System and method for roll angle indication and measurement in flying objects
First Claim
1. A method for onboard determination of a roll angle of a projectile, the method comprising:
- transmitting a polarized RF signal from a reference source, with a predetermined polarization plane;
receiving the signal at a pair of polarized RF sensor cavities positioned symmetrical on the projectile with respect to the predetermined polarization plane;
receiving the signal at a third polarized RF sensor cavity positioned such that it receives a maximum signal at zero roll angle positioning;
differentiating between up or down positioning of the desired roll angle position based on an output from a fourth sensor on the projectile;
analyzing an output of the pair of polarized RF sensor cavities and the third RF sensor cavity resulting from the received signal and an output of the fourth sensor;
generating a curve based on the output of the pair of polarized RF sensor cavities and the third RF sensor cavity indicating a relationship between roll angle and the third sensor output; and
determining a roll angle positioning of the projectile based on the curve.
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Accused Products
Abstract
A method for onboard determination of a roll angle of a projectile. The method including: transmitting a polarized RF signal from a reference source, with a predetermined polarization plane; receiving the signal at a pair of polarized RF sensor cavities positioned symmetrical on the projectile with respect to the predetermined polarization plane; receiving the signal at a third polarized RF sensor cavity positioned such that it receives a maximum signal at zero roll angle positioning; differentiating between up or down positioning of the desired roll angle position based on an output from a fourth sensor on the projectile; analyzing an output of the pair of polarized RF sensor cavities and the third RF sensor cavity resulting from the received signal and an output of the fourth sensor; generating a curve based on the output of the pair of polarized RF sensor cavities and the third RF sensor cavity indicating a relationship between roll angle and the third sensor output; and determining a roll angle positioning of the projectile based on the curve.
33 Citations
10 Claims
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1. A method for onboard determination of a roll angle of a projectile, the method comprising:
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transmitting a polarized RF signal from a reference source, with a predetermined polarization plane; receiving the signal at a pair of polarized RF sensor cavities positioned symmetrical on the projectile with respect to the predetermined polarization plane; receiving the signal at a third polarized RF sensor cavity positioned such that it receives a maximum signal at zero roll angle positioning; differentiating between up or down positioning of the desired roll angle position based on an output from a fourth sensor on the projectile; analyzing an output of the pair of polarized RF sensor cavities and the third RF sensor cavity resulting from the received signal and an output of the fourth sensor; generating a curve based on the output of the pair of polarized RF sensor cavities and the third RF sensor cavity indicating a relationship between roll angle and the third sensor output; and determining a roll angle positioning of the projectile based on the curve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A projectile comprising:
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a casing; a pair of polarized RF sensor cavities positioned symmetrically on the casing with respect to a predetermined polarization plane; a third polarized RF sensor cavity positioned on the casing such that it receives a maximum signal at zero roll angle positioning; a fourth sensor positioned on the casing; and a processor configured to; analyze an output of the pair of polarized RF sensor cavities and the third RF sensor cavity resulting from the received signal and the fourth sensor; generate a curve based on the output of the pair of polarized RF sensor cavities and the third RF sensor cavity indicating a relationship between roll angle and the third sensor output; and determine a roll angle positioning of the projectile based on the curve.
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Specification