Active cancellation of a pulsating flow with a flow signal noise reference

A method for active cancellation of a pulsating flow with a flow signal noise reference, the method comprising:

• receiving a flow signal from a flow sensor, the flow sensor being configured to measure a flow rate of the pulsating flow;
• generating a flow rate signal from the flow signal;
• generating a noise reference signal from the flow signal;
• generating a cancelling signal from the noise reference signal;
• determining a flow rate control signal for controlling the flow rate of the fluid;
• receiving the flow rate control signal;
• generating a valve signal based on the flow rate control signal and the cancelling signal;
• and
• providing the valve signal to a valve to control the flow rate and attenuate one or more pulses of the pulsating flow of the fluid;
• wherein generating the noise reference signal from the flow signal comprises:
• receiving a first feedback error from the noise reference signal;
• determining coefficients using the first feedback error;
• and
• generating an estimate of a DC component in the flow signal using the coefficients.

A system for active cancellation of a pulsating flow with a flow signal noise reference, the system comprising:

• a fluid control system comprising:
• a valve;
• and
• a flow sensor fluidly coupled to the valve, the flow sensor being configured to measure a flow rate of the pulsating flow;
• and
• an electronics communicatively coupled to the valve and the flow sensor, the electronics configured to:
• receive a flow signal from a flow sensor;
• generate a flow rate signal from the flow signal;
• generate a noise reference signal from the flow signal;
• generate a cancelling signal from the noise reference signal;
• determine a flow rate control signal for controlling the flow rate of the fluid;
• generate a valve signal based on the flow rate control signal and the cancelling signal;
• and
• provide the valve signal to a valve to control the flow rate and attenuate one or more pulses of the pulsating flow of the fluid;
• wherein the electronics being configured to generate the noise reference signal from the flow signal comprises the electronics being configured to:
• receive a first feedback error from the noise reference signal;
• determine coefficients using the first feedback error;
• and
• generate an estimate of a DC component in the flow signal using the coefficients.