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Dynamic matrix control method for asynchronous motor

A dynamic matrix control, asynchronous motor technology, applied in motor control, AC motor control, control system, etc., can solve problems such as weak anti-interference ability, poor adaptability to load changes, and system parameter changes

Active Publication Date: 2018-12-14
SHANGHAI INST OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the system has disadvantages such as being easily affected by system parameter changes, poor adaptability to load changes, and weak anti-interference ability.
In occasions that require high precision and rapidity, satisfactory results are often not achieved

Method used

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  • Dynamic matrix control method for asynchronous motor
  • Dynamic matrix control method for asynchronous motor
  • Dynamic matrix control method for asynchronous motor

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Embodiment Construction

[0084] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0085] The invention provides a dynamic matrix control method for an asynchronous motor, comprising:

[0086] Step S1, performing linearization and discrete processing on the control object equation to obtain a discrete mathematical model of the control object;

[0087] Step S2, according to the discrete mathematical model of the control object, use the dynamic matrix to obtain the predicted values ​​of the state variables at different times in the prediction domain at time k;

[0088] Step S3, performing mathematical transformation on the discrete mathematical model according to the control in step S1, combined with the predicted value of the state variable obtained in step S2, to obtain the optimal control amount and real-time c...

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Abstract

The invention provides a dynamic matrix control method for an asynchronous motor. Firstly, a control object equation is linearized and discretized. According to the discrete mathematical model of thecontrol object, the different predictive values of k time in the predictive domain are obtained, and then the optimal control quantity and the timely control quantity for the control object are obtained, and the predictive values of the state variables at the next time are obtained. The control object is approached by BP neural network, and the real-time control quantity is applied to the controlobject. On the basis of the detailed derivation of the dynamic matrix control prediction model and the characteristic analysis of the rolling optimization, the invention adopts the finite time domainrolling optimization and the feedback correction to realize the fast and stable tracking of the current. It has a relatively good control effect and very good parameter robustness.

Description

technical field [0001] The invention relates to a dynamic matrix control method of an asynchronous motor. Background technique [0002] The current loop control methods of asynchronous motor mainly include PI control, synovial film variable structure control, predictive control and so on. PI control is a linear controller with simple structure, easy to realize, and good dynamic performance. However, the system has disadvantages such as being easily affected by system parameter changes, poor adaptability to load changes, and weak anti-interference ability. In the occasions requiring high precision and rapidity, satisfactory results are often not achieved. Contents of the invention [0003] The purpose of the present invention is to provide a dynamic matrix control method for an asynchronous motor. [0004] The invention provides a dynamic matrix control method for an asynchronous motor, comprising: [0005] Step S1, performing linearization and discrete processing on th...

Claims

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Application Information

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IPC IPC(8): H02P25/02H02P23/00
CPCH02P23/0004H02P25/02H02P23/0018H02P2207/00
Inventor 宗剑石弘洋任林闫娜云董建功
Owner SHANGHAI INST OF TECH
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