媚唐必成赵醒秦裕德吴浩杨航崔冰晶吕亚泽陈东瑞
Owner CHANGAN UNIV
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