System for computationally efficient adaptation of active control of sound or vibration
AssigneeSikorsky Aircraft Corporation
InventorsDouglas G. MacMartin, William Arthur Welsh, James W. Fuller
Life of this patent
Estimating the term…
Abstract
In a method for reducing sensed physical variables generating a plurality of control commands are generated at a control rate as a function of the sensed physical variables. An estimate of a relationship between the sensed physical variables and the control commands is also is used in generating the plurality of control commands. The estimate of the relationship is updated based upon a response by the sensed physical variables to the control commands. The generation of the control commands involves a quadratic dependency on the estimate of the relationship and the quadratic dependency is updated based on the update to the estimate.
Claims21
A method for reducing sensed physical variables including the steps of:
- a) generating a plurality of control commands as a function of the sensed physical variables;
- b) generating an estimate of a relationship between the sensed physical variables and the control commands, wherein the estimate is used in said step a) in generating the plurality of control commands;
- c) sensing a response by the sensed physical variables to the control commands and updating the estimate of the relationship in said step b) based upon the response by the sensed physical variables to the control commands, wherein the control command in said step a) includes a normalization factor on the convergence rate that depends on said estimate in step b), and wherein said normalization factor is updated based on the update to the estimate.
A method for reducing sensed physical variables including the steps of:
- a) generating a plurality of control commands as a function of the sensed physical variables based upon an estimate of a relationship between the sensed physical variables and the control commands;
- and
- b) sensing a response by the sensed physical variables to the control commands and updating the estimate of the relationship in said step a) based upon the response by the sensed physical variables to the control commands by treating the updating of the estimate as a portion of a QR decomposition and solving the QR decomposition.
A system for controlling a plurality of sensed physical variable comprising:
- a plurality of sensors for measuring the physical variables;
- a control unit generating an estimate of a relationship between the sensed physical
- variables and a plurality of control commands, and generating the plurality of control commands over time based upon the sensed physical variables and based upon the relationship;
- and
- a plurality of force generators activated based upon said plurality of command signals;
- wherein the control unit updates the estimate of the relationship based upon a response by the sensed physical variables to the control commands, wherein the control command includes a normalization factor on a convergence rate that depends on said estimate, and wherein said normalization factor is updated based on the update to the estimate.
A system for controlling a plurality of sensed physical variable comprising:
- a plurality of sensors for measuring the physical variables;
- a control unit generating an estimate of a relationship between the sensed physical variables and a plurality of control commands, and generating the plurality of control commands over time based upon the sensed physical variables and based upon the relationship, the control unit updating the estimate of the relationship based upon a response by the sensed physical variables to the control commands by treating the updating of the estimate as a portion of a QR decomposition and solving the QR decomposition.
A method for reducing sensed physical variables including the steps of:
- a) generating a matrix of sensed physical variable data (zk)
- b) generating a matrix of control command data (uk) wherein Δzk=T Δuk, and where T is a matrix representing an estimate of a relationship between the sensed physical variables and the plurality of control commands;
- c) sensing a response by the sensed physical variables (Zk) to the control command data and updating the T matrix according to (Tk+1=Tk+EKH
- where K is a gain matrix and E is residual vector formed as E=y−Tv, and where yk=ΔZk, and vk=Δuk, wherein the control commands in said step b) include a normalization factor on a convergence rate that depends on the T matrix, and wherein said normalization factor is updated based on the update to the T matrix.
Dependencies are inferred from the claim text.