Node vibration control method and device of structure and application of device

A technology of structural vibration and controller, which is applied in the direction of mechanical vibration control, non-electric variable control, comprehensive factory control, etc., can solve the problems of slow convergence speed of structural response and oscillation, and achieve improved vibration suppression effect, stable convergence process, and convergence fast effect

Inactive Publication Date: 2013-07-17
XI AN JIAOTONG UNIV
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Problems solved by technology

The problem with the existing feedback harmonic cancellation (FHC) algorithm (Veres, S., Adaptive harmonic control. International Journal of Control, 2001.74(12): p.1219-1225.) is that the iteration coefficient μ is A fixed value, in the iterative process, the convergence speed of the structural response is slow or even oscillation occurs

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  • Node vibration control method and device of structure and application of device
  • Node vibration control method and device of structure and application of device
  • Node vibration control method and device of structure and application of device

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Embodiment Construction

[0021] Such as figure 1 As shown, the multi-node network vibration suppression device involved in the present invention includes a display and control unit, a communication bus, n node suppression units (node ​​vibration controllers) and corresponding n vibration suppression objects (node ​​a-1, a -2,...,a-n), n≥2. The display control unit uses a PC as a platform, and uses a communication bus to connect with each node suppression unit (No. 1-N), which plays the role of global detection of vibration suppression objects and global vibration suppression. The communication bus includes a usb bus to CAN bus converter and a CAN bus connected to each node suppression unit.

[0022] Each node suppression unit takes the DSP processor as the core, and the programmable logic device PLD is connected to the DSP through a 16-bit data bus and a 19-bit address bus. The vibration response data of a node of the vibration suppression object is obtained through the data acquisition module. With ...

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Abstract

The invention discloses a node vibration control method and device of a structure and an application of the device. A vibration controller with a digital signal processor (DSP) serving as a core is used, vibration response data of a certain node structure are received by a data acquisition module in the controller, a sum wi of the node structure is output after the vibration response data are analyzed by a display and control unit, the vibration response data of the node structure are converted into a frequency domain response signal Y(ejw), according to an improved feedback harmonic frequency suppression algorithm, amplitudes and phases of at least three orders of main sinusoidal components of the Y(ejw) are calculated, a frequency domain control signal U(ejw) is synthesized through a signal synthesis module under the assistance of a programmable logic device (PLD), and the U(ejw) is output to the node to control the vibration of the node, so that the response of the node is reduced, and the local suppression effect is achieved.

Description

technical field [0001] The invention relates to a vibration control method for local nodes of a structure, a vibration controller and an application in a multi-node network vibration suppression system of a large flexible structure. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D19/02G05B19/418E04B1/98
CPCY02P90/02
Inventor 闫桂荣罗景琳董龙雷葛成伟刘振李浩
Owner XI AN JIAOTONG UNIV
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