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Self-adaptive control method and self-adaptive control device

A technology of adaptive control and adaptive filter, which is applied in the direction of adaptive control, general control system, control/regulation system, etc., and can solve problems such as inappropriate algorithms

Inactive Publication Date: 2012-08-08
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

When the error e(i) is small, the fixed initial amplitude range setting makes the algorithm have a fixed error range. When a high-precision error range is required, this algorithm is obviously inappropriate

Method used

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Embodiment Construction

[0061] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0062] The embodiment of the present invention is based on the DCD-ERLS algorithm.

[0063] The DCD-ERLS algorithm is based on the exponentially weighted recursive least squares (ERLS) algorithm, and uses the dichotomous coordinate descent (DCD) algorithm to solve the most complicated step in the ERLS algorithm, thereby simplifying the algorithm. Similarly, the DCD algorithm can also be applied to the APA algorithm, that is, the DCD-APA algorithm.

[0064] Figure 2A It is a realization block diagram of the exponentially weighted recursive least squares method ERLS algorithm adopted in the embodiment of the present invention. As shown in the figure, among them, Figure 2A The output signal u(i) in is figure 1 The output signal u(i) in . The specific implementation process of the ERLS algorithm is as follows: Fi...

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Abstract

The invention relates to a self-adaptive control method and a self-adaptive control device, wherein the method comprises the steps of: calculating the errors of an excepting signal and an estimating signal fed back by an output signal and calculating an error vector according to the errors; according to iteration times and the errors, calculating and updating the iteration times, and / or according to an amplitude range and the errors, calculating and updating the amplitude range; iteratively calculating the variables of self-adaptive filter coefficients according to the auto-correlative matrix of an output vector formed by the output signal, the iteration times and the amplitude range; updating the self-adaptive filter coefficients according to the variables of the self-adaptive filter coefficients; and processing the output signal by a self-adaptive filter to obtain the estimating signal fed back by the output signal. Therefore, the invention discloses a self-adaptive control method and a self-adaptive control device; in the method, two parameters, i.e. amplitude range and iteration times, are calculated according to an error signal, so that the parameters vary along with the variation of error, thus self-adaptively regulating the rate of convergence, the stable-state error and the algorithm complexity of the algorithm.

Description

technical field [0001] The invention relates to the field of adaptive signal processing, in particular to an adaptive control method and device. Background technique [0002] Adaptive filter theory is a branch of the field of adaptive signal processing, which can automatically and iteratively adjust its own filter parameters to meet the requirements of certain criteria, thereby achieving optimal filtering. Adaptive filtering algorithm is an important part of the adaptive filter design process. The quality of the adaptive algorithm determines the quality of the adaptive filter. [0003] figure 1 It is a schematic diagram of an adaptive control system in the prior art. As shown in the figure, the input signal x(i) is enhanced through the forward path G to obtain the output signal u(i). The output signal returns to the input signal through the feedback path H to form the expected signal d(i) of the output signal feedback, and at the same time u(i) passes through the adaptiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
Inventor 董超洪缨高丽张铁军
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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