Fast adapting control system and method

Claim 2

An adaptive controller comprising: an IIR adaptive filter model with an error input that depends on a model error signal which is a combination of an error signal from an error sensor, a filtered correction signal which is generated by filtering a correction signal used to create a secondary input that combines with a system input to yield a system output, and a model output signal from the adaptive IIR filter model.

Claim 3

In an adaptive control system having an output transducer that receives a correction signal from an adaptive controller and outputs a control signal that combines with a system input to yield a system output, and an error sensor that senses the system output and outputs an error signal to the adaptive controller, an improvement in the adaptive controller comprising: a correction signal filter that receives the correction signal and outputs a filtered correction signal; an uncancelled equation error summer that receives the error signal and the filtered correction signal and outputs an uncancelled equation error signal; a reference signal filter that receives a reference signal and outputs a filtered reference signal; an adaptive filter model that receives the filtered reference signal and outputs a model output signal; a model error summer that receives the uncancelled equation error signal and the model output signal, and outputs a model error signal that is used to adapt the adaptive filter model; a copy of the adaptive filter model that receives the reference signal and outputs the correction signal; an input sensor that senses the system input and outputs an input signal to the adaptive controller; an adaptive D filter model that receives the correction signal and outputs a D model output signal; and a reference signal summer that receives the input signal from the input sensor and the D model output signal and outputs the reference signal.

Claim 4

In an adaptive control system having an output transducer that receives a correction signal from an adaptive controller and outputs a control signal that combines with a system input to yield a system output, and an error sensor that senses the system output and outputs an error signal to the adaptive controller, an improvement in the adaptive controller comprising: a correction signal filter that receives the correction signal and outputs a filtered correction signal; an uncancelled equation error summer that receives the error signal and the filtered correction signal and outputs an uncancelled equation error signal; a reference signal filter that receives a reference signal and outputs a filtered reference signal; an adaptive filter model that receives the filtered reference signal and outputs a model output signal; a model error summer that receives the uncancelled equation error signal and the model output signal, and outputs a model error signal that is used to adapt the adaptive filter model; a copy of the adaptive filter model that receives the reference signal and outputs the correction signal; an input sensor that senses the system input and outputs an input signal to the adaptive controller; an adaptive D filter model that receives the correction signal and outputs a D model output signal; and a reference signal summer that receives the input signal from the input sensor and the D model output signal and outputs the reference signal.

Claim 5

In an adaptive control system having an output transducer that receives a correction signal from an adaptive controller and outputs a control signal that combines with a system input to yield a system output, and an error sensor that senses the system output and outputs an error signal to the adaptive controller, an improvement in the adaptive controller comprising: a correction signal filter that receives the correction signal and outputs a filtered correction signal; an uncancelled equation error summer that receives the error signal and the filtered correction signal and outputs an uncancelled equation error signal; a reference signal filter that receives a reference signal and outputs a filtered reference signal; an adaptive filter model that receives the filtered reference signal and outputs a model output signal; a model error summer that receives the uncancelled equation error signal and the model output signal, and outputs a model error signal that is used to adapt the adaptive filter model; and a copy of the adaptive filter model that receives the reference signal and outputs the correction signal; wherein the uncancelled equation error signal is also used as the reference signal.

Claim 6

In an adaptive control system having an output transducer that receives a correction signal from an adaptive controller and outputs a control signal that combines with a system input to yield a system output, and an error sensor that senses the system output and outputs an error signal to the adaptive controller, an improvement in the adaptive controller comprising: a correction signal filter that receives the correction signal and outputs a filtered correction signal; an uncancelled equation error summer that receives the error signal and the filtered correction signal and outputs an uncancelled equation error signal; a reference signal filter that receives a reference signal and outputs a filtered reference signal; an adaptive filter model that receives the filtered reference signal and outputs a model output signal; a model error summer that receives the uncancelled equation error signal and the model output signal, and outputs a model error signal that is used to adapt the adaptive filter model; and a copy of the adaptive filter model that receives the reference signal and outputs the correction signal; wherein the uncancelled equation error signal is also used as the reference signal.

Claim 7

In an adaptive control system having an output transducer that receives a correction signal from an adaptive controller and outputs a control signal that combines with a system input to yield a system output, and an error sensor that senses the system output and outputs an error signal to the adaptive controller, an improvement in the adaptive controller comprising: a correction signal filter that receives the correction signal and outputs a filtered correction signal; an uncancelled equation error summer that receives the error signal and the filtered correction signal and outputs an uncancelled equation error signal; a reference signal filter that receives a reference signal and outputs a filtered reference signal; an adaptive filter model that receives the filtered reference signal and outputs a model output signal; a model error summer that receives the uncancelled equation error signal and the model output signal, and outputs a model error signal that is used to adapt the adaptive filter model; and a copy of the adaptive filter model that receives the reference signal and outputs the correction signal; wherein the adaptive filter model is an IIR filter.

Claim 8

In an adaptive control system having an output transducer that receives a correction signal from an adaptive controller and outputs a control signal that combines with a system input to yield a system output, and an error sensor that senses the system output and outputs an error signal to the adaptive controller, an improvement in the adaptive controller comprising: a correction signal filter that receives the correction signal and outputs a filtered correction signal; an uncancelled equation error summer that receives the error signal and the filtered correction signal and outputs an uncancelled equation error signal; a reference signal filter that receives a reference signal and outputs a filtered reference signal; an adaptive filter model that receives the filtered reference signal and outputs a model output signal; a model error summer that receives the uncancelled equation error signal and the model output signal, and outputs a model error signal that is used to adapt the adaptive filter model; and a copy of the adaptive filter model that receives the reference signal and outputs the correction signal; wherein the adaptive filter model is an IIR filter.

Claim 9

An adaptive control system having a system input and a system output, the system comprising: a plurality of n output transducers each receiving one of n correction signals and outputting a secondary input that combines with the system input to yield the system output; a correction signal filter having p×n channels, the correction signal filter receiving n correction signals and outputting p filtered correction signals; a plurality of p error sensors, each error sensor sensing the system output and outputting an error signal; a plurality of p uncancelled equation error summers, each uncancelled equation error summer receiving one of the p error signals and one of the p filter correction signals and outputting an uncancelled equation error signal; an adaptive filter model having p adaptive elements corresponding to each of n×m filter model channels, each of the p×n×m adaptive elements outputting an element output signal; a reference signal filter corresponding to each adaptive filter model element, each reference signal filter receiving one of m reference signals and outputting a filtered reference signal to the corresponding adaptive filter model element; a plurality of p model output summers, each summing n×m element output signals to yield p model output signals for each model output summer; a plurality of p model error summers, each receiving an uncancelled equation error signal from one of the uncancelled equation error summers and a model output signal from one of the model output summers, and outputting one of p model error signals wherein each model error signal is used to update each of the n×m channels in the adaptive filter model; and a copy of the adaptive filter model that receives the m reference signals and outputs the n correction signals.

Claim 10

An adaptive control system having a system input and a system output, the system comprising: a plurality of n output transducers each receiving one of n correction signals and outputting a secondary input that combines with the system input to yield the system output; a correction signal filter having p×n channels, the correction signal filter receiving n correction signals and outputting p filtered correction signals; a plurality of p error sensors, each error sensor sensing the system output and outputting an error signal; a plurality of p uncancelled equation error summers, each uncancelled equation error summer receiving one of the p error signals and one of the p filter correction signals and outputting an uncancelled equation error signal; an adaptive filter model having p adaptive elements corresponding to each of n×m filter model channels, each of the p×n×m adaptive elements outputting an element output signal; a reference signal filter corresponding to each adaptive filter model element, each reference signal filter receiving one of m reference signals and outputting a filtered reference signal to the corresponding adaptive filter model element; a plurality of p model output summers, each summing n×m element output signals to yield p model output signals for each model output summer; a plurality of p model error summers, each receiving an uncancelled equation error signal from one of the uncancelled equation error summers and a model output signal from one of the model output summers, and outputting one of p model error signals wherein each model error signal is used to update each of the n×m channels in the adaptive filter model; and a copy of the adaptive filter model that receives the m reference signals and outputs the n correction signals.

Claim 11

The system as recited in claim 5 further comprising a plurality of m input sensors, each sensing the system input and outputting an input signal that is used as one of the m reference signals.

Claim 12

The system as recited in claim 5 further comprising: a plurality of m input sensors each sensing the system input and outputting an input signal; an adaptive D filter model that receives the n correction signals and outputs a plurality of m D Model output signals; and a plurality of m reference signal summers each receiving an input signal and a D model output signal and outputting one of the m reference signals.

Claim 13

A system as recited in claim 5 wherein the p uncancelled equation error signals are also used as the m reference signals.

Claim 14

A system as recited in claim 5 wherein the adaptive control system is an active acoustic attenuation system, the system input is an input acoustic wave, and the system output is an output acoustic wave.

Claim 15

A system as recited in claim 9 wherein the active acoustic attenuation system is a sound attenuation system, the output transducers are loudspeakers, and the error sensors are microphones.

Claim 16

A system as recited in claim 9 wherein the active acoustic attenuation system is a vibration control system, the output transducers are shakers, and the error sensors are accelerometers.

Claim 17

An adaptive control method in an active control system having a system input and a system output comprising the steps of: generating a control signal from a correction signal; combining the control signal with the system input to yield the system output; sensing the system output and generating an error signal in response thereto; filtering the correction signal to yield a filtered correction signal; combining the filtered correction signal and the error signal to yield an uncancelled equation error signal; filtering a reference signal to yield a filtered reference signal; processing the filtered reference signal through an adaptive filter model to generate a model output signal; combining the uncancelled equation error signal and the model output signal to yield a model error signal; adapting the adaptive filter model at least in part in response to the model error signal; processing the reference signal through a copy of the adaptive filter model to generate the correction signal; sensing the system input and generating an input signal in response thereto; processing the correction signal through a D model to generate a D model output signal; and combining the D model output signal and the input signal to generate the reference signal.

Claim 18

An adaptive control method in an active control system having a system input and a system output comprising the steps of: generating a control signal from a correction signal; combining the control signal with the system input to yield the system output; sensing the system output and generating an error signal in response thereto; filtering the correction signal to yield a filtered correction signal; combining the filtered correction signal and the error signal to yield an uncancelled equation error signal; filtering a reference signal to yield a filtered reference signal; processing the filtered reference signal through an adaptive filter model to generate a model output signal; combining the uncancelled equation error signal and the model output signal to yield a model error signal; adapting the adaptive filter model at least in part in response to the model error signal; processing the reference signal through a copy of the adaptive filter model to generate the correction signal; sensing the system input and generating an input signal in response thereto; processing the correction signal through a D model to generate a D model output signal; and combining the D model output signal and the input signal to generate the reference signal.

Claim 19

An adaptive control method in an active control system having a system input and a system output comprising the steps of: generating a plurality of n control signals, each from one of n correction signals; signal; combining the control signals with the system input to yield the system output; sensing the system output and generating a plurality of p error signals in response thereto; processing the n correction signals through a copy of a p×n C model to generate p filtered correction signals; combining the p error signals and the p correction signals to yield p uncancelled equation error signals; separately processing each of a plurality of m reference signals through each of p×n channels of a copy of the C model to generate m×p×n filtered reference signals; processing the filtered reference signals through an adaptive filter model to generate a plurality of p model output signals; combining the p uncancelled equation error signals and the p model output signals to generate p model error signals; using the p model error signals to adapt the adaptive filter model; and processing the m reference signals through a copy of the adaptive filter model to generate the n correction signals.

Claim 20

An adaptive control method in an active control system having a system input and a system output comprising the steps of: generating a plurality of n control signals, each from one of n correction signals; signal; combining the control signals with the system input to yield the system output; sensing the system output and generating a plurality of p error signals in response thereto; processing the n correction signals through a copy of a p×n C model to generate p filtered correction signals; combining the p error signals and the p correction signals to yield p uncancelled equation error signals; separately processing each of a plurality of m reference signals through each of p×n channels of a copy of the C model to generate m×p×n filtered reference signals; processing the filtered reference signals through an adaptive filter model to generate a plurality of p model output signals; combining the p uncancelled equation error signals and the p model output signals to generate p model error signals; using the p model error signals to adapt the adaptive filter model; and processing the m reference signals through a copy of the adaptive filter model to generate the n correction signals.