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US 6,208,739 B1Granted
Noise and vibration suppression method and system
AssigneeThe Regents of the University of Michigan
InventorsRavinder Venugopal, Dennis S. Bernstein
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AssigneeThe Regents of the University of Michigan
InventorsRavinder Venugopal, Dennis S. Bernstein
Estimating the term…
A method and system for attenuating the effects of unknown, unmeasurable and time-varying exogenous disturbances on multiple-input multiple-output dynamical systems are described. The disturbance rejection system is characterized in terms of an ARMARKOV or predictive model controller. The parameters of this controller are revised in real time at discrete time steps so as to generate an input to the dynamical system that attenuates the effect of the exogenous disturbance on any chosen set of measured outputs of the dynamical system. The method for revising the controller parameters involves the steps of defining a novel retrospective cost function based on windows of past data, calculating a gradient that is based on this cost function, and using an implementable adaptive step size that brings the controller parameters closer to optimal controller parameters after each revision. The method and system are applicable to active noise and vibration control and reject single-tone, multi-tone, sine sweeping and broadband disturbances in acoustic spaces.
A method for rejecting exogenous disturbances by adaptive disturbance rejection at a chosen set of outputs of a dynamic system for active noise and vibration control, the method comprising the following steps:
A system for adaptive disturbances rejection at a chosen set of outputs of a dynamic system for active noise and vibration control, the system comprising:
A system for adaptive disturbances rejection at a chosen set of outputs of a dynamic system for active noise and vibration control, the system comprising:
Dependencies are inferred from the claim text.