885 resultados para Flexible Machining
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Includes index.
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"7 February 1997."
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Supersedes his Machining and related characteristics of sourthern hardwoods, issued as Technical bulletin no. 824.
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Mode of access: Internet.
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"Service and methods demonstration."
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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"AFMDC 65-1."
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Enrollees chosen for the project were mainly from WIN (Work Incentive Program).
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At head of title: 97th Congress, 2d Session, House of Representatives, report no. 97-433.
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Includes bibliography.
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A method is proposed for determining the optimal placement and controller design for multiple distributed actuators to reduce the vibrations of flexible structures. In particular, application of piezoceramic patches to a horizontally-slewing single-link flexible manipulator modeled using the assumed modes method is investigated. The optimization method uses simulated annealing and allows placement of any number of distributed actuators of unequal length, although piezoceramics of fixed equal lengths are used in the example. It also designs an linear-quadratic-regulator controller as part of the optimization procedure. The measures of performance used in the investigation to determine optimality are the total mass of the system and the time integral of the absolute value of the hub and tip position error. This study also varies the relative weightings for each of these performance measures to observe the effects on the controller designs and piezoceramic patch positions in the optimized solutions.