The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
M. Zaidi - One of the best experts on this subject based on the ideXlab platform.
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comparative vacuum monitoring cvm as an alternate Means of Compliance amoc
Insight, 2005Co-Authors: G. Wheatley, J. Kollgaard, J. Register, M. ZaidiAbstract:Many aircraft inspections currently require personnel to access difficult or hazardous areas. The inspections also require removal of structure, sealant often must be removed and restored with the commensurate damage to structure, ventilation must take place, etc. An automated inspection method that does not have reduced accuracy and that could take place with personnel remote to the inspection area is desirable. permanently mounted sensors in the inspection areas that could be remotely interrogated would be the simplest option. A CVM portable system is currently available for this purpose. Boeing, FAA, Airbus, Northwest Airlines, US Navy and RAAF are currently conducting independent verification trials with Structural Monitoring Systems Ltd (SMS). These trials involve laboratory, environmental and on-aircraft tests. The validation trial with the US Navy has involved an on-aircraft installation for the last 18 months and recently, successfully detected a crack. SMS is now conducting a joint Boeing/Northwest Airlines/FAA validation trial on a flying DC-9. The wing spar in the fuel tank area of the wing is to be monitored. The current inspection requires four days for completion and will be reduced to five minutes by CVM. The system has been installed and should result in CVM being approved as an alternate Means of Compliance (AMOC).
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Comparative vacuum monitoring (CVM???) as an alternate Means of Compliance (AMOC)
Insight: Non-Destructive Testing and Condition Monitoring, 2005Co-Authors: G. Wheatley, J. Kollgaard, J. Register, M. ZaidiAbstract:Many aircraft inspections currently necessitate personnel to access difficult or hazardous areas. The inspections also require removal of structures, sealants often must be removed and restored with commensurate damage to structures, ventilation must take place, and so forth. An automated inspection method that does not have reduced accuracy and that could take place with personnel remote to the inspection area is desirable. Permanently mounted sensors in the inspection areas that could be remotely interrogated would be the simplest option. A CVM (comparative vacuum monitoring) portable system is currently available for this purpose. Boeing, the FAA, Airbus, Northwest Airlines, the U.S. Navy and the RAAF are currently conducting independent verification trials with Structural Monitoring Systems, Ltd. (SMS). These trials involve laboratory, environmental and on-aircraft tests. The validation trial with the U.S. Navy has involved an on-aircraft installation for the last 18 months and recently successfully detected a crack. SMS is now conducting a joint Boeing/Northwest Airlines/FAA validation trial on a flying DC-9. The wing spar in the fuel tank area of the wing is to be monitored. The current inspection requires four days for completion and will be reduced to five minutes by CVM. Installation is expected to occur in the last quarter of 2003 and will result in CVM being approved as an alternate Means of Compliance.
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comparative vacuum monitoring as an alternate Means of Compliance
2003Co-Authors: G. Wheatley, J. Register, G Kollgaard, M. ZaidiAbstract:Many aircraft inspections currently required necessitate personnel to access·difficult or hazardous areas. The inspections also require removal of structure,,sealant often must be removed and restored with the commensurate damage to structure, ventilation must take place, etc. An automated inspection method that does not have reduced accuracy and that could take place with personnel remote to the inspection area is desirable. Permanently mounted sensors in the inspection·areas that could be remotely interrogated would be the simplest option. A CVM portable system is currently available for this purpose. Boeing1, FAA 1, Airbus2, Northwest Airlines1, US Navy3 and RAAF4 are currently conducting independent verification trials with Structural Monitoring Systems, Ltd. (SMS). These trials involve laboratory, environmental and on-aircraft tests. The validation trial with theUS Navy has involved an on-aircraft installation for the last 18 months and recently successfully detected a crack. SMS is now conducting a joint Boeing/Northwest Airlines/FAA validation trial on a flying DC-9. The wing spar in the fuel tank area of the wing is to be monitored. The current inspection requires 4 days for completion and will be reduced to 5 minutes by CVM. Installation is expected to occur in the last quarter of 2003 and will result in CVM being approved as an alternate Means of Compliance (AMOC).
Nicola Pio Belfiore - One of the best experts on this subject based on the ideXlab platform.
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Stiffness Characterization of Biological Tissues by Means of MEMS-Technology Based Micro Grippers Under Position Control
Advances in Service and Industrial Robotics, 2018Co-Authors: Alvise Bagolini, Pierluigi Bellutti, Vito D’andrea, Paolo Di Giamberardino, Matteo Verotti, Alden Dochshanov, Imre J Rudas, Nicola Pio BelfioreAbstract:This paper presents a method for detecting the mechanical stiffness of micro-metric biological tissues by Means of Compliance tests performed with a MEMS-Technology based microgripper. Thanks to an actuating rotary comb drive working in cooperation with another sensing rotary comb drive, the system is able to recognize the tissue sample stiffness. Such characterization is possible thanks to a proper control system that is applied to the whole mechanical structure.
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RAAD - Stiffness Characterization of Biological Tissues by Means of MEMS-Technology Based Micro Grippers Under Position Control
Advances in Service and Industrial Robotics, 2017Co-Authors: Alvise Bagolini, Pierluigi Bellutti, Paolo Di Giamberardino, Matteo Verotti, Alden Dochshanov, Imre J Rudas, Vito D'andrea, Nicola Pio BelfioreAbstract:This paper presents a method for detecting the mechanical stiffness of micro-metric biological tissues by Means of Compliance tests performed with a MEMS-Technology based microgripper. Thanks to an actuating rotary comb drive working in cooperation with another sensing rotary comb drive, the system is able to recognize the tissue sample stiffness. Such characterization is possible thanks to a proper control system that is applied to the whole mechanical structure.
Michael K Zyskowski - One of the best experts on this subject based on the ideXlab platform.
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alternative Means of Compliance for composite structural fatigue certification of small general aviation aircraft
Transportation Research Record, 1997Co-Authors: Michael K ZyskowskiAbstract:As the future of the general aviation industry seems to be improving, a cultural paradigm shift may be imminent with the development of an advanced, revolutionary transportation system within the United States. One significant problem with this idea has been shown to be the fatigue structural certification of small, composite airplanes. By implementing a fatigue safe-life certification method for small general aviation aircraft, reduced certification program costs may be obtained while maintaining their reliability and capability. Although acceptable only when certifying aluminum aircraft, the current method has been modified here to incorporate the use of discontinuous composite materials on a defined small general aviation aircraft. Through this modification, a simplified method for the determination of the stress-cycle curve and a new "scatter factor" methodology based on the composite material properties have been developed. By using fiberglass reinforced polyester as an example composite material fam...
G. Wheatley - One of the best experts on this subject based on the ideXlab platform.
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comparative vacuum monitoring cvm as an alternate Means of Compliance amoc
Insight, 2005Co-Authors: G. Wheatley, J. Kollgaard, J. Register, M. ZaidiAbstract:Many aircraft inspections currently require personnel to access difficult or hazardous areas. The inspections also require removal of structure, sealant often must be removed and restored with the commensurate damage to structure, ventilation must take place, etc. An automated inspection method that does not have reduced accuracy and that could take place with personnel remote to the inspection area is desirable. permanently mounted sensors in the inspection areas that could be remotely interrogated would be the simplest option. A CVM portable system is currently available for this purpose. Boeing, FAA, Airbus, Northwest Airlines, US Navy and RAAF are currently conducting independent verification trials with Structural Monitoring Systems Ltd (SMS). These trials involve laboratory, environmental and on-aircraft tests. The validation trial with the US Navy has involved an on-aircraft installation for the last 18 months and recently, successfully detected a crack. SMS is now conducting a joint Boeing/Northwest Airlines/FAA validation trial on a flying DC-9. The wing spar in the fuel tank area of the wing is to be monitored. The current inspection requires four days for completion and will be reduced to five minutes by CVM. The system has been installed and should result in CVM being approved as an alternate Means of Compliance (AMOC).
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Comparative vacuum monitoring (CVM???) as an alternate Means of Compliance (AMOC)
Insight: Non-Destructive Testing and Condition Monitoring, 2005Co-Authors: G. Wheatley, J. Kollgaard, J. Register, M. ZaidiAbstract:Many aircraft inspections currently necessitate personnel to access difficult or hazardous areas. The inspections also require removal of structures, sealants often must be removed and restored with commensurate damage to structures, ventilation must take place, and so forth. An automated inspection method that does not have reduced accuracy and that could take place with personnel remote to the inspection area is desirable. Permanently mounted sensors in the inspection areas that could be remotely interrogated would be the simplest option. A CVM (comparative vacuum monitoring) portable system is currently available for this purpose. Boeing, the FAA, Airbus, Northwest Airlines, the U.S. Navy and the RAAF are currently conducting independent verification trials with Structural Monitoring Systems, Ltd. (SMS). These trials involve laboratory, environmental and on-aircraft tests. The validation trial with the U.S. Navy has involved an on-aircraft installation for the last 18 months and recently successfully detected a crack. SMS is now conducting a joint Boeing/Northwest Airlines/FAA validation trial on a flying DC-9. The wing spar in the fuel tank area of the wing is to be monitored. The current inspection requires four days for completion and will be reduced to five minutes by CVM. Installation is expected to occur in the last quarter of 2003 and will result in CVM being approved as an alternate Means of Compliance.
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comparative vacuum monitoring as an alternate Means of Compliance
2003Co-Authors: G. Wheatley, J. Register, G Kollgaard, M. ZaidiAbstract:Many aircraft inspections currently required necessitate personnel to access·difficult or hazardous areas. The inspections also require removal of structure,,sealant often must be removed and restored with the commensurate damage to structure, ventilation must take place, etc. An automated inspection method that does not have reduced accuracy and that could take place with personnel remote to the inspection area is desirable. Permanently mounted sensors in the inspection·areas that could be remotely interrogated would be the simplest option. A CVM portable system is currently available for this purpose. Boeing1, FAA 1, Airbus2, Northwest Airlines1, US Navy3 and RAAF4 are currently conducting independent verification trials with Structural Monitoring Systems, Ltd. (SMS). These trials involve laboratory, environmental and on-aircraft tests. The validation trial with theUS Navy has involved an on-aircraft installation for the last 18 months and recently successfully detected a crack. SMS is now conducting a joint Boeing/Northwest Airlines/FAA validation trial on a flying DC-9. The wing spar in the fuel tank area of the wing is to be monitored. The current inspection requires 4 days for completion and will be reduced to 5 minutes by CVM. Installation is expected to occur in the last quarter of 2003 and will result in CVM being approved as an alternate Means of Compliance (AMOC).
D. Fersini - One of the best experts on this subject based on the ideXlab platform.
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Fracture and fatigue crack growth behaviour of PMMC friction stir welded butt joints
Engineering Fracture Mechanics, 2008Co-Authors: Alessandro Pirondi, Luca Collini, D. FersiniAbstract:Abstract The paper is focused on the evaluation of the fracture and Fatigue Crack Growth (FCG) properties of butt joints of particulate metal–matrix composite (PMMC) obtained by friction stir welding (FSW). The materials considered are two aluminum alloy matrix/alumina particle PMMCs (AA6061/Al 2 O 3 /20p and AA7005/Al 2 O 3 /10p). Tests were conducted on unwelded and welded PMMCs using CT and Extended CT (ECT) specimen geometries, respectively. The crack growth rate was monitored by Means of Compliance with a strain gage attached on the back of the specimen. FCG experiments were carried out both at the centre and in the Thermo-Mechanically Altered Zone (TMAZ) at the side of the weld. The comparison between unwelded and welded PMMCs showed that FSW influences fracture toughness and FCG rate in a different fashion depending on the material. In particular, the FSW AA6061/Al 2 O 3 /20p butt joint exhibited comparable fracture toughness and higher FCG threshold with respect to the unwelded material, while in the case of AA7005/Al 2 O 3 /10p the behaviour is the opposite. The interpretation of this trend has been carried out by optical analysis of the crack path roughness and its correlation with the FCG rate. The dynamic recrystallization of the aluminum matrix and particle shaping operated by the FSW tool are at the ground of the explanation.
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Fracture and fatigue crack growth behaviour of PMMC friction stir welded butt joints
Engineering Fracture Mechanics, 2008Co-Authors: Alessandro Pirondi, Luca Collini, D. FersiniAbstract:The paper is focused on the evaluation of the fracture and Fatigue Crack Growth (FCG) properties of butt joints of particulate metal-matrix composite (PMMC) obtained by friction stir welding (FSW). The materials considered are two aluminum alloy matrix/alumina particle PMMCs (AA6061/Al2O3/20p and AA7005/Al2O3/10p). Tests were conducted on unwelded and welded PMMCs using CT and Extended CT (ECT) specimen geometries, respectively. The crack growth rate was monitored by Means of Compliance with a strain gage attached on the back of the specimen. FCG experiments were carried out both at the centre and in the Thermo-Mechanically Altered Zone (TMAZ) at the side of the weld. The comparison between unwelded and welded PMMCs showed that FSW influences fracture toughness and FCG rate in a different fashion depending on the material. In particular, the FSW AA6061/Al2O3/20p butt joint exhibited comparable fracture toughness and higher FCG threshold with respect to the unwelded material, while in the case of AA7005/Al2O3/10p the behaviour is the opposite. The interpretation of this trend has been carried out by optical analysis of the crack path roughness and its correlation with the FCG rate. The dynamic recrystallization of the aluminum matrix and particle shaping operated by the FSW tool are at the ground of the explanation. © 2008 Elsevier Ltd. All rights reserved.
