Real-time controlling system of intelligent active vibration isolation unit

Abstract

A real-time controlling system used for controlling an intelligent active vibration isolation unit comprises an intelligent active vibration isolation unit, a base, a DSP vibration controlling card, a piezo-electricity type accelerating sensor, a signal collecting device and a signal conditioning device, wherein, the intelligent active vibration isolation unit is fixed on the base; when the base is vibrated, the signal collecting device collects two error signals and one vibration source signal on the horizontal and vertical planes of the intelligent active vibration isolation unit transmitted from the vibration source detected by the piezo-electricity type accelerating sensor, and all the three signals enter the DSP vibration controlling card; after the three signals are calculated through the control algorithm in the DSP vibration controlling card, two signals to be controlled are outputted and processed through the signal conditioning device, and the two signals to be controlled are outputted to two giant magnetostrictive actuators in the intelligent active vibration isolation unit in the horizontal direction and in the vertical direction, thereby generating relevant extension and shrinkage and realizing the active vibration control of the intelligent active vibration isolation unit. The invention has the advantages of quick speed, real time and high precision.

Description

technical field [0001] The invention belongs to the field of engineering vibration isolation and relates to a system for real-time control of an intelligent active vibration isolation unit. Background technique [0002] With the development of ultra-precision machining, ultra-precision measurement technology and aerospace technology, the influence of micro-amplitude and ultra-micro-amplitude vibration has become very prominent, especially ultra-precision machining below sub-micron requires an ultra-quiet environment for protection, so research on micro The active vibration isolation of amplitude and ultra-slight amplitude is of great significance. At the same time, whether it is a large-scale spacecraft structure, a large modular space station, a solar panel, a satellite antenna, or an optical system and its support structure, higher requirements are placed on the load-bearing capacity of the vibration isolation structure, that is, in low frequency, Under the action of larg...

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Problems solved by technology

[0003] However, the current intelligent active vibration isolation units are difficult to achieve both in terms of bearing capacity and vibration isolation accuracy.

With the increase of the bearing capacity of the intelligent active vibration isolation unit, the vibration isolation accuracy is often affected by it and there is a big difference

In addition, the existing intelligent active vibration isolation unit control systems are mostly composed of industrial control machines, A / D and D / A cards. The entire control system is bulky, has poor anti-interference ability, complex operation, and does not have fast control functions.

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