G - Physics – 05 – B
Patent
G - Physics
05
B
G05B 13/04 (2006.01) A61F 11/06 (2006.01) H04B 15/00 (2006.01)
Patent
CA 2150053
An active adaptive control system introduces a control signal from an output transducer (14) to combine with the system input signal (6) and yield a system output signal (8). An error transducer (16) senses the system output signal and provides an error signal (44). An adaptive filter model (40) has a model input from a reference signal (42) correlated to the system input signal, and an output outputting a correction signal (46) to the output transducer to introduce the control signal according to a weight update signal (74) provided by the product (from multiplier 72) of the reference signal and the error signal. Selective leakage of the weight update signal is provided in response to a given condition of a given parameter, preferably output power of the correc- tion signal, to control performance of the model, to selectively degrade same according to need. Leakage is varied by multiplying a previous weight update value by a factor .gamma. and adding the result to the product of the reference signal and error signal, and varying .gamma. as a function of the correction signal.
Finn Brian M.
Trantow Jerry J.
Borden Ladner Gervais Llp
Digisonix Inc.
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