The Study of the Active Control Based on Strucural Intensity and the Design of Its Error Sensors
|Course||Power Machinery and Engineering|
|Keywords||Structure-borne sound Active Control Infinite beam Inhomogeneous boundary beam Objective function Acceleration sensor PVDF sensor|
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 .