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SMA (shape memory alloy) alternate drive device and method for vibration active control of sensitive structure

A technology of active control and alternating drive, applied in computer control, program control, general control system, etc., can solve the problems of low natural frequency, dense modal, difficult to meet the control requirements of vibration control method, to improve the dynamic response speed, The effect of reducing thermal hysteresis and good driving effect

Inactive Publication Date: 2014-06-11
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of aerospace technology, there are more and more large flexible structures in the composition and application of spacecraft, such as solar panels, large satellite antennas, space manipulators, etc. , because the above space flexible structure needs to ensure high operating accuracy during long-term operation, it usually has extremely strict requirements on the vibration environment, and this type of structure generally has the characteristics of low stiffness and small damping, low natural frequency and dense modes. At the same time, the space environment has no external resistance, so it is very susceptible to vibration due to disturbance, and makes it difficult for most conventional vibration control methods to meet the control requirements

Method used

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  • SMA (shape memory alloy) alternate drive device and method for vibration active control of sensitive structure
  • SMA (shape memory alloy) alternate drive device and method for vibration active control of sensitive structure
  • SMA (shape memory alloy) alternate drive device and method for vibration active control of sensitive structure

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Experimental program
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Effect test

Embodiment 1

[0030] see figure 1. The shape-memory alloy driving device for the active control of the sensitive structural vibration includes a fixed support frame (1), a model structure 3 equipped with a multi-channel shape-memory alloy driving unit 2, an A / D data acquisition card 4, an arbitrary Function signal generator 5, a signal power amplifier 6, two multi-channel alternate driving constant current sources 7, a set of multiple groups of PZT sensor networks 8, an exciter 9, multiple charge amplifiers 10, a computer 11 And a digital oscilloscope 12, it is characterized in that described computer 11 connects multi-channel shape memory alloy driving unit 2 through two multi-channel alternate driving constant current sources 7, computer 11 has acquisition card and connects digital oscilloscope 12, A / D The data acquisition card 4 is connected to multiple sets of PZT sensor networks 8 through the multi-channel charge amplifier 10, and the multiple sets of PZT sensor networks 8 are pasted...

Embodiment 2

[0032] This embodiment is basically the same as Embodiment 1, and the special features are as follows: see figure 1 and figure 2 , the multi-channel alternate driving constant current source 7 is composed of an instrument shell, a single-chip microcomputer 1￠ and peripheral circuits. The instrument shell is provided with a front panel and a rear panel, and the front panel is provided with four constant current source output interfaces and a liquid crystal display, The rear panel is equipped with a power interface, a fan device, and a serial 485 communication interface; the single-chip microcomputer 1￠ and peripheral circuits: the PA / PB pin of a PIC18F4620 single-chip microcomputer 1￠ of Microchip Company is passed through a D / A conversion chip TLC5615 2￠ A digital-to-analog conversion circuit composed of a reference voltage chip LM385-2.5 3￠ connected, an amplification and follower circuit composed of an amplifier OP07 4￠ connected, the amplifier OP07 4￠ passes through a TI ...

Embodiment 3

[0034] like figure 1 As shown, a kind of SMA alternate driving device actively controlled by a smart structure, the inventive device is mainly composed of a fixed support structure 1, a model structure 3 equipped with a multi-channel shape memory alloy driving unit 2, and an A / D data acquisition card 4 (model: PCI-1712 (manufactured by: Advantech Co., Ltd.), an arbitrary function signal generator 5 (model: Angilent-33220A, produced by: Agilent Instruments Co., Ltd.), a signal power amplifier 6 (model: YE5872, produced by Jiangsu Lian Energy Electronics Technology Co., Ltd.), two multi-channel alternating drive constant current sources 7, a set of multi-group PZT sensor networks 8, a vibration exciter 9 (model: JZK-10 production unit: Jiangsu Lianeng Electronics Co., Ltd.), Multi-channel charge amplifier 10 (model: YE5852A, manufacturer: Jiangsu Lianeng Electronics Co., Ltd.), a computer 11 (model: I500-7255, manufacturer: Founder Technology Group Co., Ltd.), a digital oscillo...

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Abstract

The invention relates to an SMA (shape memory alloy) drive device and method for active control of a sensitive structure. According to the experimental device, an experimental model with multiple SMA drive units is hoisted on an aluminum alloy outer frame, and a function signal generator connected with a power amplifier drives a vibration exciter fixed on the aluminum alloy outer frame so that a body model connected with the vibration exciter generates vibration response; a piezoelectric sensor acquires a vibration response signal; and a computer with a data acquisition card inserted calculates and generates output to multiple drive constant-current sources which alternately drive the multiple SMA drive units compounded in the structure of the experimental model. According to the method provided by the invention, different control strategies are set through the control algorithm of an upper computer, and multiple SMA drive units are alternately driven by multiple drive constant-current sources to realize an effect of inhibiting the vibration response of a structure. In combination with software development and function design, the device and method completely realize multi-path multi-machine constant-current drive capability, and are convenient to use and reliable and stable, thereby providing important experiment means and composition units for the active control research on an intelligent structure based on SMA smart material.

Description

technical field [0001] The invention relates to a shape memory alloy (SMA) drive device and method for active control of a smart structure, in particular to a drive device and method for active control of a smart structure of a compound shape memory alloy drive unit. Background technique [0002] With the development of aerospace technology, there are more and more large-scale flexible structures in the composition and application of spacecraft, such as solar panels, large satellite antennas, space manipulators, etc., because the above-mentioned space flexible structures need to ensure high Running accuracy usually has extremely strict requirements on the vibration environment, and this type of structure generally has the characteristics of low stiffness and small damping, low natural frequency and dense modes. At the same time, the space environment has no external resistance, so it is extremely susceptible to disturbances and Vibration occurs, and makes it difficult for m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
Inventor 邵勇姜恩宇朱晓锦唐頔张合生
Owner SHANGHAI UNIV
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