Bending and torsional vibration detection and control device and method based on flexible hinged plate

Abstract

The invention discloses a bending and torsional vibration detection control apparatus and method based on a flexible articulated slab. The bending and torsional vibration detection control apparatus comprises the flexible articulated slab, a piezoelectric ceramic sheet sensor, a piezoelectric ceramic sheet driver, an industrial camera, a piezoelectric charge type accelerometer, a computer, an optimum adjustment amplifier, a motion control card, a terminal board, a charge amplifier and a voltage amplifier, wherein the flexible articulated slab is formed by a first flexible board and a second flexible board which are connected together through hinges the piezoelectric ceramic sheet driver and the piezoelectric ceramic sheet sensor are pasted on the flexible boards, the second flexible board is provided with nine circular identifiers, and the industrial camera is arranged right before the free end of the flexible articulated slab. A binocular machine visually detects vibration of the circular identifiers on the flexible articulated slab to extract the vibration information of the articulated slab. The binocular machine realizes decoupling of bending and torsional vibration detection. In combination with an active control algorithm, active control of the bending and torsional vibration of the articulated slab structure is realized through driving control.

Description

technical field [0001] The invention relates to the field of vibration control of flexible hinged plates, in particular to a device and method for detecting and controlling bending and torsional vibrations based on flexible hinged plates. Background technique [0002] With the rapid development of the economy in the 21st century, the aerospace industry has also achieved new development. Therefore, the structure of spacecraft tends to be larger, more flexible and less rigid. The flexible structure can increase the weight of the payload and improve the efficiency of the vehicle; the large structure can increase the space function and the flexibility of the design and manufacture of the spacecraft. In the field of aerospace, there is a large number of solar panels. The actual solar panels are connected by multiple rectangular panels. One end of the first panel is connected to the spacecraft, and the other end is connected to the second panel through a hinge, and the second pa...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, when studying and simulating the bending mode and torsional mode vibration control of the solar panel structure, the influence of the stiffness of the connecting hinge is generally ignored, and the solar panel is simplified into a flexible hinged plate. Vibration measurement usually uses piezoelectric ceramic sensors, acceleration Sensors and gyroscope sensors, but these sensors are contact sensors, which will have a serious impact on the vibration of the measured object, reduce measurement accuracy, and introduce load effects

Moreover, the application of piezoelectric materials is limited due to factors such as its own strength, fatigue life, and temperature resistance; the accelerometer sensor is sensitive to noise, and there are problems such as hysteresis and temperature drift that affect its accuracy, and it can only measure a certain point on the object. Displacement, to obtain full information, several accelerometers must be arranged separately on the hinge plate

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