Small-sized micro-vibration measurement and control system
A control system and micro-vibration technology, applied in the direction of non-electric variable control, control/regulation system, mechanical vibration control, etc., to achieve high reliability, flexible installation form, and achieve the effect of vibration suppression
Inactive Publication Date: 2013-09-25
BEIHANG UNIV
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[0004] At present, there is no literature report on this kind of micro-vibration measurement and control system at home and abroad.
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[0025] Such as figure 1 , 2 , 3, a small micro-vibration measurement and control system of the present invention includes: four load plate through holes 1, fastening bolts 2, load plate 3, four folding beams 4, piezoelectric actuator 5, base 6 , four base through holes 7, piezoelectric sensor 8, beam 9 and data processing and control system 10; piezoelectric actuator 5 and piezoelectric sensor 8 are d 31 type piezoelectric ceramic element, the load plate 3 is circular, as attached figure 2 As shown, there are eight countersunk holes on it to connect the piezoelectric folding beams 4, and the four piezoelectric folding beams 4 are located between the upper surface of the base 6 and the lower surface of the load plate 3, and are distributed along the circumference of the lower surface of the load plate 3. cloth, the base 6 is a square frame, see attached image 3 As shown, there are four arc-shaped gaps on its inner edge, eight sinking through holes on the frame are used to ...
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The invention relates to a small-sized micro-vibration measurement and control system. The small-sized micro-vibration measurement and control system comprises a base, a load tray, folded beams, piezoelectric sensors, piezoelectric actuators and a data processing and control system. The folded beams comprise two cross beams, the upper surface and the lower surface of each cross beam are respectively provided with a layer of piezoelectric patch, the outer-layer piezoelectric patches are used as the piezoelectric actuators, and the inner-layer piezoelectric patches are used as the piezoelectric sensors. The folded beams are arranged between the load tray and the base and connected with the load tray and the base through bolts in a pressed mode. The four folded beams are evenly distributed on the lower surface of the load tray along the periphery, and the eight piezoelectric sensors distributed on the folded beams can measure three dynamic forces and three dynamic bending moments of a load disturbance source. After signals measured by each piezoelectric sensor are processed by the data processing and control system, specific control voltage is output to the piezoelectric actuators which are arranged in parallel with the piezoelectric sensors, and therefore load vibration can be restrained. The small-sized micro-vibration measurement and control system can effectively measure load vibration and restrain transmission of load vibration, and is high in reliability.
Description
technical field [0001] The invention relates to a small-scale micro-vibration measurement and control system, which can be used for dynamic measurement of the vibration signal of the micro-disturbance load of the spacecraft component on six degrees of freedom and suppress the transmission of the vibration. Background technique [0002] Most of the current spacecraft are large-scale flexible deployment mechanisms with a large number of optical elements, which have high requirements for pointing accuracy and stability. In addition, in the attitude control system of modern spacecraft, reaction wheels, single-frame moment gyroscopes and solar wing drive mechanisms are important components in the control system. While they provide the necessary control power, they will also cause some harmful vibrations ( For simplicity, the above three systems are collectively referred to as disturbance sources below). These disturbances are mainly caused by flywheel unbalance, bearing disturba...
Claims
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Login to View More IPC IPC(8): G01H11/08G05D19/02
Inventor 王云峰程伟夏明一
Owner BEIHANG UNIV