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Learning feedforward controller and vapor compression refrigeration control system and method

A feed-forward controller and control system technology, applied in general control systems, control/regulation systems, adaptive control, etc., can solve the problems of destabilizing the system, reducing performance, and poor control performance, so as to improve real-time performance, Improve performance and robust stability, achieve temperature effects

Pending Publication Date: 2019-09-20
QILU UNIV OF TECH
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Problems solved by technology

Small changes in system operating process conditions can degrade performance and may even destabilize the system, and feedback controllers with greater robustness tend to perform poorly
[0005] The inventors found that when a model-based feedback controller is used to control a complex single-stage refrigeration process, the inaccuracy of the model will lead to poor control performance, and these problems can be solved by using feedforward control. However, for refrigeration systems, The traditional feedforward control method uses system error information for compensation and regulation, which will affect the timeliness of control

Method used

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  • Learning feedforward controller and vapor compression refrigeration control system and method
  • Learning feedforward controller and vapor compression refrigeration control system and method
  • Learning feedforward controller and vapor compression refrigeration control system and method

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Embodiment Construction

[0041] The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.

[0042] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0043] It should be noted that the terminology used herein is only for describing specific embodiments, and is not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

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Abstract

The invention provides a learning feedforward controller and a vapor compression refrigeration control system. The learning feedforward control strategy comprises: t shows time, j shows the number of iteration loops, and j is a positive integer greater than or equal to 1; u<j>ff shows the learning feedforward term with jth iteration; u<j-1>ff shows the learning feedforward term with (j-1)th iteration; [gamma] is a learning gain, wherein 0<[gamma]<1; and u<j-1>fb shows an error feedback value in the learning feedforward term corresponding to the error between the output of the controlled system with the (j-1)th iteration and an expected output. The learning feedforward controller and the vapor compression refrigeration control system and method can comprehensively improve the performance and the robust stability of the feedforward controller, and the feedforward controller can also be applied to the vapor compression refrigeration control system to improve the real-time performance of the temperature control of the refrigeration system.

Description

technical field [0001] The disclosure belongs to the field of vapor compression refrigeration control, and in particular relates to a learning feedforward controller, a vapor compression refrigeration control system and a control method. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Refrigeration system is a cooling process to achieve and maintain a product or space lower than the temperature of the surrounding environment. It is used in many aspects such as food preservation, chemical and craft industry, manufacturing process, metal cold treatment, pharmaceutical manufacturing, ice making and so on. With the rapid development of modern technology, vapor compression refrigeration system has become the most commonly used means of commercial and residential space cooling, resulting in a rapid increase in energy consumption, negative impa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 赵阳孙鸿昌周风余李岩陈阳泉
Owner QILU UNIV OF TECH
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