Multi-node network vibration abatement device and method

Abstract

The invention discloses a multi-node network vibration abatement device and method. The multi-node network vibration abatement device comprises a display and control unit, a communication bus and a plurality of node abatement units. A personal computer (pc) serves as the platform of the display and control unit, all structural point transfer characteristic estimation and control frequency wi are transmitted to all the node abatement units through the communication bus, response of all structural points is monitored in real time, and accordingly the global control effect is achieved. A digital signal processor (DSP) serves as the core of the node abatement units, control signals U (ejw) are calculated through real-time iteration by measuring certain point structure response Y (ejw) in the improved feedback harmonic frequency abatement algorithm and the evaluation criteria that a mode of the structure response Y (ejw) is the minimum, response of a certain structural point is reduced, and accordingly the local abatement effect is achieved.

Description

technical field [0001] The invention relates to a multi-node network vibration suppression device and vibration suppression method for suppressing large flexible structures. Background technique [0002] Large flexible structures are widely used in engineering, such as satellite antennas, suspension bridges, etc. In order to suppress the vibration of large flexible structures under disturbance excitation and maintain their geometry (especially satellite antennas), some control methods are needed. Existing methods usually adopt a main control point to suppress the vibration of the whole structure locally, but for the complex whole structure, the control effect achieved by one control point often cannot meet the design requirements. [0003] During the working process, the mechanical structure mainly experiences random vibration, but it is worth pointing out that the vibration response of the mechanical structure is a comprehensive reflection of its inherent characteristics a...

AI Technical Summary

Problems solved by technology

Existing methods usually use a main control point to suppress the vibration of the overall structure locally, but for complex structures, the control effect achieved by one control point often cannot meet the design requirements

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