Electricity: motive power systems – Positional servo systems – 'reset' systems
Patent
1990-12-20
1992-06-23
Ip, Paul
Electricity: motive power systems
Positional servo systems
'reset' systems
318609, 364161, 364162, 364163, G05B 1142
Patent
active
051246260
ABSTRACT:
In a feedback control system, a reference input element adjusts the amplitude and phase of a sinusoidal component of a command signal applied to the control system to cancel the transfer effects of the feedback loop, substantially eliminating error between a feedback signal and the common signal. The reference input element processes the sinusoidal component of a command signal through a network metaphor of a trigonometric identity. Adjustment of weights of the trigonometric identity permits arbitrary adjustment of the amplitude and phase of the command signal. A comparison of the command signal and the feedback signal, or of analogous signals, is used as an input to an automated trigonometric identity weight adjustment routine in the reference input element.
REFERENCES:
patent: 4390942 (1983-06-01), de Keizer
patent: 4549123 (1985-10-01), Hagglund et al.
patent: 5059880 (1991-10-01), Hiroi
Widrow and Stearns, Adaptive Signal Processing, Prentice-Hall, 1985, Chapter 6.
Gold and Raderm, Digital Signal Processing of Signals, McGraw-Hill, 1969, pp. 90-92.
Bellanger, Digital Processing of Signals, Wiley, 1984, pp. 251-252.
Ip Paul
MTS Systems Corporation
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