Method and device for eliminating the effect of periodic disturb

Details Method and device for eliminating the effect of periodic disturb Method and device for eliminating the effect of periodic disturb

1990-07-06

1991-07-30

Ip, Paul

Electricity: motive power systems

Positional servo systems

With stabilizing features

318632, 318648, 318640, 364149, 364160, 364472, G05D 23275, G05B 1304

Patent

active

050362658

ABSTRACT:
A signal which is dependent solely on the disturbance variable is selected by means of a filter and fed to a disturbance detector. This disturbance detector simulates the steady and alternating component (sine component) of the selected signal, as well as a signal (cosine component) phase-leading by 90.degree. with the latter signal. The correction signal required to exactly compensate for the disturbance variable is determined from the sine and cosine component of the periodic disturbance signal component by means of frequency-controlled function generators and a complex phasor calculation.

REFERENCES:
patent: 4500823 (1985-02-01), Walrath
patent: 4791548 (1988-12-01), Yoshikawa et al.
patent: 4937512 (1990-06-01), Takagi

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