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公开(公告)号：US11435430B2
公开(公告)日：2022-09-06
申请号：US17112118
申请日：2020-12-04
Inventor： Peter Dusaitis , Matthew F. Chrobak , Brian J. Smith , Paul D. Zemany
Abstract: A method for launching a round from an airborne platform, receiving a plurality of RF signals at the round, determining an amount of time between a first and second received RF signal, where the second signal is a multi-path signal and the first signal is a direct path signal. An altitude of the round is determined based on the delay between the first and second received signal and aligning the round's flight path with an initial velocity vector of the aircraft platform to reduce dispersion. The round can include a plurality of sensors for detecting the RF signals. The second received RF signal may be a multi-path signal having been reflected off of the earth's surface or another object on the earth's surface. The altitude of the round can be determined using the known altitude of the airborne platform, the delay of time between the first and second received signals, and the speed of light.
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公开(公告)号：US11342687B1
公开(公告)日：2022-05-24
申请号：US17235271
申请日：2021-04-20
Inventor： Court E. Rossman , Maxwell L. Affleck , Matthew F. Chrobak , James F. Fung , Paul D. Zemany
Abstract: An endfire antenna structure is disclosed that is for use on aerodynamic systems. The antenna structure includes a first layer of patterned metal, a second layer of patterned metal, and a stack of material layers that includes the first layer of patterned metal and the second layer of patterned metal. The first layer of patterned metal includes a plurality of parallel slots etched through the metal. The second layer of patterned metal includes a tapered radio frequency (RF) feedline having a narrow end coupled to an input/output (I/O) antenna connection. The second layer of patterned metal is aligned over the first layer of patterned metal such that the tapered RF feedline has a length that extends across the plurality of parallel slots. The stack of material layers is flexible such that the stack of material layers is configured to wrap at least partially around the fuselage of an aerodynamic system.
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公开(公告)号：US11287233B2
公开(公告)日：2022-03-29
申请号：US16960971
申请日：2019-08-30
Inventor： Paul D. Zemany , Matthew F. Chrobak
IPC: F42B10/26
Abstract: A guided projectile including a precision guidance munition assembly utilizes angular rate sensors to sample a first angular velocity of the precision guidance munition assembly from the first angular rate sensor at a first time, sample a second angular velocity of the precision guidance munition assembly from the second angular rate sensor at the first time, generate a coning command based, at least in part, on the first angular velocity and the second angular velocity, and apply the coning command to the canard assembly. The range may be decreased or increased based on the coning commands.
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公开(公告)号：US20210102790A1
公开(公告)日：2021-04-08
申请号：US16595609
申请日：2019-10-08
Inventor： David J. Schorr , Matthew F. Chrobak , Thomas T. Scarberry , Richie Spitsberg , Paul E. Turner
Abstract: A rocket in one example includes separate chambers for storing two thrust grains: an initial thrust grain and a boost thrust grain. The initial thrust grain is stored in a first chamber and the boost thrust grain is stored in a second chamber. The initial thrust grain is ignited separately from the boost thrust grain, such as in a two-stage process where the initial thrust grain is ignited before, or at the same time as, the boost thrust grain. The initial thrust grain has a large surface area (different burn pattern) relative to the boost thrust grain, which causes the initial thrust grain to have a shorter burn time than the boost thrust grain.
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