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Optimal Fractional PID Control Method for Permanent Magnet Synchronous Motor with Strong Tracking

A technology of permanent magnet synchronous motor and control method, which is applied in motor control, AC motor control, electronic commutation motor control and other directions, can solve problems such as lack of search methods, and achieve the effect of fast convergence speed

Active Publication Date: 2020-05-22
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the study of previous literature and patents, we found that the fractional-order PID control method for single-input and single-output time-delay systems proposed by Ou Linlin (Ou Linlin; Zhou Peidong; Chen Xuanguang; Feng Yuanjing; Yu Li. Fractional order of single-input and single-output time-delay systems The first-order PID controller method [P]. Chinese patent: CN102073270A, 2011-05-25) provides a relatively simple method for solving the stable domain of the system, but lacks the method for finding the optimal point in the stable domain

Method used

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  • Optimal Fractional PID Control Method for Permanent Magnet Synchronous Motor with Strong Tracking
  • Optimal Fractional PID Control Method for Permanent Magnet Synchronous Motor with Strong Tracking
  • Optimal Fractional PID Control Method for Permanent Magnet Synchronous Motor with Strong Tracking

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Embodiment Construction

[0082] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0083] The optimal fractional-order PID control method of the permanent magnet synchronous motor with strong tracking of the present invention, the specific process is as follows:

[0084] Step 1: Assume a fractional order model of a permanent magnet synchronous motor as follows:

[0085]

[0086] Step 2: In this experiment, the fractional order PD controller is used to output alternating current to control the speed of the permanent magnet synchronous motor. For a fractional-order PD controller, it is obvious that the controller parameter k i =0, λ=0. The transfer function of the fractional order PD controller is as follows:

[0087] c(s)=k p +k d the s μ

[0088] Step 3: The closed-loop characteristic equation of the control system is as follows:

[0089] P(s; k p ,k i ,k d )=(s 2.9544 +127.38s 2.0463 +9995.678s 1.0463 )e 0...

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Abstract

A permanent magnet synchronous motor optimal fractional order PID (proportional-integral-derivative) control method having great tracking performance is provided. The method takes advantage of the characteristics that PSO (particle swarm optimization) algorithm is capable of finding optimal solutions by iteration and has high converging speed; fractional order PID controller parameters within a stable domain range are subjected to iterative optimization; firstly, particles in the PSO algorithm are initialized, positional coordinates of the particles are randomly distributed in a stable domain;secondly, the particles are subjected to fitness calculation, and their initial speed is set so that the particles can move towards better fitness; thirdly, repeated iteration is performed until a difference of double iterations is less than a set error, and an optimal solution is obtained, that is to say, a fractional order PID controller parameter optimal solution in the stable domain range isobtained. By using the PSO algorithm, multiple fractional order PID controller parameters can be adjusted faster and more accurately.

Description

technical field [0001] The present invention relates to the adjustment of multiple parameters of a fractional-order PID controller, and it is difficult to quickly and accurately determine the parameters of the fractional-order PID controller. The fractional-order PID multi-parameter tuning method designed by the present invention uses the PSO algorithm to find the optimal point of the parameters, combined with the system stability domain The determination method can quickly and accurately determine the parameters of the fractional PID controller, so that the controller can output the optimal current frequency and control the speed of the permanent magnet synchronous motor. Background technique [0002] With the continuous development of control methods, great breakthroughs have been made in the design technology of controllers, such as time-delay controllers, feedback controllers, PID controllers and so on. PID controller has the advantages of simple structure, low price, go...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/00H02P6/34H02P23/00H02P25/022
CPCH02P6/00H02P6/34H02P23/0004H02P25/024H02P2207/05
Inventor 禹鑫燚张铭扬欧林林杨帆朱熠琛
Owner ZHEJIANG UNIV OF TECH