By George W. Younkin
Written through a professional specialist, this authoritative and informative consultant provides the applied sciences within the calculation of brushless DC motor time constants, fabric on force sizing, and case reviews illustrating key issues. the writer info requirements relating to the operation of laptop carrier drives and descriptions troubleshooting equipment for difficulties pertaining to computing device nonlinearities, inertia, force stiffness, and friction. He highlights lately constructed simulation equipment used to foretell, verify, and enhance the functionality of carrier platforms and their elements and covers the functionality and meeting of force platforms, force resolutions, force ratios, and accountability cycles
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Extra resources for Industrial servo control systems : fundamentals and applications
All Rights Reserved The machine axis prior to adding frequency selective feedback, is assumed to have a position transducer on the machine slide. To add frequency selective feedback, an instrument gearbox must be added to the rear of the servo motor. A position transducer such as a resolver will be geared to the motor shaft with a ratio determined by the resolution of the machine slide feedback transducer. 5 FEEDFORWARD CONTROL The problem of developing an industrial servo drive with high-performance capabilities for accurate positioning is a subject of much importance.
The error is also a function of yc . 5 Hz. This is required to eliminate the machine structural dynamics from the machine slide feedback position ðys Þ and is the key to the frequency selective feedback control function. 4-3) The correction yc is added to the main-feed servo drive by means of resolver (5). The correction yc causes the feed servo drive to move by the amount of the correction. Therefore both ym (at the motor) and ys (at the machine slide) move by the amount of the correction yc .
Fig. 20 Zero-error feedforward block diagram. Copyright 2003 by Marcel Dekker, Inc. All Rights Reserved Fig. 21 Complete feedforward block diagram. Because the inverse of a type 1 system differentiates rather than integrates the compensating path is simply a velocity signal rather than a position signal. Consider the ﬁnal design of the system described in Figure 22. From Figure 22 oiðsÞ Kv yoðsÞ ¼ yiðsÞ À yoðsÞ þ Kv sFðsÞ oiðsÞ Kv Kv yoðsÞ 1 þ ¼ yiðsÞ þ sFðsÞ Kv sFðsÞ yoðsÞ ¼ Fig. 22 ðKv yiðsÞ þ oiðsÞ Þ ðsFðsÞ þ Kv Þ Zero-error position servo.
Industrial servo control systems : fundamentals and applications by George W. Younkin