Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1974-04-08
1976-02-03
Schaefer, Robert K.
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
264 40, 425162, 425141, G05B 1924
Patent
active
039367134
ABSTRACT:
A circuit for analog adjustment of a machine including a programming means to generate a fixed number of discrete control voltages. Each programmed control voltage corresponds to the desired machine control voltage at a particular moment of time in the cycle of the controlled machine. A staircase voltage is generated during the time period between two successive moments in the machine cycle, i.e., a machine cycle interval at which the control voltage is defined. The staircase voltage starts during each machine interval at the programmed control voltage corresponding to one moment of time in the machine cycle at the beginning of a particular machine cycle interval and ending, at the beginning of the next machine cycle interval, at the programmed control voltage for the moment of time corresponding to the beginning of the next machine cycle interval. The staircase voltage has a maximum step amplitude change that is small compared to the voltage difference between successive programmed control voltages so as to prevent undesirable step changes in the machine control voltage.
REFERENCES:
patent: 2784452 (1957-03-01), Ruekberg et al.
patent: 2994812 (1961-08-01), Spencer et al.
patent: 3019481 (1962-02-01), Negoro
patent: 3040221 (1962-06-01), Fitzner
patent: 3368241 (1968-02-01), Williams
patent: 3712772 (1973-01-01), Hunker
patent: 3764786 (1973-10-01), Vanter et al.
patent: 3790875 (1974-02-01), Claxton
Feldhaus John J.
Hunkar Laboratories, Inc.
Schaefer Robert K.
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