Variable bandwidth active disturbance rejection control method

A technology of active disturbance rejection control and variable bandwidth, applied in the field of control, can solve problems such as the inability to effectively estimate time-varying disturbances, and achieve the effects of being easy to master and apply, clarifying the physical meaning, and facilitating tuning

Active Publication Date: 2020-05-08
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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Problems solved by technology

[0005] Aiming at the problem that the fixed-bandwidth observer cannot effectively estimate the time-varying disturbance, the present invention proposes a variable-bandwidth linear active disturbance rejection contr

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  • Variable bandwidth active disturbance rejection control method
  • Variable bandwidth active disturbance rejection control method
  • Variable bandwidth active disturbance rejection control method

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[0035] In order to understand the above objects, features and advantages of the present invention more clearly, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

[0036] Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. Example limitations.

[0037] The present invention improves linear expansion state observers, especially the ability of expanded state observers to estimate time-varying disturbances. Specifically, it is a new extended...

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Abstract

The invention discloses a variable bandwidth active disturbance rejection control method, which comprises the following steps of: designing a linear extended state observer with a fixed bandwidth fora first-order controlled object; constructing a variable bandwidth extended state observer on the basis of the linear extended state observer with the fixed bandwidth; establishing an active disturbance rejection control law, and constructing a variable bandwidth active disturbance rejection controller based on the variable bandwidth extended state observer; and adjusting parameters of the variable bandwidth active disturbance rejection controller until a satisfactory control effect is obtained. According to the variable bandwidth active disturbance rejection control method of the invention, the bandwidth of the observer can be adjusted in real time according to the change of the estimation deviation, so as to improve the estimation capability of the observer for time-varying disturbance or sudden disturbance, reduce the estimation deviation, and improve the control precision.

Description

technical field [0001] The invention belongs to the technical field of control, and in particular relates to an extended state observer based on a variable bandwidth mechanism and a reactive control method based on the observer. Background technique [0002] Linear Active Disturbance Rejection Control (ADRC) technology has attracted extensive attention at home and abroad in recent years due to its advantages such as low dependence on plant model information and strong anti-disturbance capability. At the same time, the proposed bandwidth parameterization method further reduces the number of adjustable parameters and accelerates the popularization and application of ADRC in control engineering. However, the linear extended state observer, which is the core of the linear ADRC technology, has insufficient ability to estimate time-varying disturbances, which has become the key to restricting the performance of the linear ADRC. [0003] A fixed-bandwidth linear extension state ob...

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 魏伟左敏张志远
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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