Universal modularized digital controller
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsDonald W. Doherty, Elbert J. Wells, Jr.
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Abstract
A modularized digital controller which serves as a means of achieving dync compensation and also acts as an interfacing device in a closed-loop digital servo-control configuration. The controller incorporates four functional modules, the first of which is designed for the particular type of system being controlled and the remaining three being identical for all systems. A nonlinear or course control mode is employed during the period of synchronization to large input commands from a master source and, after the system dynamic error has been reduced to a nominal size, a linear control algorithm is used.
Claims7
A multiaxis power drive controller for a plant comprising:
- interface means for receiving a digital plant position order from a master source, for receiving plant position feedback signals and for storing a plurality of predetermined constants;
- arithmetic means connected to said interface means for performing addition, subtraction and multiplication operations and for outputting a digital velocity signal;
- temporary storage means connected to said interface means and to said arithmetic means for storing the results of said operations of said arithmetic unit and for receiving digital information from said interface means;
- mode select means connected to said temporary storage means for initiating the comparison of the error value E(n), where E(n) is the difference between said plant position order and said plant position feedback signal, with first and second predetermined conditions and for selecting first and second modes of operation in accordance with said comparison;
- digital to analog conversion means connected to said arithmetic means for providing an analog velocity order to said power drive;
- and
- timing and control means for outputting timing signals to said interface means, said arithmetic means, said temporary storage means, said mode select means and to said digital to analog conversion means.
Dependencies are inferred from the claim text.