Dissertation > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor

The Study of the Active Control Based on Strucural Intensity and the Design of Its Error Sensors

Author ZhuZhiWei
Tutor JiangZhe
School Jiangsu University
Course Power Machinery and Engineering
Keywords Structure-borne sound Active Control Infinite beam Inhomogeneous boundary beam Objective function Acceleration sensor PVDF sensor
Type Master's thesis
Year 2003
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Structure-borne sound technology is an effective means to solve noise and vibration problems in recent years . The structural defects and identify the noise source as a diagnostic tool , it can determine the size of the structural vibration , to determine the structure of the main route of transmission of vibration . Based on the direct relationship between the structure sound intensity and vibration , active vibration control of structural intensity as the objective function has been developed in the late 1980s . The elasticity based , sound intensity of the beam structure formula is derived . Structural intensity as the objective function , active control study gives a different error sensor position infinitely long beam and non- homogeneous boundary beam , the different positional relationship between the primary power and control of the active control effect . At the same time , this paper also discusses the effect of structure sound intensity and displacement control of the objective function , the former is a better conclusion . In this paper, the conditions to the structure sound intensity as the objective function , a direct relationship between the control and the primary force is given control strategy . Error sensor is one of the key components in the active control system , it measured signal accurate or not have a great impact on the entire control effect . For previously active control study with finite difference error and additional vibration acceleration sensor to measure sound intensity structure these deficiencies , this paper proposes a new error sensor -PVDF sensor , use it to measure sound intensity structure does not produce a finite difference error and additional vibration . In comparing both sound intensity sensor measurement structure results , concluded : PVDF sensor to measure sound intensity structure is feasible .

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