A fuzzy method for active shock resistance for complex vibration isolation systems of power plants

A technology of vibration isolation system and fuzzy method, applied in the directions of propulsion engine, transportation and packaging, non-rotation vibration suppression, etc., can solve the problems of vibration can only be controlled at a single frequency, the effect is limited, etc., to achieve protection safety, response time Short, controlled effect Enhanced effect

Inactive Publication Date: 2015-09-30
海南自由贸易试验区泛亚哈工技术转移转化有限公司
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Problems solved by technology

Its essence is a passive vibration absorber with adjustable natural frequency, which does not require active force, but has the following limitations: vibration can only control a single frequency, and shock control can only absorb single-frequency energy, and the effect is limited.

Method used

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  • A fuzzy method for active shock resistance for complex vibration isolation systems of power plants
  • A fuzzy method for active shock resistance for complex vibration isolation systems of power plants
  • A fuzzy method for active shock resistance for complex vibration isolation systems of power plants

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Embodiment Construction

[0024] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0025] to combine Figure 1~5 , The device involved in the present invention mainly includes: electromagnetic active vibration absorber, power amplifier, data acquisition control card, computer, acceleration sensor for picking up impulse, charge amplifier, eddy current displacement sensor and other components.

[0026] The arrangement method is as follows: the data acquisition control card communicates with the microcomputer to form a controller; and the signal output terminal is connected with the electromagnetic vibration absorber after passing through the power amplifier. Install the shock absorber on the protected equipment, arrange the acceleration sensor and eddy current displacement sensor on the base of the equipment, connect the acceleration sensor to the charge amplifier, and connect it to the data acquisition terminal of the data acquisition control car...

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Abstract

The invention aims to provide an active impact-resistant fuzzy method suitable for a complicated vibration isolation system of a power plant. The method comprises the following steps: an acceleration signal at a base of the power plant is collected, and whether the system is impacted is judged; when the value of the acceleration of the base exceeds a set threshold value, an impact active control module is entered; the input acceleration signal and a signal of the rate of change of the acceleration are fuzzified; according to the obtained result, by searching a fuzzy control rule table, a fuzzy output value of a control signal is obtained; a defuzzification interface is completed by using a triangular membership function of the control signal, and an impact control signal is obtained; the impact control signal is input into an active vibration absorber after being subjected to power amplification by a power amplifier, and when the value of the acceleration of the base and the rate of change of the acceleration are both less than set threshold values, the impact response is ended. With the adoption of the method, the system can have stronger impact-resistant capability, the response time is short, the instantaneity requirement of the impact control is met; and after the method is used, the impact-resistant capability of the complicated vibration isolation system can be effectively improved.

Description

technical field [0001] The invention relates to a method for resisting vibration and shock, in particular to an active method for resisting vibration and shock. Background technique [0002] The power plant is the equipment and device that converts other energy sources into kinetic energy. It is the "heart" of the industry, and its safety has attracted much attention. The power plant is also the main source of vibration and noise. Vibration and noise deteriorate people's living and working conditions and form pollution. In the field of ships, vibrations form acoustic radiation through the hull to the underwater, polluting the underwater acoustic environment. [0003] Vibration control has always been a research hotspot and difficulty in the field of power engineering. The main methods are vibration isolation, vibration absorption, vibration elimination, vibration resistance and changing dynamic parameters. Passive control is the first choice for vibration control. It does n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63H21/30F16F15/03
Inventor 李玩幽刘子豪胡云波率志君王东华卢熙群柴卓野张相彬
Owner 海南自由贸易试验区泛亚哈工技术转移转化有限公司
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