Automatic load monitoring system with remote sensing
First Claim
1. A method of generating, from a first set of signals measured in a first member indicative of a first member parameter, a relational set of signals substantially equating with said first signal set a second set of signals indicative of said parameter as measured in a cooperative second member, said method comprising the steps of:
- measuring a first signal set indicative of a first member parameter by means of sensors directly configured with the first member;
measuring a second signal set by means of sensors directly configured with the second member, said second member measured signal set including signals indicative of said parameter;
Fourier decomposing said first member signal set into signals corresponding to a time independent first member Fourier coefficient signal set therefor;
Fourier decomposing said second member signal set into signals corresponding to a time independent second member Fourier coefficient signal set therefor;
said first and second member Fourier coefficient signal sets corresponding to respective first and second mathematical vectors lying in a vector space with each of said signal sets mathematically configured into respective first and second matrices comprised of elements corresponding to Fourier coefficient signals thereof arranged in rows and columns,computing, from said second member Fourier coefficient signal set a substantially independent signal subset thereof having a plurality of signal elements that substantially spans said mathematical vector space; and
generating a relational signal set corresponding to a mathematical pseudo inverse of said first member Fourier coefficient signal set with said substantially independent signal subset.
1 Assignment
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Accused Products
Abstract
A novel system for determining the magnitudes of loads on rotating helicopter components from signals remotely measured on the helicopter fuselage is characterized by a processor which decomposes the measured signals into corresponding Fourier components and extracts selected components therefrom. A programming module performs a multiplication on the respective Fourier components to correlate the measured components with corresponding determinative parameter values. The parameter values are established in a calibration process which is characterized by determination of the independent values of a measured signal set using a Jones orthogonalization process. The signals output from the coefficient programming module are provided to a multiplying resolver which receives synthesized reference sinusoids from a digital processor and generates time dependent signal components therefrom. These signals are ultimately summed in an analog summer circuit whose output signal corresponds to the desired parameter signal.
24 Citations
32 Claims
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1. A method of generating, from a first set of signals measured in a first member indicative of a first member parameter, a relational set of signals substantially equating with said first signal set a second set of signals indicative of said parameter as measured in a cooperative second member, said method comprising the steps of:
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measuring a first signal set indicative of a first member parameter by means of sensors directly configured with the first member; measuring a second signal set by means of sensors directly configured with the second member, said second member measured signal set including signals indicative of said parameter; Fourier decomposing said first member signal set into signals corresponding to a time independent first member Fourier coefficient signal set therefor; Fourier decomposing said second member signal set into signals corresponding to a time independent second member Fourier coefficient signal set therefor; said first and second member Fourier coefficient signal sets corresponding to respective first and second mathematical vectors lying in a vector space with each of said signal sets mathematically configured into respective first and second matrices comprised of elements corresponding to Fourier coefficient signals thereof arranged in rows and columns, computing, from said second member Fourier coefficient signal set a substantially independent signal subset thereof having a plurality of signal elements that substantially spans said mathematical vector space; and generating a relational signal set corresponding to a mathematical pseudo inverse of said first member Fourier coefficient signal set with said substantially independent signal subset. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for use in generating, from a first set of signals measured in a first member indicative of a first member parameter, a relational set of signals equating with said first signal set a second set of signals indicative of said parameter as measured in a cooperative second member, said apparatus comprising:
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means directly configured with the first member for measuring a signal set indicative of a first member parameter; means directly configured with the second member for measuring a second signal set including signals indicative of said parameter; a controller including means for Fourier decomposing said first member signal set into signals corresponding to a selected time independent first Fourier coefficient signal set means for Fourier decomposing said second member signal set into signals corresponding to a selected time independent second Fourier coefficient signal set; said first and second Fourier coefficient signal sets corresponding to respective first and second mathematical vectors lying in a vector space with each of said signal sets mathematically configured into respective first and second matrices comprised of elements corresponding to Fourier coefficient signals thereof arranged in rows and columns, said controller for computing, from said second Fourier coefficient signal set, a substantially independent signal subset thereof having a plurality of elements that substantially spans said mathematical vector space, and for generating a relational signal set comprised of a mathematical pseudo inverse of said substantially independent signal subset and said first Fourier coefficient signal set. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An electronic phase synchronization circuit receiving a periodic timing signal having a period and a signal phase, comprising:
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a control signal circuit receiving said periodic timing signals, for generating, during said timing signal period, a selected number of control signals; a synthesizer circuit receiving said control signals, for generating in response thereto a plurality of first and second periodic signals, each of said first and second synthesizer periodic signals characterized by a signal phase and a frequency, said control signals selectively enabling said synthesizer circuit to output selected ones of said first and second synthesizer periodic signals; and a circuit for adjusting, once per said timing signal period, the phase of said first and second synthesizer periodic signals to equal the phase of said periodic timing signal. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. A system for determining a time dependent signal corresponding to a parameter in a first member, said system comprising:
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a means for measuring a time dependent signal set in a second member cooperative with said first member including signals indicative of said first member parameter; and a controller, including a means for Fourier decomposing said second member signal set into a set of signals corresponding to a selected time independent second member Fourier coefficient signal set therefore; a correlating means for generating a computed first member parameter signal set indicative of said first member parameter that combines said second member Fourier coefficient signal set with a signal set of predetermined correlation coefficients generated by computing a mathematical pseudo-inverse of first member Fourier coefficient signal set corresponding to Fourier coefficients of first member parameter signals directly measured in said first member with a signal set corresponding to a substantially independent subset of signals indicative of said first member parameter directly measured in said second member, said first and second member Fourier coefficient signal sets corresponding to respective first and second mathematical vectors lying in a vector space with each of said signal sets mathematically configured into respective first and second matrices comprised of elements corresponding to signals thereof arranged in rows and columns; and a means for generating from periodic signals and said computed first member parameter signal set a time dependent signal indicative of said first member parameter. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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31. A method for use in determining values of a physical parameter in a first member, comprising the steps of:
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measuring a time dependent signal set in a second member cooperative with said first member including signals indicative of said first member parameter; Fourier decomposing said second member signal set into a set of signals corresponding to selected time independent second member Fourier coefficeint signal set therefor; generating a computed first member parameter signal set indicative of said first member parameter that combines said second member Fourier coefficient signal set with predetermined correlation coefficients generated by computing a mathematical pseudo-inverse of a first member Fourier coefficient signal set corresponding to Fourier coefficients of first member parameter signals directly measured in said first member with a signal set corresponding to a substantially independent subset of signals indicative of said first member parameter directly measured in said second member, said first and second member Fourier coefficient signal sets corresponding to respective first and second mathematical vectors lying in a vector space with each of said signal sets mathematically configured into respective first and second matrices comprised of elements corresponding to signals thereof arranged in rows and columns; and generating from periodic signals and said computed first member parameter signal set a time dependent signal corresponding to said first member parameter.
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32. An apparatus for use in generating, from a first set of signals measured in a first member indicative of a first member parameter, a relational set of signals equating with said first signal set a second set of signals indicative of said parameter as measured in a cooperative second member, said apparatus comprising:
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a means directly configured with the first member for measuring a first member signal set indicative of a first member parameter; a means directly configured with the second member for measuring a second member signal set including signals indicative of said parameter; a controller including a means for transforming said first member signal set into signals corresponding to a selected time independent first coefficient signal set, a means for transforming said second member signal set into signals corresponding to a selected time independent second coefficient signal set; said first and second coefficient signal sets corresponding to respective first and second mathematical vectors lying in a vector space with each of said signal sets mathematically configured into respective first and second matrices comprised of elements corresponding to coefficient signals thereof arranged in rows and columns, said controller for computing, from said second coefficient signal set, a substantially independent signal subset thereof having a plurality of elements that substantially spans said mathematical vector space, and for generating a relational signal set comprised of a mathematical pseudo inverse of said substantially independent signal subset and said first coefficient signal set.
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Specification