A Fast Identification Method of Characteristic Parameters of a Kind of Industrial Controlled Process
A technology of controlled process and characteristic parameters, applied in the field of system modeling, it can solve the problems of long running time, inconvenient engineering application, and large amount of parameter calculation, and achieve the effect of simple algorithm, small amount of calculation, and low requirements for computing power.
Active Publication Date: 2020-11-17
HOHAI UNIV CHANGZHOU
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[0003] However, the commonly used system modeling method requires that the applied input signal must meet the condition of "continuous excitation"; in order to obtain enough data, the system must run for a long time; in addition, the calculation amount of parameters is relatively large, which brings great difficulties to engineering applications. many inconveniences
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[0019] In order to enable those skilled in the art to better understand the technical solutions in the application, the technical solutions in the embodiments of the application are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the application, and Not all examples. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work should fall within the protection scope of this application.
[0020] A fast identification method for characteristic parameters of an industrial controlled process. The method includes the following steps:
[0021] Step 1: Use the three characteristic parameters of open-loop gain K, time constant T and delay time L to describe the dynamic characteristics of the industrial controlled process, as shown in formula (1):
[0022]
[0023] In formula (1), K is the open loop gain, T is the time constant, L is the delay time,...
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The invention discloses a first-class industrial controlled process characteristic parameter rapid identification method. The method includes step 1, describing the dynamic characteristics of the industrial controlled process by means of the three characteristic parameters of the open loop gain K, the time constant T and the delay time L; step 2, applying a step signal with constant amplitude to the industrial controlled process, and acquiring a sampling information output value y (t) of the step response; step 3, calculating the corresponding accumulated values A1, A2, and A3 of the obtainedy(t), y2(t), and y3 (t); step 4, calculating the three characteristic parameters of the industrial controlled process according to the sampling information output value y(t) obtained in step 2, the obtained accumulated values A1, A2, and A3 through calculation in step 3, the running time t, and the sampling period Delta t. According to the invention, only the step signal needs to be applied to theindustrial controlled process, so that in the system modeling process, the industrial controlled process can run stably, and when the system operates stably, the needed data is collected, and the algorithm of the three characteristic parameters is simple, the calculation amount is small, and the requirement on the calculation capacity of the industrial controller is not high.
Description
Technical field [0001] The invention relates to a fast identification method for characteristic parameters of an industrial controlled process, and belongs to the field of system modeling. Background technique [0002] The design of industrial control systems relies on the mathematical model of the controlled process. The dynamic characteristics of most industrial processes can be approximated by a first-order time-delay model. [0003] However, the commonly used system modeling method requires that the applied input signal must meet the condition of "continuous excitation"; in order to obtain sufficient data, the system must run for a long time; in addition, the calculation of parameters is also relatively large, which brings engineering applications Many inconveniences. If the "continuous excitation" requirement for the input signal can be reduced, the calculation method of the parameters can be simplified, and the running time of the system can be shortened, it will bring grea...
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IPC IPC(8): G05B19/04
CPCG05B19/04
Inventor 杨启文张孜文余诗琦薛云灿
Owner HOHAI UNIV CHANGZHOU