Method and computer program product for estimating at least one state of a dynamic system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G05D-001/08
G05B-005/01
G06F-015/50
출원번호
US-0967403
(2001-09-27)
발명자
/ 주소
Jones, Richard D.
Speer, Thomas E.
출원인 / 주소
The Boeing Company
대리인 / 주소
Alston & Bird LLP
인용정보
피인용 횟수 :
7인용 특허 :
11
초록▼
A method and computer program product are provided for estimating the states of a dynamic system based upon a combination of first and second feedback signals. The first feedback signal is based upon anticipated state changes and is typically represented by a state propagation model. The second feed
A method and computer program product are provided for estimating the states of a dynamic system based upon a combination of first and second feedback signals. The first feedback signal is based upon anticipated state changes and is typically represented by a state propagation model. The second feedback signal is based upon the difference between the anticipated and actual measurements of the sensors. This difference may be weighted based upon a predetermined criteria, such as the credibility of the actual measurements and/or the degree to which outlying sensor measurements are to be discounted. The weighted difference is converted into a corresponding change in the state estimates. At least one feedback signal may then be modified to define its relative contribution to the state estimates. The first and second feedback signals are thereafter combined to produce the state estimates, subject generally to limitations upon the permissible changes in the state estimates.
대표청구항▼
A method and computer program product are provided for estimating the states of a dynamic system based upon a combination of first and second feedback signals. The first feedback signal is based upon anticipated state changes and is typically represented by a state propagation model. The second feed
A method and computer program product are provided for estimating the states of a dynamic system based upon a combination of first and second feedback signals. The first feedback signal is based upon anticipated state changes and is typically represented by a state propagation model. The second feedback signal is based upon the difference between the anticipated and actual measurements of the sensors. This difference may be weighted based upon a predetermined criteria, such as the credibility of the actual measurements and/or the degree to which outlying sensor measurements are to be discounted. The weighted difference is converted into a corresponding change in the state estimates. At least one feedback signal may then be modified to define its relative contribution to the state estimates. The first and second feedback signals are thereafter combined to produce the state estimates, subject generally to limitations upon the permissible changes in the state estimates. 11. A method as in claim 1, wherein the locking step comprises providing an adhesive bond. 12. A method as in claim 1, wherein the locking step comprises providing a knot. 13. A method as in claim 1, wherein the locking step comprises providing a compression fit. 14. A method as in claim 1, further comprising the steps of first measuring the coronary sinus and then selecting an appropriately sized prosthesis prior to the transluminally advancing step. 15. A method as in claim 1, wherein the step of monitoring hemodynamic function is accomplished using transesophageal echo cardiography. 16. A method as in claim 1, wherein the step of monitoring hemodynamic function is accomplished using surface echo cardiographic imaging. 17. A method as in claim 1, wherein the step of monitoring hemodynamic function is accomplished using intracardiac echo cardiographic imaging. 18. A method as in claim 1, wherein the step of monitoring hemodynamic function is accomplished using fluoroscopy with radiocontrast media. 19. A method as in claim 1, wherein the step of monitoring hemodynamic function is accomplished using left atrial or pulmonary capillary wedge pressure measurements. 20. A method as in claim 1, further comprising the step of determining an ongoing drug therapy taking into account post implantation hemodynamic function. 21. A method of remodeling a mitral valve annulus to reduce mitral valve regurgitation, comprising the steps of: providing a prosthesis which is adjustable between a first configuration for transluminal deployment within the coronary sinus and a second configuration for exerting a compressive force against the mitral valve annulus from within the coronary sinus; transluminally advancing the prosthesis to a position at least partially within the coronary sinus; tightening the prosthesis to reduce mitral valve regurgitation; locking the prosthesis to retain a compressive force on the annulus following the tightening step; and monitoring the degree of regurgitation. 22. A method as in claim 21, wherein the monitoring step comprises monitoring the degree of regurgitation prior to the tightening step. 23. A method as in claim 21, wherein the monitoring step comprises monitoring the degree of regurgitation during the tightening step. 24. A method as in claim 21, wherein the monitoring step comprises monitoring the degree of regurgitation following the tightening step. 25. A method of remodeling a mitral valve annulus as in claim 21, wherein sufficient tightening is accomplished to achieve at least a one grade reduction in regurgitation. 26. A method as in claim 21, further comprising the step of percutaneously accessing the venous system prior to the transluminally advancing step. 27. A method as in claim 26, wherein the accessing step is accomplished by accessing one of the internal jugular, subclavian or femoral veins. 28. A method as in claim 21, wherein the tightening step comprises axially moving a forming element with respect to the prosthesis, to bend the prosthesis. 29. A method as in claim 21, wherein the locking step comprises moving an engagement surface from a disengaged configuration to an engaged configuration. 30. A method as in claim 21, wherein the locking step comprises providing an interference fit. 31. A method as in claim 21, wherein the locking step comprises providing an adhesive bond. 32. A method as in claim 21, wherein the locking step comprises providing a knot. 33. A method as in claim 21, wherein the locking step comprises providing a compression fit. 34. A method as in claim 21, further comprising the steps of first measuring the coronary sinus and then selecting an appropriately sized prosthesis prior to the transluminally advancing step. 35. A method as in claim 21, wherein the monitoring step is accomplished using transesophageal echo cardiography. 36. A method as in claim 21, wherein the monitoring step is accomplished using surface echo cardiographic imaging. 37. A method as in c laim 21, wherein the monitoring step is accomplished using intracardiac echo cardiographic imaging. 38. A method as in claim 21, wherein the monitoring step is accomplished using fluoroscopy with radiocontrast media. 39. A method as in claim 21, wherein the monitoring step is accomplished using left atrial or pulmonary capillary wedge pressure measurements. 40. A method as in claim 21, further comprising the step of determining an ongoing drug therapy taking into account post implantation hemodynamic function. 41. A method as in claim 40, comprising measuring residual regurgitation following implantation and formulating an ongoing drug therapy taking into account the residual regurgitation. of claim 24, wherein controlling the electromagnetic energy directed to the tissue based on the transducer signal further comprises reducing the electromagnetic energy directed to the tissue based on the ablation temperature. 30. A method for use in ablating tissue, comprising: providing a catheter comprising an ablation electrode; ablating tissue using the ablation electrode, wherein the ablation electrode directs electromagnetic energy to the tissue; detecting acoustical energy and providing a transducer signal representative of the detected acoustical energy; measuring a sound intensity of the detected acoustical energy; comparing the measured sound intensity to a sound intensity threshold; if the measured sound intensity is greater than the sound intensity threshold, then comparing the transducer signal to at least a portion of an ECG waveform; and reducing the electromagnetic energy directed to the tissue if the transducer signal and the at least a portion of an ECG waveform are asynchronous. 31. The method of claim 30, wherein the method further comprises triggering an electrode stability alarm if the transducer signal and the at least a portion of an ECG waveform are synchronous. 32. A method for use in ablating cardiac tissue, comprising: providing a catheter comprising an ablation electrode and a tensiometric element; ablating tissue using the ablation electrode, wherein the ablation electrode directs electromagnetic energy to the cardiac tissue; detecting a plurality of cardiac contractions using the tensiometric element and providing a tensiometric signal representative of the plurality of cardiac contractions; detecting acoustical energy and providing a transducer signal representative of the detected acoustical energy; comparing the tensiometric signal to the transducer signal; and controlling the electromagnetic energy directed to the cardiac tissue based on the compared tensiometric signal and transducer signal. 33. The method of claim 32, wherein the detected acoustic energy comprises a plurality of sound events, wherein comparing the tensiometric signal to the transducer signal further comprises measuring a time interval between at least one sound event and at least one cardiac contraction. 34. The method of claim 33, wherein the method further comprises triggering an electrode stability alarm if the time interval is equal to a predetermined threshold delay interval. 35. The method of claim 33, wherein the method further comprises analyzing the transducer signal if the time interval is not equal to a predetermined threshold delay interval. 36. The method of claim 35, wherein analyzing the transducer signal further comprises: removing at least a cardiac generated acoustical energy component from the transducer signal; and comparing the transducer signal having the at least a cardiac generated acoustical energy component removed therefrom to an acoustic profile representative of a popping sound to detect at least one popping sound. 37. The method of cl
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