Frequency control in closed loop control systems

Details Frequency control in closed loop control systems Frequency control in closed loop control systems

2011-08-16

2011-08-16

Barnes-Bullock, Crystal J (Department: 2122)

Data processing: generic control systems or specific application

Generic control system, apparatus or process

Specific compensation or stabilization feature

C700S032000, C700S038000, C700S042000, C700S045000, C700S054000, C702S191000

Reexamination Certificate

active

08000817

ABSTRACT:
Process controllers, methods, and systems provide for frequency control to account for the effects of periodic disturbances in the feedback signal of closed loop control systems. The frequency components of the feedback signal are determined, including the magnitude and phase of each. Waveforms for each frequency component are generated with substantially the same magnitude and substantially the opposite phase of each frequency component. The waveforms are then summed to produce a compensating waveform that is summed within the output of the control system so that the effects of the periodic disturbances are cancelled from the control system output being provided to the system under control.

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