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Permanent-magnet DC motor speed online control method based on membrane algorithm

A technology of DC motor and control method, which is applied in the direction of electric speed/acceleration control, adaptive control, general control system, etc., can solve the problems of difficult to obtain system model and unstable driving system.

Active Publication Date: 2017-05-10
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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AI Technical Summary

Problems solved by technology

However, these control systems have high requirements on the accuracy of mathematical models, and accurate system models are usually difficult to obtain
At the same time, due to the uncertainty of the motor load and its nonlinear mechanical characteristics, it is likely to cause the drive system to be unstable

Method used

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  • Permanent-magnet DC motor speed online control method based on membrane algorithm
  • Permanent-magnet DC motor speed online control method based on membrane algorithm
  • Permanent-magnet DC motor speed online control method based on membrane algorithm

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Embodiment Construction

[0021] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples are only used to explain the present invention, and are not intended to limit the present invention.

[0022] like figure 1 , 2 and image 3 As shown, a permanent magnet DC motor speed control method based on membrane algorithm, including the following steps:

[0023] Step 1: According to the balance between the control voltage of the permanent magnet DC motor drive system and the voltage of each component, and the balance between the motor load torque and the development torque and friction torque, the required voltage and current and the change of torque with time and load are derived. Mathematical model (as shown in (1)).

[0024] where v a (t), e b (t) and i a (t) are time-varying motor terminal voltage, back electromotive force and armature current respectively; ω r (t) is the motor speed, R a and L a Respectively, th...

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Abstract

The invention discloses a permanent-magnet DC motor speed online control method based on a membrane algorithm, comprising the following steps: S1, deriving input and output variables of a model needing to be built; S2, constructing a Gaussian process model and a second-order polynomial model; S3, constructing a three-layer membrane algorithm framework; and S4, completing speed control. As a biological heuristic algorithm with high parallelism, the membrane algorithm has good global and local optimization ability. Through the parallelism of the membrane algorithm, a prediction can be made quickly. Through communication between different membranes, the prediction effect of different models is enhanced. High-precision speed control can be achieved eventually. Moreover, the method has low requirement on the sensitivity of parameters, and involves very few parameters.

Description

technical field [0001] The invention relates to the technical field of speed control of permanent magnet direct current motors, in particular to an online speed control method of permanent magnet direct current motors based on membrane algorithm. Background technique [0002] At present, high-performance permanent magnet DC motors are widely used in industries such as robots, rolling mills, and machine tools. For the use of these high-performance permanent magnet DC motors, the core problem is to control the precise speed (displacement) of the motor. Since the high-performance permanent magnet DC motor requires the motor to respond quickly, the speed can quickly recover from the load impact, and is insensitive to parameter variables, so the precise control of the motor speed is a current research hotspot. [0003] Traditional permanent magnet DC motor speed control adopts proportional-integral (PI) or proportional-integral-derivative (PID) control. These control algorithms ...

Claims

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Application Information

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IPC IPC(8): G05B13/04G05D13/62
CPCG05B13/048G05D13/62
Inventor 潘林强姜素霞何成王延峰吴庭芳
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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