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Piezoelectric structure damping control object compensation method

A damping control, piezoelectric structure technology, applied in electrical program control, program control in sequential/logic controllers, piezoelectric effect/electrostrictive or magnetostrictive motors, etc. Satisfaction, etc.

Inactive Publication Date: 2012-06-20
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the experimental results are not so satisfactory
with g s g a However, the system tends to be unstable, producing high-frequency or very low-frequency self-excited vibrations, and the increment of the modal damping ratio has not yet reached the desired requirement such as 0.1

Method used

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  • Piezoelectric structure damping control object compensation method
  • Piezoelectric structure damping control object compensation method
  • Piezoelectric structure damping control object compensation method

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Embodiment Construction

[0238] See figure 2 As shown, the present invention is an object compensation method for piezoelectric structure damping control, which is illustrated by taking a beam as an example. The specific steps of the method are as follows:

[0239] Step 1: Set up the base. Take a small substrate 8, the same material and thickness as the beam 1.

[0240] Step 2: Set the animation. Stick the same actuating piece 9 as the actuating piece 2 on the beam 1 on the small substrate 8, and the actuating piece 9 and the actuating piece 2 on the beam receive the same excitation.

[0241]Step 3: Set up the sensor sheet. Paste the same measuring piece 10 as the measuring piece 3 on the beam 1 on the other side of the small substrate 8, facing the original actuating piece 9. Measuring sheet 10 is followed by operational amplifier 12 and resistor 11, the same as resistor 4 and operational amplifier 5 at the back of measuring sheet 3 on the beam 1, and measuring sheet 10, the connection relations...

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Abstract

The invention discloses a piezoelectric structure damping control object compensation method, which comprises the following: step 1, arranging a substrate; step 2, arranging an actuating piece; step 3, arranging a sensing vane; and step 4, adjusting gain g<c>. The damping control method provided by the invention overcomes the defects in the prior art, eliminates the feedback of partial excitation strain of the piezoelectric actuating piece so as to make a mathematic model of a piezoelectric structure return to a theoretical model, has skillful design and simple operation, and can be widely applied in the technical field of structural vibration active control.

Description

(1) Technical field [0001] The invention relates to a piezoelectric structure damping control method, in particular to a piezoelectric structure damping control object compensation method, which belongs to the technical field of structural vibration active control. (2) Background technology [0002] At present, the damping control of piezoelectric structures recorded in many literatures adopts a typical control mode - a closed-loop system composed of speed negative feedback. In the present invention, the piezoelectric beam is used as a typical structure to explain the principle of a typical control mode and the control method of the present invention, but the method is also applicable to various other structures. [0003] figure 1 It is a schematic diagram of a typical control mode adopted by many literatures. It can be seen from the figure: [0004] 1. A piezoelectric actuator 2 is attached to the lower surface of the beam 1, and a piezoelectric measuring sheet 3 of the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00G05B19/04
Inventor 姚军王晓慧叶建华金有刚李德峰谢汉兴
Owner BEIHANG UNIV
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