Controlled object frequency domain phase characteristic identification method and apparatus thereof

A technology for controlling objects and phase characteristics, applied in electric controllers, controllers with specific characteristics, etc., can solve the problem that the model identification technology is difficult to widely apply, the process technology has a great impact on normal production, and the time domain identification implementation algorithm is complex, etc. question

Active Publication Date: 2012-04-11
GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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Problems solved by technology

[0003] The existing object model identification technology is mainly based on the identification of the characteristics of the process object model in the time domain, and there are three main problems: First, the realization algorithm of the time domain identification is complicated, so it is difficult to implement it in the existing DC

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  • Controlled object frequency domain phase characteristic identification method and apparatus thereof
  • Controlled object frequency domain phase characteristic identification method and apparatus thereof
  • Controlled object frequency domain phase characteristic identification method and apparatus thereof

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[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0030] figure 1 It is a flow chart of the identification method of frequency-domain phase characteristics of the control object of the present invention, including:

[0031] S101: adding a spectrum identification signal to an input signal of a regulation loop composed of a regulator and a control object;

[0032] S102: Filter the output signal of the regulator to obtain a reference frequency signal, where the reference frequency signal includes the same spectrum component as the spectrum identification signal;

[0033] S103: Filter the output signal of the control object connected to the output terminal of the regulator to obtain a process frequency signal, where the process frequency signal contains the same spectrum component as the spectrum identification sign...

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Abstract

The invention discloses a controlled object frequency domain phase characteristic identification method and an apparatus thereof. The method comprises the following steps: adding a frequency spectrum identification signal into an input signal of a regulation loop which is formed by an regulator and the controlled object; filtering an output signal of the regulator and acquiring a reference frequency signal; filtering the output signal of the controlled object which is connected with an output terminal of the regulator and acquiring a process frequency signal; comparing a phase of the reference frequency signal with the phase of the process frequency signal and acquiring a controlled object frequency domain transmission phase value. Through using the method and the apparatus of the invention, frequency spectrum resources can be saved and the frequency domain phase characteristic of the controlled object can be identified. All the continuous frequency spectrum resources of a thermal object are not needed. A limited quantity of non-continuous single frequency point spectrums are only needed. Through using a filter to filter the single frequency point frequency spectrum signal, most of the interference signals can be eliminated.

Description

technical field [0001] The invention relates to the technical field of thermal control, in particular to a method and device for identifying frequency-domain phase characteristics of a control object. Background technique [0002] Thermal control objects in thermal power plants have the characteristics of large inertia, pure delay, and time-varying characteristics, especially the characteristics of the control objects are difficult to understand in depth and accurately, making the system difficult to control. How to effectively overcome various adverse effects, thereby improving the regulation quality of thermal control loops, has always been one of the goals constantly pursued in the field of thermal control. In order to improve the control quality of thermal objects, it is very important to identify the control object model. [0003] The existing object model identification technology is mainly based on the identification of the characteristics of the process object model...

Claims

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Application Information

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IPC IPC(8): G05B11/42
Inventor 李军舒探宇吴挺深万文军
Owner GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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