Heterodyne system for a position servomechanism whereby system is adaptable to a plurality of transducers
Abstract
Abstract A PHASE POSITION CONTROL SYSTEM FOR MACHINE TOOLS IS ILLUSTRATED AND DESCRIBED WHICH INCLUDES A HIGH FREQUENCY POSITION INDICATOR, A SUMMATION CIRCUIT FOR SUMMING OR HETERODYNING THE OUTPUT OF THE INDICATOR WITH A REFERENCE SIGNAL OF SLIGHTLY DIFFERENT FREQUENCY, AND A FILTER AND WAVESHAPER CIRCUIT FOR ELIMINATING ALL COMPONENTS OF THE INDICATOR OUTPUT EXCEPT THE AC FUNDAMENTAL OF THE DIFFERENCE COMPONENT ENVELOPE. A SIGNAL DERIVED FROM THE ENVELOPE IS COMPARED IN A DISCRIMINATOR WITH A COMMAND PHASE SIGNAL OF EQUAL FREQUENCY WHEREBY ANY DIFFERENCE IN PHASE PROVIDES AN OUTPUT TO DRIVE A SERVOMOTOR SO THAT A MACHINE TOOL MAY BE MOVED TO THE DESIRED POSITION. IN THIS MANNER, A SINGLE SERVOSYSTEM CAN BE MADE COMPATIBLE WITH ANY POSITION INDICATOR AVAILABLE.
Inventors
- 👤 George L Rogers
Bibliographic Details
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