Research Initiation:  A Study of the Optimal Number of      Location of Control Forces for Active Vibration Control of  Contained Acoustic Fields
{'Code': '07030000', 'Directorate': {'Abbreviation': 'ENG', 'LongName': 'Directorate For Engineering'}, 'Division': {'Abbreviation': 'CMMI', 'LongName': 'Div Of Civil, Mechanical, & Manufact Inn'}}
{'SignBlockName': 'Elbert L. Marsh', 'PO_EMAI': None, 'PO_PHON': None}
Noise control for enclosed spaces continues to be a very important              topic.  Traditional passive techniques are often not feasible because           of the inherent excessive weight penalty associated with the method.            This is particularly true for aircraft or spacecraft environments.              Recently, active control methods have received more attention and               early results are promising.  This project extends this active                  control thrust.  It investigates the fundamental problem of                     controlling the noise within a cylindrical shell by applying control            forces to the shell wall in order to reduce particular vibration                modes associated with transmitting acoustical energy into the                   enclosed cavity.
{'FirstName': 'James', 'LastName': 'Jones', 'PI_MID_INIT': 'D', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'James D Jones', 'EmailAddress': 'jonesjd@ecn.purdue.edu', 'NSF_ID': '000348158', 'StartDate': '09/01/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Purdue University', 'CityName': 'WEST LAFAYETTE', 'ZipCode': '479061332', 'PhoneNumber': '7654941055', 'StreetAddress': '2550 NORTHWESTERN AVE # 1100', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Indiana', 'StateCode': 'IN', 'CONGRESSDISTRICT': '04', 'CONGRESS_DISTRICT_ORG': 'IN04', 'ORG_UEI_NUM': 'YRXVL4JYCEF5', 'ORG_LGL_BUS_NAME': 'PURDUE UNIVERSITY', 'ORG_PRNT_UEI_NUM': None}
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{'Code': '1445', 'Text': 'DYNAMICS & CONTROL'}
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