Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1976-06-24
1977-04-19
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307295, 332 23A, 332 48, 328132, 328 61, 329 50, H03D 318, H03K 116
Patent
active
040191451
ABSTRACT:
Rate of change of the angle .theta. conveyed by a three-wire synchro signal is developed as an inherently normalized signal (d.theta./dt) by dividing N sin .theta. (d.theta./dt) signals by N sin .theta. signals and N cos .theta. (d.theta./dt) signals by N cos .theta. signals over selected ones of contiguous segments of a full 360.degree. range of .theta. where the divisor signals do not go through zero. The N sin .theta. and N cos .theta. signals are normalized outputs of dividers which divide synchro carrier reference demodulated sin .theta. and cos .theta. signals by a synchro carrier reference level signal. N sin .theta. and N cos .theta. signals are differentiated to derive the N sin (d.theta./dt) and N cos .theta. (d.theta./dt) signals. Logic circuitry switches appropriately signed ones of the signals as divisor and dividend inputs to an output divider whose output is (d.theta./dt) and is independent of synchro carrier level, synchro transformation ratios, phase shift between the synchro X-Y-Z voltages and the synchro carrier reference, and synchro carrier reference waveform distortion.
REFERENCES:
patent: 3265904 (1966-08-01), Spencer
patent: 3495078 (1970-02-01), James et al.
patent: 3501651 (1970-03-01), Cottrell
patent: 3514719 (1970-05-01), Rhodes
patent: 3600694 (1971-08-01), McCollum
patent: 3629711 (1971-12-01), Strole
patent: 3639850 (1972-02-01), Brooks
Anderson Richard W.
Crawford Robert J.
Heyman John S.
Rockwell International Corporation
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