An Active Control Method for Structural Vibration Based on Time-Frequency Domain Hybrid Adaptive Filtering

A technology of adaptive filtering and structural vibration, applied in the directions of adaptive control, mechanical oscillation control, non-electric variable control, etc., can solve the problem of slow update of the secondary channel of online identification, and reduce the computational complexity and the amount of calculation. , to ensure the effect of tracking speed

Active Publication Date: 2017-12-15
北京德润自控科技有限公司
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Problems solved by technology

[0007] In order to avoid the deficiencies of the prior art, the present invention proposes a structural vibration active control method based on time-frequency domain hybrid adaptive filtering, aiming at the high computational complexity of the time-domain adaptive filtering method and the online identification of secondary channels by the frequency domain control method The disadvantage of slow update, taking into account the calculation efficiency and control effect

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  • An Active Control Method for Structural Vibration Based on Time-Frequency Domain Hybrid Adaptive Filtering
  • An Active Control Method for Structural Vibration Based on Time-Frequency Domain Hybrid Adaptive Filtering
  • An Active Control Method for Structural Vibration Based on Time-Frequency Domain Hybrid Adaptive Filtering

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[0057] The present embodiment takes the vibration control system of the piezoelectric cantilever beam that simulates the wing as an example, and the description is as follows in conjunction with the accompanying drawings:

[0058] refer to figure 1 with Figure 5 As shown, the active control method of structural vibration of the time-frequency domain hybrid adaptive filter is specifically the active control method of the vibration of the piezoelectric cantilever beam that simulates the wing of the aircraft. The specific control operation steps are as follows:

[0059] 1. Magnets are attached to the surface of the piezoelectric cantilever beam structure and piezoelectric ceramic sheets arranged in a distributed patch form constitute the vibration control system of the piezoelectric cantilever beam;

[0060] 2. Configure the data acquisition card, arbitrary waveform generator and controller on the PXI industrial computer for the output of excitation signals, the collection of v...

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Abstract

The invention relates to a structural vibration active control method for time-frequency domain hybrid self-adaptive filtering, which combines the advantages of time domain and frequency domain self-adaptive filtering methods, adopts a frequency domain LMS algorithm for updating a weight coefficient of a main channel self-adaptive filter, namely, utilizes a 1 / 2 overlapping-reserving method and a fast Fourier transform (FFT) technology, replaces linear convolution with sequential cyclic convolution, greatly reduces calculation workload, adopts a time domain LMS algorithm for identifying a secondary channel model online in real time, increases a tracking speed of model variation, reduces calculation complexity of the algorithms integrally, and ensures a tracking speed of secondary channel variation.

Description

technical field [0001] The invention belongs to the field of active vibration control (AVC), and relates to a structural vibration active control method of time-frequency domain hybrid adaptive filtering. Background technique [0002] In recent years, the active control method based on structural vibration has made outstanding progress. This control method has good low-frequency vibration suppression effect and strong adaptability to the environment. It is currently one of the most ideal vibration suppression methods. Among them, adaptive filter feedforward control technology has become an important method for active control of structural vibration because of its advantages of less calculation and easy implementation. The core idea of ​​this type of method is to design an adaptive filter to output a control signal, and to generate a control force acting on the structure through the actuator to offset the influence of external disturbances and achieve the purpose of eliminati...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D19/02G05B13/04
CPCG05B13/04G05D19/02
Inventor 唐炜王波王德保
Owner 北京德润自控科技有限公司
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