Adaptive Real-Time Control for Three-Dimensional Active     Attenuation of Sound
{'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}
This project addresses the topic of three-dimensional noise control.            The majority of practical noise problems, such as machinery noise, are          three-dimensional and require research of the type undertaken in this           project.  There is a strong need for control strategies which can be            applied easily and inexpensively to such systems and be adaptive and            robust enough to operate under major variations in operating                    conditions.  This project investigates the feasibility of improved              control schemes by applying advanced control techniques to a reference          model generated by the boundary element model.  Wave propagation is             modeled using the Kirchoff Integral equation.  Finally, a control               strategy based on model reference adaptive systems is developed.  The           control scheme is tested in the acoustic chambers on several machinery          noise problems.
[{'FirstName': 'Rahmatallah', 'LastName': 'Shoureshi', 'PI_MID_INIT': 'A', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Rahmatallah A Shoureshi', 'EmailAddress': 'rshoures@du.edu', 'NSF_ID': '000106285', 'StartDate': '09/01/1985', 'EndDate': None, 'RoleCode': 'Principal Investigator'}, {'FirstName': 'Robert', 'LastName': 'Bernhard', 'PI_MID_INIT': 'J', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Robert J Bernhard', 'EmailAddress': 'bernhard@purdue.edu', 'NSF_ID': '000389238', 'StartDate': '09/01/1985', 'EndDate': None, 'RoleCode': 'Co-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}
{'Name': None, 'CityName': None, 'StateCode': None, 'ZipCode': None, 'StreetAddress': None, 'CountryCode': None, 'CountryName': None, 'StateName': None, 'CountryFlag': None, 'CONGRESSDISTRICT': None, 'CONGRESS_DISTRICT_PERF': '""'}
[{'Code': '1444', 'Text': 'SURFACE ENGINEERING'}, {'Code': '1445', 'Text': 'DYNAMICS & CONTROL'}]
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1985&All=true', 'xml': '8505834.xml'}