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Multi-dimensional random vibration control method

A random vibration, multi-dimensional technology, used in mechanical oscillation control, non-electric variable control, control/regulation systems, etc., can solve problems such as difficulty in meeting real-time requirements and slow processing speed

Active Publication Date: 2013-05-08
BEIJING INST OF STRUCTURE & ENVIRONMENT ENG +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved in the present invention is that the existing multi-dimensional random vibration control methods all use the upper control computer to correct the signal, the processing speed is slow, and it is difficult to meet the real-time requirements

Method used

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Embodiment 1

[0068] Such as figure 1 As shown, the multidimensional random vibration control method of the present invention comprises the following steps:

[0069] Step (1) Set the reference spectral matrix and the number of control spectral lines

[0070] The operator sets the reference spectral matrix R and the number of control spectral lines nSL through the control computer as the host computer, the control computer transmits the reference spectral matrix R to the multi-dimensional random vibration signal processing module, and the control computer transmits the control spectral line number nSL to the random signal source.

[0071] Step (2) Generate a true random drive signal

[0072] Step (2.1) The random signal source sends out a low-level white noise signal, performs D / A conversion and low-pass filtering in sequence, and amplifies the power of the low-pass filtered signal. In this embodiment, the D / A conversion, low-pass filtering and power amplification are completed sequential...

Embodiment 2

[0112] The difference between this embodiment and embodiment 1 is:

[0113] In step (2.5.1), randomly generate a set of position random numbers and a set of reverse random numbers. In step (2.5.2), the value of the corresponding position of the pseudo-random sequence and the value after this position are obtained through the random number of the position. A set of sequences is formed by the numerical values ​​of positions; the reverse random number is multiplied by a set of sequences of random numbers corresponding to the positions to obtain a new set of sequences. In step (2.5.3), windowing is performed on a new set of random numbers corresponding to the same position, and the windowing type is optional, such as half-sine window, Hamming window, Haining window, etc. In step (2.5.4), different groups of new sequences corresponding to random numbers at different positions are overlapped at a ratio of 50% to obtain a true random driving signal.

[0114] In step (3.5.1), random...

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Abstract

The invention belongs to the technical field of structural strength and environment reliability tests, in particular to a multi-dimensional random vibration control method. The method comprises the steps of setting a reference spectrum matrix and the number of control spectral line number; generating real random drive signals; calculating a control spectrum matrix, and driving and rectifying the real random drive signals; and returning to the former step until the control spectrum matrix is located in a tolerance zone of the reference spectrum matrix. The method solves the technical problem that an existing multi-dimensional random vibration control method is slow in processing speed. According to the method, a multi-dimensional random vibration signal processing module is used to rectify the signals, and the signals do not need transmitting from a lower computer to an upper computer to be rectified, processing speed is improved, and real-time requirements are better met.

Description

technical field [0001] The invention belongs to the technical field of structural strength and environmental reliability tests, and in particular relates to a multidimensional random vibration control method. Background technique [0002] The real vibration environment is excited by multiple degrees of freedom, while the traditional environmental simulation test only provides one-way excitation. However, there is a certain difference between the modal excitation obtained by the product under multi-dimensional excitation and the modal excitation obtained under single-dimensional excitation, which leads to the fact that the use of a single-dimensional shaking table to simulate the actual multi-dimensional vibration environment often cannot meet the test requirements. Therefore, it is necessary to carry out research on multi-dimensional vibration control technology. The existing multi-dimensional random vibration control methods all use the upper control computer to correct th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D19/02
Inventor 王璟南祝济之师培峰
Owner BEIJING INST OF STRUCTURE & ENVIRONMENT ENG
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