Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Patent
1975-12-09
1978-06-13
Schaefer, Robert K.
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
318654, 318661, G05B 1930
Patent
active
040951596
ABSTRACT:
This invention relates to an electronic apparatus for automatic positioning and distance measurement of mobile members. The apparatus according to the invention comprises a rotary electromagnetic transducer with two pairs of windings, in which the primary circuits receive electrical voltages representative of the controlled angular distance values and the secondary circuits deliver accordingly an electrical response voltage, whose shape and amplitude depend on the difference between said controlled distance and the mechanical angle between rotar and stator portions containing said secondary and, respectively, primary circuits. The electrical voltages representative of the controlled angular distance values are generated by electronic circuits comprising a first binary counter which translates the controlled distance into binary code, a second binary counter which generates a binary ramp, two adders, a combining network, four sequential networks and two analogue amplification and sign circuits. The electrical response voltage is in turn filtered and demodulated to represent a distance error signal which, in case of positioning, drives the positioning linkage block and, in case of distance measurement, compels the first binary counter to operate in such a manner that the distance represented therein tends towards the value of the relative angle between the rotar and stator portions of the electromagnetic transducer.
REFERENCES:
patent: 3624642 (1971-11-01), Tripp
patent: 3671728 (1972-06-01), Day et al.
patent: 3686487 (1972-08-01), Tripp
patent: 3855514 (1974-12-01), Zwitter et al.
patent: 3860920 (1975-01-01), Tripp
patent: 3870938 (1975-03-01), Tooze et al.
Exo Elettronica Industriale S.r.l.
Feldhaus John J.
Schaefer Robert K.
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