Vibration non-contact active control device and method based on novel multi-chip combinational driver structure

Abstract

The invention relates to a vibration non-contact active control device and a method based on a novel multi-chip combinational driver structure. The device comprises an industrial personal computer, a wireless sensing device, a composite material flexible curved shell, a novel multi-chip combinational driver structure and a UV-LED (Ultraviolet-Light Emitting Diode) power module, wherein the composite material flexible curved shell is clamped to a mechanical clamping device. According to the method, a laser vibration measuring instrument is used for realizing non-contact high-precision measurement of vibration on a body surface, and the emitted ultraviolet light is interactively and vertically irradiated on the new multi-chip combinational driver structure on the upper and lower surfaces of the flexible curved shell of the flexible composite material by switching conduction switches of the UV-LED power module and adjusting the frequency of the incidence light intensity. By adopting the vibration active control system, the low-frequency (below 100Hz) vibration non-contact active control of the flexible structure can be realized, the conductor connection is reduced, the electromagnetic interference of aviation and aerospace structures is lessened, and the poor working environment of a complex structure can be improved.

Description

technical field [0001] The invention belongs to the technical field of vibration control, and in particular relates to a vibration non-contact active control device and method based on a novel multi-plate combined driver configuration. Background technique [0002] With the rapid development of aerospace technology, the scale of human space activities is expanding day by day, and the performance requirements for space structures will become more and more stringent. At present, there are more and more flexible components in aviation and aerospace structures. These large space flexible structures are usually made of lightweight composite materials. For the precise operation and normal operation of aviation and aerospace structures, there are many examples at home and abroad that the performance of the entire aerospace structure is degraded or even paralyzed due to the vibration of flexible bodies. For example, the rotating structure of the Landsat II observatory launched by t...

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Problems solved by technology

[0004] Looking at the existing research work on the non-contact active control of vibration of flexible curved shells made of composite materials, there is still a thorny problem: that is, the membrane control force of the PLZT actuator is unidirectional.

Existing theoretical studies all believe that the positive and negative of the film control force generated by the PLZT actuator can be changed by the irradiation direction of ultraviolet light like the control torque, but this is completely a "true lie" caused by the separation of theory and experimental research. The latest experimental research shows that no matter the upper or lower surface is irradiated, the film control force generated by the PLZT driver is always positive, that is, the photoinduced voltage direction of the PLZT driver is always consistent with its polarization direction, so the PLZT driver can only elongate under the irradiation of ultraviolet light. , cannot be shortened, and its deformation mode has nothing to do with the irradiation direction of ultraviolet light and the polarization direction of the driver! In view of the fact that the thin-film control force plays a dominant role in the active control of curved shell vibration, the thin-film control force generated by the PLZT driver is unidirectional

Develop a new composite driving method based on multi-chip PLZT with different polarization directions, and then solve the problem that the excitation force of the PLZT driver is one-way, which has not been reported

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