Digitally implemented ripple detector
AssigneeHamilton Sundstrand Corporation
InventorALBERT MARIUS WOROU
Life of this patent
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Abstract
What is described is a system for estimating a ripple component of an input signal. The system includes a first module configured to remove a direct current (DC) component from the input signal and output an alternating current (AC) signal that includes the ripple component and a low frequency component of the input signal. The system also includes a second module configured to determine a period and an amplitude of the AC signal and output an estimated ripple signal based on the period and the amplitude of the AC signal.
Claims15
A system for estimating a ripple component of an input signal, the system comprising:
- a first module configured to remove a direct current (DC) component from the input signal and output an alternating current (AC) signal that includes the ripple component and a low frequency component of the input signal;
- and
- a second module configured to determine a period and an amplitude of the AC signal and output an estimated ripple signal based on the period and the amplitude of the AC signal.
A system for estimating a ripple component of an analog input signal, the system comprising:
- a first module configured to convert the analog input signal to a digital input signal, the analog input signal comprising the ripple component, a direct current (DC) component and a low frequency component;
- a second module configured to remove the DC component from the digital input signal and output an alternating current (AC) signal including the ripple component and the low frequency component;
- a third module configured to determine locations at which the AC signal has a zero-value, a maximum value of the AC signal and a minimum value of the AC signal;
- and
- a fourth module configured to determine an estimated ripple signal based on the locations at which the AC signal has zero-crossings, the maximum value of the AC signal and the minimum value of the AC signal.
Dependencies are inferred from the claim text.