Control device and control method used for multi-dimensional random vibration test

A random vibration test and control device technology, applied in vibration test, measuring device, comprehensive factory control, etc., can solve the problems that self-spectrum elements and cross-spectrum elements cannot be controlled at the same time, and diagonal elements have negative values, so as to ensure accuracy and Real-time, high openness, high reliability effect

Inactive Publication Date: 2011-07-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the problem that the negative value of the diagonal element appears in the spectral matrix correction process...

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  • Control device and control method used for multi-dimensional random vibration test
  • Control device and control method used for multi-dimensional random vibration test
  • Control device and control method used for multi-dimensional random vibration test

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation examples.

[0036] figure 1 Shown is a structural block diagram of the multi-dimensional random vibration test control device of the present invention. The display interaction module ① and the calculation control module ② are composed of PC or industrial computer, and the computer plays the role of the upper computer in the test control device. The display interaction module ① mainly provides human-computer interaction interface and data curve display function, and the calculation control module ② includes the multi-dimensional random vibration test control algorithm based on matrix power operation according to the present invention. These two modules are developed by software and controlled by computer. Control software integration is realized.

[0037] The signal acquisition and processing module ③ and the signal output module ④ are compose...

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Abstract

The invention discloses a control device and a control method used for a multi-dimensional random vibration test. The device comprises a Personal Computer (PC) or an industry control computer and a VXI measurement and control system. The PC or the industry control computer comprises a display interactive module and a calculation control module. The method comprises the following steps of: setting the condition of the multi-dimensional random vibration test, and the reference spectrum matrix of a controlling point; calculating a frequency domain driving signal by the calculation control module; generating continuous time domain random driving signals, and driving the vibration of the controlled objective; forming a control spectrum matrix; calculating an error matrix between the control spectrum and the reference spectrum on each control frequency point; judging the threshold value of the error matrix; modifying the spectrum modified matrix in an iterative manner; and calculating a new random driving signal of the modified matrix. The control device and the control method have high performance in the functions of collecting and processing the dynamic signal and generating the arbitrary waveform with high stability, reliability and openness, and can ensure the precision and the real-time performance of collecting the vibration response signal and transmitting the driving signal.

Description

technical field [0001] The invention relates to a vibration control device for random vibration tests of multi-axis and multi-vibration tables, and a corresponding vibration control method. Background technique [0002] Vibration environment test technology is widely used in practical projects in many fields such as aviation, aerospace, military equipment, and various national economic industries. With the continuous improvement of product performance and reliability requirements in various industries, the simulation requirements for vibration tests are also increasing. come higher. The broadband random vibration test can stimulate multiple modes of the specimen to participate in the vibration at the same time in a short period of time, and can more realistically simulate the possible faults of the specimen in the actual random vibration environment, becoming an effective means of vibration environment testing. [0003] The multi-dimensional random vibration test control de...

Claims

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Application Information

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IPC IPC(8): G05B19/418G01M7/06
CPCY02P90/02
Inventor 贺旭东崔旭利陈怀海
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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