Fractional order integration PID controller setting and self-setting method

A fractional-order integrator and fractional-order technology, applied in the field of fractional-order integral PID controller tuning and self-tuning, can solve the problems of complex implementation and complex determination process, and achieve the effect of self-tuning

Active Publication Date: 2014-02-05
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Problems solved by technology

[0046] Aiming at the complex technical problem of determining the parameters of the fractional-order PID controller in the prior art an

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  • Fractional order integration PID controller setting and self-setting method
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  • Fractional order integration PID controller setting and self-setting method

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[0077] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0078] Such as figure 1 The closed-loop control structure diagram of the fractional-order integral PID controller of the present invention is shown. Among them, the output of the fractional integral PID controller is the control signal u, which is used to control the controlled object, r is the input of the closed-loop system, y is the output of the closed-loop system, e is the deviation signal, and d is the interference signal. Emphasis of the present invention is to design a kind of fractional order integral PID controller, is used for controlling the controlled object, for conveni...

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Abstract

The invention relates to the technical field of PID control, and discloses a fractional order integration PID controller setting and self-setting method. The method specifically comprises the following steps that firstly, the Bode ideal transfer function order beta and the amplitude cross-over frequency omega c are appropriately selected to meet the formula: 1<beta<2 and the formula: 0<omega c<omega max; secondly, when a controlled object mathematical model P(s) is known, the low order derivative of a transfer function model of a controlled object is solved, and then the third step is carried out, and when the controlled object mathematical model P(s) is unknown, the system information is identified according to the step response of the controlled object or the relay closed loop response, and the third step is carried out, wherein the two conditions are not met, the process is ended; thirdly, PID controller parameters with the fractional order integration are fast determined according to the parameter setting formula. According to the technical scheme, automatic control of an ordinary industrial process can be achieved easily.

Description

technical field [0001] The present invention relates to the technical field of PID (PID: Proportional-integral-derivative, abbreviation for proportional integral-derivative) controller, in particular to a fractional-order integral PID controller—FOIPID (FOIPID: Fractional-order integrating Proportional-integral-derivative, fractional The realization method of the proportional-integral-derivative) controller of order integral. Background technique [0002] The purpose of industrial controller design is to make the controlled object run according to the required indicators, or to make the controlled object have the desired response. PID control has become the most common control method because of its simple control structure and easy implementation. At present, the traditional empirical formula is the main method for PID controller parameter tuning, and there is also an integral performance optimization method based on the deviation between the set value and the measured valu...

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Application Information

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IPC IPC(8): G05B11/42
Inventor 陈永会谭功全
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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