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

An active control and alternating drive technology, applied in computer control, program control, general control system, etc., can solve problems such as low natural frequency, dense mode, small damping, etc., to improve dynamic response speed, reduce thermal hysteresis, The effect of suppressing vibration

Inactive Publication Date: 2012-07-18
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
Comparison scheme
Effect test

Embodiment 1

[0030] see figure 1. The shape-memory alloy driving device for the active control of the vibration of the sensitive structure includes a fixed support frame (1), an experimental model structure (3) equipped with a multi-channel shape-memory alloy driving unit (2), and 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 multi-group PZT sensor networks (8), a An exciter (9), a plurality of charge amplifiers (10), a high-performance computer (11) and a digital oscilloscope (12), are characterized in that the computer (11) alternately drives a constant current through two multiple channels The source (7) is connected to the multi-channel shape memory alloy drive unit (2), the computer (11) has an acquisition card and is connected to the digital oscilloscope (12), and the A / D data acquisition card (4) is connected to the multi-channel charge amplifier...

Embodiment 2

[0032] This embodiment is basically the same as Embodiment 1, and the special features are as follows: see figure 1 with 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 its front panel is provided with four constant current source output interfaces. And LCD display, the rear panel is equipped with power interface, fan equipment, and serial 485 communication interface; the single-chip microcomputer (1￠) and peripheral circuit: a PA / PB pin of a Microchip company's PIC18F4620 single-chip microcomputer (1￠) The D / A conversion chip TLC5615 (2￠) and the reference voltage chip LM385-2.5 (3￠) are connected to form a digital-to-analog conversion circuit, and an amplifier OP07 (4￠) is connected to an amplifier and follower circuit, and the amplifier OP07 (4￠) ) through a TI company power ampl...

Embodiment 3

[0034] Such as figure 1 As shown, a kind of SMA alternate driving device with active control of smart structure, the inventive device is mainly composed of a fixed support structure (1), an experimental model structure (3) equipped with multiple SMA driving units (2), an A / D data acquisition Card (4) (model: PCI-1712, manufacturer: Advantech Technology Co., Ltd.), an arbitrary function signal generator (5) (model: Angilent-33220A, manufacturer: Agilent Instruments Co., Ltd.), a signal power amplifier ( 6) (Model: YE5872 Production unit: Jiangsu Lianeng Electronic Technology Co., Ltd.), two multi-channel alternating drive constant current sources (7), a set of multi-group PZT sensor networks (8), a vibrator (9) (Model: JZK-10 Manufacturer: Jiangsu Lianeng Electronics Co., Ltd.), multi-channel charge amplifier (10) (Model: YE5852A Manufacturing unit: Jiangsu Lianeng Electronics Co., Ltd.), a high-performance computer (11) (Model: I500-7255 production unit: Founder Technology G...

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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 composite SMA 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 most convention...

Claims

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Application Information

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Patent Type & Authority Applications(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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