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http://hdl.handle.net/2142/23524 eng Tsao, Tsu-Chin Hanson, Reed David 2011-05-07T14:17:24Z 2011-05-07T14:17:24Z 10000-01-01 1996 Variable depth of cut machining (VDCM) refers to machining systems that have the ability to vary the depth of cut rapidly by utilizing fast-tool servos. In recent years, researchers have investigated the development of VDCM for several industrial applications. These include both the turning of non-circular workpieces and the compensation of process-generated dynamic errors. Deficiencies in existing VDCM systems include insufficient speed, accuracy, and servo stiffness. The goal of the proposed research is to advance VDCM to industrial applicability. Specifically, the research objectives are: (1) to develop an industrial grade VDCM system capable of compensating for cylindricity errors in machined bores caused by workpiece flexibility; and (2) to investigate methods to control a VDCM system while operating under programmed variations in the spindle speed. The contributions of this research include: (1) Design, analysis and control of a fast tool servo capable of operating at industrial cutting conditions. (2) Formulation and experimental demonstration of a process cycle feedback learning control system used for the compensation of cutting force induced cylindricity errors in machined bores. (3) Formulation of analysis and design techniques of repetitive controllers for linear periodic time varying systems. (4) Application of periodic repetitive control to a VDCM system operating under programmed variation of the spindle speed for the purpose of increasing the cutting stability margin. Made available in DSpace on 2011-05-07T14:17:24Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9712298.pdf: 4316523 bytes, checksum: 0d3a711bf9d538827394ecb71d6bce18 (MD5) Previous issue date: 1996 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:05:03Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:31:08-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only 9780591198881 AAI9712298 (UMI)AAI9712298 Copyright 1996 Hanson, Reed David Engineering, Mechanical Variable depth of cut machining for dynamic error compensation text Engineering, Mechanical Engineering, Mechanical University of Illinois at Urbana-Champaign Dissertation Ph.D.